Intel Fast Memcpy

From: Amit Paliwal (paliwal_at_jhu. The naive handmade memcpy is nothing more than this code (not to be the best implem ever but at least safe for any kind of buffer size):. SyS_ioctl+0x74/0x80 [ 12. The overhead is relatively low (150-200 clock cycles) and it occurs in all tested functions, so you can neglect it when measuring long functions (e. Fast memcpy would then be enabled only if the target processor support: - lfd/stfd instructions and floating point support is ON OR - evldd/evstd instructions *** Please note that there is a code size tradeoff when enabling fast memcpy as. 7 to 8 * problem might be worse on faster NUC (core i5) than on slower NUC (core i3). The #pragma directive can also be used for other compiler-specific purposes. A community for discussing topics related to all Xilinx products, as well as Xilinx software, intellectual property, applications and solutions. you can find out the cause of ora ORA-07445 and ORA-600 errors on metalink by ORA-07445 debugging tool. Even in the absence of competition if Intel could make a processor twice as fast, they'd make it half the size and sell the same performance at a much higher profit margin. Eigen is overall of comparable speed (faster or slower depending on what you do) to the best BLAS, namely Intel MKL and GOTO, both of which are non-Free. Josh Triplett (who is also a principal engineer at Intel), discussed "what Intel is contributing to bring Rust to full parity with C," in a talk titled Intel and Rust: the Future of. Medium devsel. MPICH_FAST_MEMCPY use an optimised memory copy function in all MPI routines. Comment 8 Matt Turner 2015-03-04 20:45:24 UTC Yeah, sounds like (b) is a good option. Okay, benchmarking The Bible on 7th gen Intel CPU using latest-fastest-strongest compressors included in the superb lzbench and TurboBench. From:: Greg Kroah-Hartman To:: linux-kernel-AT-vger. The rest of this chapter is completely Intel specific. My conclusion on all this - if you want to implement fast memcpy, don't bother with SSE on modern CPU's. You can also (or may have to) deal with alignment here as well. REP string can operate in "fast string" even if address is not aligned to 16bytes. Agreed and agreed. 8MB compared to the 68-point model's 96MB. So, let's assume that you have assembly written by a skilled assembly language programmer with an eye to optimizing performance. They wanted to allow the compiler to implement the absolute fastest code possible for the base machine. A()+18] during Managed Standby Redo Apply in a standby database (Doc ID 1953045. These are object arrays anyway, so there's plenty of overhead already, and I don't think this would affect regular numerical arrays. If you don't have that then there's really nothing you can do. Based on some not very comprehensive tests of LLVM’s clang (the default compiler on macOS), GNU gcc, Intel’s compiler (icc) and MSVC (part of Microsoft Visual Studio), only clang makes aggressive use of 512-bit instructions for simple constructs today: it used such instructions while copying structures, inlining memcpy, and vectorizing loops. We’ll perform measurements later. Flame Graph Reset Zoom. And while the PC market has shrunk it's still 270 million PCs/year or about 75% of its all time high, it's a huge market even if it's not a growth market anymore. (This may be a duplicate question). It has been designed to transmit data to the processor cache faster than the traditional, non-compressed, direct memory fetch approach via a memcpy() OS call. It's used quite a bit in some programs and so is a natural target for optimization. Each bug is given a number, and is kept on file until it is marked as having been dealt with. Overview • Compressing faster than memcpy(). CPU overhead is low, but. For short I/Os (below 24KB, tunable) driver still uses memcpy(), since it is faster. Generate faster, smaller code Green Hills optimizing compilers are the best on the market. All threads within a process share the same address space. It is currently Mon Sep 21, 2020 1:04 pm. I just bought the HP Envy x360 which has a 6 core AMD Ryzen 5 4500U. Fast Memory benchmark - test your RAM speed You dont always need an extended memory test on Windows 10, 8. Well, experimentation with newer compiler didn't succed on creating smaller executable file than with the 6. ORA-07445: caught exception [ACCESS_VIOLATION] at [_intel_fast_memcpy. Performance measurement is done on an Intel® system with preproduction Intel Xeon Scalable processors running at 2. Last visit was: Mon Sep 21, 2020 1:04 pm. "Linux creator Linus Torvalds had some choice words today on Advanced Vector Extensions 512 (AVX-512) found on select Intel processors," reports Phoronix: In a mailing list discussion stemming from the Phoronix article this week on the compiler instructions Intel is enabling for Alder Lake (and Sapp. Intel® RealSense™ DIM Weight Software Try for free Beta Intel® RealSense™ Dimensional Weight Software Measuring packages at the speed of light. OR - evldd/evstd instructions *** Please note that there is a code size tradeoff when enabling fast memcpy as. Don't even try to compile the code here. As a rule of thumb, it's generally good to use memcpy (and consequently fill-by-copy) if you can — for large data sets, memcpy doesn't make much difference, and for smaller data sets, it might be much faster. Intel and AMD keep the old instructions around mainly for backward compatibility. (Note that Pentium III processors may incur a penalty since the L2 cache runs at half the speed of the processor core and L1. Are there faster alternatives to memcpy() in C++? Stack Overflow Public questions & answers; Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers. Both tests are running on the same Windows 7 OS x64, same machine Intel Core I5 750 (2. Major partners and customers Foreign partners: Microsoft Research, Intel Labs, Nokia, Google, ETRI,. A community for discussing topics related to all Xilinx products, as well as Xilinx software, intellectual property, applications and solutions. You can also (or may have to) deal with alignment here as well. Why have a separate memcpy() at all, when it clearly is correct - and nice to people - to always just implement it as a memmove(). 5% of executed instructions. Not using REP MOVESB is actually a good thing even on some Intel microarchitectures. None the less, sometimes (on a very fast pipelined processors, for example) it's useful to implement mem copy loop with the target processors word (or even double word) elements (with previous loop counter calculations and proper pointers casting). The pixels pack. ORA-07445: exception encountered: core dump [_intel_fast_memcpy. The memcpy() call on line 7 is also protected by an explicit range check on line 6 that tests both the upper and lower bounds. For improved memcpy (_intel_fast_memcpy) you would want it set to interlieved (not NUMA). According to the experiment when copy size is. Hitting ORA-07445 Ntel_new_memcpy While Creating Queue Table SYS. c -o fast_memcpy#include #include /** * Copy 16 bytes from one location to another using optimised SSE * instructions. memcpy() certainly would involve the bus, and likely the CPU as well memcpy() copies values from one location to another within a single process, so both the source memory and target memory locations exist within a single address space. Maximize performance. 2) HTTP server not up after patching database 10. Hi, ich habe folgendes Problem: sys-libs/libstdc++-v3-3. On Linux with open source radeon drivers on a R3 370, glBufferData() brought about 15% performance increase. And I really don't see the downside. The library memcpy is single threaded and tends to be incredibly complicated, as it tries to optimize aligned and non-aligned cases for different architectures and CPU models. It seems it's not correct to tell about memcpy as is without specific target platforms and compilers. None the less, sometimes (on a very fast pipelined processors, for example) it's useful to implement mem copy loop with the target processors word (or even double word) elements (with previous loop counter calculations and proper pointers casting). On my desktop PC with a much faster Intel Core i7-3930K CPU (3. GitHub Gist: instantly share code, notes, and snippets. Nowadays, the fastest program is the one that can use as many CPU features as possible in parallel. 4 GHz Intel Xeons MCR's procurement was intended to significantly increase the resources available to Multiprogrammatic and Institutional Computing (M&IC) users. But now when I use in a program, I get the following errors. I wrote a program which iterates through all possible parameters for the glXAllocateMemoryNV call (in 0. Thu Mar 29 2018 Krzysztof Czurylo This is the first release of PMDK under a new name. This compiler tech kicks ass and I hope Intel keeps throwing resources at it. Fix bug #65: MatrixBase::nonZeros() was recursing infinitely Fix PowerPC platform detection on Mac OSX. Throughout the text the rounded median runtimes on a Intel (R) Core (TM) i7-6600U CPU @ 2. net Try without setting your own CFLAGS, etc. Someone from the Rust language governance team gave an interesting talk at this year's Open Source Technology Summit. In C there has always been memcpy Discussion Comet Lake Intel's new Core i9-10900K runs at over 90C,. Summary: This release adds support for pluggable IO schedulers framework in the multiqueue block layer, journalling support in the MD RAID5 implementation that closes the write hole, a more scalable swapping implementation for swap placed in SSDs, a new statx() system call that solves the deficiencies of the existing stat(), a new perf ftrace. And while the PC market has shrunk it's still 270 million PCs/year or about 75% of its all time high, it's a huge market even if it's not a growth market anymore. If you don't have that then there's really nothing you can do. I compiled MySQL with newest ICC 8. linking error: undefined reference to `_intel_fast_memcpy' Post here if you have a question about linking your program with LAPACK or ScaLAPACK library 2 posts • Page 1 of 1. I’m not sure exactly what the problem might be, but can you try: – Setting the project language level to Java 8 (check it’s set to 8 in every module too – because Morphia uses Gradle, and Gradle sets the language level to 6, this means IntelliJ tends to set the language level to 6 on each of the individual modules, overriding the project level). Oracle Database - Enterprise Edition - Version 10. out (gdb) watch a. The best deals on computers, computer parts, desktops, laptops, electronics, tablets, software, gaming, hard drives, CPUs, motherboards and much more. Debian bug tracking system. Intel processors have been a major force in personal computing for more than 30 years. Nowadays, the fastest program is the one that can use as many CPU features as possible in parallel. This article describes a fast and portable memcpy implementation that can replace the standard library version of memcpy when higher performance is needed. More Information. Using normal stores/loads only requires a trip to L3 cache, not to DRAM, for communication between threads on Intel CPUs. xml-sitemaps. 35 x86 Built-in Functions. The program should now link without missing symbols and you should have an executable file. If u have user id on metalink, use that. ORA-07445: caught exception [ACCESS_VIOLATION] at [_intel_fast_memcpy. 469252 s with simple MOVUSB (no prefetch) 0. 56 times faster than memcpy() on MSVC++2017 compiler. Release summary: - Stability and regression fixes. Why GitHub? Features →. 4 64Bit数据库:oracle 10. For cheap-to-copy objects, Duff's Device might perform faster than a simple for loop. –Memcpy recognition ‡ (call Intel’s fast memcpy, memset) –Loop splitting ‡ (facilitate vectorization) –Loop fusion (more efficient vectorization) –Scalar replacement‡ (reduce array accesses by scalar temps) –Loop rerolling (enable vectorization) –Loop peeling (allow for misalignment). > `_intel_fast_memcpy' follow is this necessary to remove the old compiled files, if necessary does amber has some script to clean this files?. Intel developer support, he claims, said the code was optimised for the Pentium 4 and the other code was the simplest implementation for older CPUs, such as the PIII. Doing HPS signal processing on the data while stored in sdram is a bit slow, so to increase the signal processing speed the 8 kBytes data is copied into an array using memcpy. org, torvalds-AT-linux-foundation. 999 and a fast rate 0. 0 fails (Doc ID 579063. Jan 27, 2018 · If the array contains type which is TriviallyCopyable, it calls memmove(), else it calls the assignment operator. Its competitor, memcpy, is simpler, better-supported, easier to debug, and is sometimes even faster. In fact I attached a pdf file for the config log. (Note that Pentium III processors may incur a penalty since the L2 cache runs at half the speed of the processor core and L1. I/O at 0xe800. OK # Monitor. It goes from 2-8 times slower than imlib2 to 1. 49 189 * Fast way when copy size doesn't exceed 512. Now i want to. However, that does not help with the question. 40GHz (SSE4)----- aligned strings --498064 cycles - 10 ( 0) 0: crt_memcpy. CPU overhead is low, but. Using the memcpy. Optimizing too much for high-end Intel CPUs?! Low-end OpenWRT router boxes is large market ARM based Android devices also run our network stack Smaller devices characteristics I-cache size comparable to Intel 32KiB, but no smart prefetchers, and slower access D-cache sizes significantly smaller e. unlike with fortran, gcc is quite competitive and occasionally ahead of , and since you cannot use KOKKOS and USER-INTEL (the latter of which benefits a lot from using the intel compiler) at the same time, there really is not much of a reason to switch away from gcc. undefined symbol: _intel_fast_memcpy mozilla/DeepSpeech#2752. Release summary: - Stability and regression fixes. Even my slower timing is in the uptime of a typical server. Sets the first num bytes of the block of memory pointed by ptr to the specified value (interpreted as an unsigned char). The poster claims Intel's assembly code for the memcpy command was clearly designed to be less efficient on non-Intel processors than the company's own chips. Introduction. 1 on optimization level 2. To improve performance, more recent processors support modifications to the processor’s operation during the string store operations initiated with MOVS and MOVSB. The 8080 was an extension and enhancement of the Intel 8008, which in turn was an LSI implementation of the TTL-based CPU design used in the Datapoint 2200. On EEMBC benchmarks—the most widely accepted benchmarks in the embedded industry—the Green Hills Compilers consistently outperform competing compilers to generate the fastest and smallest code for 32- and 64-bit processors. If you're not running on an Intel platform, it will not work. Drinks & bbq. ORA-07445: exception encountered: core dump [ACCESS_VIOLATION] [___intel_new_memcpy+40] [PC:0x268F3C8] [ADDR:0x14] [UNABLE_TO_WRITE] [] Current SQL statement for this session: SQL query. If you use the gcc compiler to link your application or if you directly call the linker, ld, you might find. 35 x86 Built-in Functions. GCC, Intel C++, MSVC 11 beta), does the following code produce vectorized instructions: memcpy(str, s. Intel failed to use Intel's own documented way to detect SSE, but rather enabled SSE only for Intel parts. Major partners and customers Foreign partners: Microsoft Research, Intel Labs, Nokia, Google, ETRI,. My benchmarks will run on a Lenovo ThinkPad running Windows 10, with an Intel i5-7200U and 8GB of RAM. > `_intel_fast_memcpy' follow is this necessary to remove the old compiled files, if necessary does amber has some script to clean this files?. Hi, ich habe folgendes Problem: sys-libs/libstdc++-v3-3. Here's what I found: For small values of N, (less than 2000 or so), Algorithm A is fastest, irrespective of the value of n. Excellet step by step troubleshooting tip. About The Internet Of Things “The Internet of Things is the network of physical objects that contain embedded technology to communicate and sense or interact with their internal states or the external environment. OBSOLETE: API-Review is now defined in All-Projects refs/meta/config rules. Therefore, software mode cannot be avoided. Its competitor, memcpy, is simpler, better-supported, easier to debug, and is sometimes even faster. On EEMBC benchmarks—the most widely accepted benchmarks in the embedded industry—the Green Hills Compilers consistently outperform competing compilers to generate the fastest and smallest code for 32- and 64-bit processors. Applies to: Oracle Database - Enterprise Edition - Version 10. With better memcpy implementation you can virtually always beat assignment operator. Interesting to find out the memcpy is faster with no optimization turned on. A]的错误。 以前碰到过几次的memcpy有关的错误. 0 fails (Doc ID 579063. Why is memcpy() and memmove() faster than pointer increments? (6) memcpy can copy more than one byte at once depending on the computer's architecture. Backup files are then transferred directly to the cluster nodes where shards are located, and the data is subsequently loaded in parallel in the most optimal way. memcpy() is usually a bit faster than memmove(), but that difference is more significant with smaller n and #1 above suggest only using memcpy()/memmove() when n is large. instruction set is used by most microprocessors from Intel, AMD, and VIA. 4 GHz Intel Xeons MCR's procurement was intended to significantly increase the resources available to Multiprogrammatic and Institutional Computing (M&IC) users. Cortex-A76 brings the always-on ease of mobile to large-screen compute, delivering laptop-class performance with mobile efficiency. The manual covers the newest microprocessors and the newest instruction sets. The direct read/write to SDRAM slows down. Using the memcpy. Actual performance for the memcpy example remains at 160-165 MB/s when prefetches are done to the non-temporal cache structure (prefetchnta), L0, L1, and L2 (prefetcht0), L1 and L2 (prefetcht1), or L2 only (prefetcht2). If you use the gcc compiler to link your application or if you directly call the linker, ld, you might find. 5% faster than 32-bit version (2700 vs. Interactive Session Starts • If you want to experiment with Blosc in your own machine:. |+)*(\\(二种同时存在一种\\))+, i) 第一次可以执行,第二次执行报ORA-7445,session 中断。. Doing HPS signal processing on the data while stored in sdram is a bit slow, so to increase the signal processing speed the 8 kBytes data is copied into an array using memcpy. On my desktop PC with a much faster Intel Core i7-3930K CPU (3. (Its official name is “4th generation Intel® Core™ processor family”). The feed handlers, which accept the data in various formats, can be multithreaded and take advantage of coprocessors such as the Intel Xeon Phi. 49 189 * Fast way when copy size doesn't exceed 512. On Ryzen 1800X with single memory channel filled completely (2 slots, 16 GB DDR4 in each), the following code is 1. org, akpm-AT-linux-foundation. Delete/Select From Oracle Designer Against Oracle 10. [] Partial specializationThe standard library provides partial specializations of the std::atomic template for the following types with additional properties that the primary template does not have:. Quarantine zone is a temporal-protection feature of AddressSanitizer and, in principle, it gives an unfair advantage to Intel MPX which lacks this kind of protection. About The Internet Of Things “The Internet of Things is the network of physical objects that contain embedded technology to communicate and sense or interact with their internal states or the external environment. Which means self_exec_id is simply a speed bump today, and if exec gets noticably faster self_exec_id won't even be a speed bump. Then i did a memcopy in the other direction (from application buffer to IMediaSample buffer) -> About 1nanoseconds/byte Then i did a test memcpy (from application to application buffer) -> About 1nanoseconds/byte, it is 100 times faster. 1]: ORA-07445 [ACCESS_VIOLATION] [_intel_fast_memcpy. That can be at a faster rate than it can be recorded to file (resulting in trace data loss), and sometimes faster even than can be recording to memory (resulting in overflow packets). In following years, however, the CMOS Z80 would dominate this market. The latter produced only 835fps. • More or faster links between processors (e. rep movsd and rep stosd. Increasing/decreasing this value may improve performance. 00 _intel_fast_memcpy. "memcpy" just copies memory. 9 through 10. Do not expect significant difference in using either of these functions when combined with step #1. If you do use GL_BGRA, the call to pixel transfer will be much faster. Intel's C compiler is the best you can get (at least if you can trust it). This has been reported to work on a machine similar to mine on the Arch Users Form. (Note that Pentium III processors may incur a penalty since the L2 cache runs at half the speed of the processor core and L1. In the first stage, the corresponding BD entry has to be loaded. Bottleneck tasks such as JSON ingestion can be much faster than they currently are. /configure_at icc. Optimizing too much for high-end Intel CPUs?! Low-end OpenWRT router boxes is large market ARM based Android devices also run our network stack Smaller devices characteristics I-cache size comparable to Intel 32KiB, but no smart prefetchers, and slower access D-cache sizes significantly smaller e. > Ok for trunk?. 35 x86 Built-in Functions. Delete/Select From Oracle Designer Against Oracle 10. The naive handmade memcpy is nothing more than this code (not to be the best implem ever but at least safe for any kind of buffer size):. memcpy you do movsw (words, 2 bytes), faster than movsb (byte). Download Code Sample Introduction Memcpy is an important and often-used function of the standard C library. The Performance Scaled Messaging (PSM) API is Intel's low-level user-level communications interface for the Intel(R) True Scale Fabric family of products. Why GitHub? Features →. 542820 s +10/+13 cruelly unaligned blocks libc memcpy 0. Different tiers of objects (hot, cold) can be identified 2. s call _intel_fast_memcpy #11. 【Link】undefined reference to `_intel_fast_memcpy' when using intrinsics. The Intel C++ Compiler uses two routines _intel_fast_memcpy and _intel_fast_memset to perform memcpy and memset operations that are not macro expanded to __builtin_memcpy and __builtin_memset in the source code. Bus 0, device 7, function 0: ISA bridge: Intel 82371SB Triton II PIIX (rev 0). x (gdb) r Starting program:. Subject: Re: Fast memcpy(3) making use of MMX instructions To: None From: Andreas Persson List: tech-perform Date: 08/20/2001 16:44:52 On Mon, Aug 20, 2001 at 09:58:03PM +0900, Bang Jun-Young wrote: >>From the results: > - Utilizing MMX for memcpy gives _no_ gain on Intel processor. NIT: There are a lot of memory copyies with for loops rather than PORT_Memcpy (which NSS #defines to the OS memcpy, which is often a compilier intrinsic). 537064cpB 5. 6 [Release 10. Maybe I've been asleep at the wheel, but I'm curious which implementations of memcpy() knows all the grubby details and actually uses them?. exe CityHash128 CityHash64 SpookyHash xxhash xxhash256. 848712] Code: 48 c7 c0 f0 cb 43 99 48 0f 44 c2 41 50 51 41 51 48 89 f9 49 89 f1 4d 89 d8 4c 89 d2 48 89 c6 48 c7 c7 38 cc 43 99 e8 a2 50 e4 ff <0f> 0b 48 83 c4 18 c3 48 c7 c6 63 cb 44 99 49 89 f1 49 89 f3 eb [ 12. Flame Graph Reset Zoom. I've profiled it with the AMD memcpy, and it seems to be slightly slower. Alternatively, using 16 _mm256_store_si256 operations in. We also used Intel Compiler 7. linking error: undefined reference to `_intel_fast_memcpy' by hubloads » Thu Apr 25, 2013 9:52 pm. The benchmark will be run on a Dell XPS 9560, 2. 2 fps average / 106 points score compares to 4. memcpy() normally knows all sorts of grubby details about properties of memory addresses; if the addresses are suitably aligned, memcpy() will normally use the more efficient implementation anyway. 40GHz stepping : 13 cpu MHz : 1200. , 100 000 clock cycles). A well implemented memcpy() can use many tricks to accelerate its operation. Now the signal processing is much faster, but the memcpy "penalty" is high: Transferring the 8 kBytes of data takes 500 us = 16 Mbytes/s using the compile flag O0, O2. Intel processors have been a major force in personal computing for more than 30 years. Delete/Select From Oracle Designer Against Oracle 10. you can find out the cause of ora ORA-07445 and ORA-600 errors on metalink by ORA-07445 debugging tool. the target processor support: - lfd/stfd instructions and floating point support is ON. Both of those dgemm kernels are much, much faster than the standard C BLAS. A thread is spawned by defining a function and its arguments which will be processed in the thread. So maybe we can go even faster. Different tiers of objects (hot, cold) can be identified 2. It achieves fast auto-cluster recovery by rebuilding the cluster from scratch from the config file, maintaining the same endpoints and database configurations. All content and materials on this site are provided "as is". -To unsubscribe from this list: send the line "unsubscribe linux-kernel" in. So does device-dax, but device-dax lacks read(2)/write(2). These are found in libirc. ngx_process_events_and_timers. If u have user id on metalink, use that. •Continue the load with some data to reach the retirement stage. The read and write functions are defined to be ordered. With this extension the read and draw surfaces can be NULL. We used default settings for all the. For that, I am using 16 _mm256_load_si256 intrinsincs operations (on ymm0-15) followed by 16 _mm256_stream_si256 operations (same ymm registers). When you see RAM with speeds rated over this, it means the module has been overclocked to that speed by the manufacturer. Intel's large inclusive L3 cache works as a backstop for cache-coherency traffic. exe CityHash128 CityHash64 SpookyHash xxhash xxhash256. And with this piece of code you do movsd (double words, 4 bytes), which is the fastest way (except a good coded JNZ). Jan 27, 2018 · If the array contains type which is TriviallyCopyable, it calls memmove(), else it calls the assignment operator. FBT created probes for the implementation functions, but we needed some extra support to ensure that fbt::memcpy:entry continues to work as expected. As a rule of thumb, it's generally good to use memcpy (and consequently fill-by-copy) if you can — for large data sets, memcpy doesn't make much difference, and for smaller data sets, it might be much faster. By default, the maximum stock clock speed for DDR4 RAM is 2400 MHz. , memcpy may use as little as 0. Unlike the 68-point landmarking model included with dlib, this model is over 10x smaller at 8. Projects 1 closed project. I just bought the HP Envy x360 which has a 6 core AMD Ryzen 5 4500U. It seems that the memory-to-memory copy should be fast enough to support 3GB/sec on the hardware that I am running on. And main question still not answered - if declaring curWriteNum as volatile is enough on modern Intel Xeon processor? I'm using 2 phisical processors server BTW. Please help me the find out the solution. The PCI of a GT200-based GPU works only in singlex mode. 1 Faster, Scalable, More Reliable I/O Intel QuickData Technology is a component of Intel? I/O Acceleration Technology (Intel? I/OAT). I've profiled it with the AMD memcpy, and it seems to be slightly slower. •Upon an Exception/Fault/Assist on a Load, Intel CPUs: •Execute the load until the last stage. New programming languages commonly use C as their reference and they are really proud to be only so much slower than C. rep movsd and rep stosd. Well, i got a problem. •By applying RDMA ideally, all 4 memcpy per communication will be reduced, but this is out of scope in this work due to very high implementation cost 2. A()+10] [SIGSEGV] [Address not mapped to object] [0x2B19A446E2F7] [] [] Thanks. We do not expect base64 decoding to be commonly a bottleneck in Web browsers. The memcpy() routine in every C library moves blocks of memory of arbitrary size. 5 GHz i-7 CPU. allocate_unique proposed in P0211 would be required to invent the deleter type D for the unique_ptr it returns which would contain an allocator object and invoke both destroy and deallocate in its operator(). Closed Sign up for free to join this conversation on GitHub. 1) Last updated on FEBRUARY 14, 2020. I encountered some performance anomalies while doing so and, after much experimentation,. Fast memcpy with SPDK and Intel® I/OAT DMA Engine. NVStreamI/O scales well with increasing ranks. Intel's large inclusive L3 cache works as a backstop for cache-coherency traffic. It’s also why programs built for x86/x64 can’t run in ARM. memcpy() certainly would involve the bus, and likely the CPU as well memcpy() copies values from one location to another within a single process, so both the source memory and target memory locations exist within a single address space. Though something similar may apply for ARM/AArch64 with SIMD. I ran the benchmarks on an Intel Core i7-2600K @ 3. Both of those dgemm kernels are much, much faster than the standard C BLAS. Add to that it had low adoption (not many vendors implemented a NetDMA provider), and the value of keeping the feature wasn't there. Bus 0, device 7, function 1: IDE interface: Intel 82371SB Triton II PIIX (rev 0). Flame Graph Reset Zoom Search. Comment 8 Matt Turner 2015-03-04 20:45:24 UTC Yeah, sounds like (b) is a good option. It is a C library function, but often for short copies with known length it is inlined by the compiler and won’t even show up as a separate function. you can find out the cause of ora ORA-07445 and ORA-600 errors on metalink by ORA-07445 debugging tool. 848712] Code: 48 c7 c0 f0 cb 43 99 48 0f 44 c2 41 50 51 41 51 48 89 f9 49 89 f1 4d 89 d8 4c 89 d2 48 89 c6 48 c7 c7 38 cc 43 99 e8 a2 50 e4 ff <0f> 0b 48 83 c4 18 c3 48 c7 c6 63 cb 44 99 49 89 f1 49 89 f3 eb [ 12. In the code below the 8x memcpy_dma is significantly faster than wrapping it all in one single dma call. As well as AVX2, Haswell supports other features to help make your code run faster: FMA (Fused Multiply Add) and BMI (Bit Manipulation Instructions), in particular. Access to shared memory is much faster than global memory access because it is located on chip. Backup files are then transferred directly to the cluster nodes where shards are located, and the data is subsequently loaded in parallel in the most optimal way. /configure --prefix=/usr/local/php --with-apxs2=/usr/local/apache/bin/apxs --with-mysql=/usr/local/mysql --enable-module=so --enable-cli --with-zlib-dir=/usr/include. Why is memcpy() and memmove() faster than pointer increments? (6) memcpy can copy more than one byte at once depending on the computer's architecture. Speed-up over 50% in average vs traditional memcpy in gcc 4. A critical stage for playing DVDs. The best deals on computers, computer parts, desktops, laptops, electronics, tablets, software, gaming, hard drives, CPUs, motherboards and much more. * Added a new callback for FFDShow’s internal decoders – EndFlush. In this sense, STREAM VBYTE establishes new speed records for byte-oriented integer compres-sion, at times exceeding the speed of the memcpy function. The interesting part is to run this test on a x86 and x64 mode. Such a driver could identify that you're rendering a full-screen quad without depth testing, etc. Note: All the benchmarks discussed in this blog are single. A well implemented memcpy() can use many tricks to accelerate its operation. 00719GB/s 128MB 0. It goes from 2-8 times slower than imlib2 to 1. faster than PMFS at 64 MPI ranks for GTC and. I've profiled it with the AMD memcpy, and it seems to be slightly slower. Just compile with SHA2_UNROLL_TRANSFORM to enable. So when 10nm on the desktop finally gives Intel the thermals to put AVX-512 on the desktop, I've been expecting that Intel will take over the lead from AMD (although, as with the earlier. SE Department staff: over 40 researchers and engineers, including 3 Doctors of Sc. What is it?¶ Blosc is a high performance compressor optimized for binary data (i. CREATE_QUEUE_TABLE (Doc ID 1900044. For more complicated objects it can be hundreds of times faster, though. 3\src>main_Intel_12. It is guaranteed to be a standard layout struct. The memcpy() call on line 7 is also protected by an explicit range check on line 6 that tests both the upper and lower bounds. By default, the maximum stock clock speed for DDR4 RAM is 2400 MHz. Code review; Project management; Integrations; Actions; Packages; Security. Well, i got a problem. Applies to: Oracle Database - Enterprise Edition - Version 10. multi-threaded Intel MKL, or OpenBLAS) A sophisticated expression evaluator (based on template meta-programming) automatically combines several operations to increase speed and efficiency. The code was compiled with MSVC version 19. > Ok for trunk?. PMDK is vendor-neutral, started by Intel, motivated by the introduction of Optane DC persistent memory. Our current best disk can read data at speeds of gigabytes per second; the best networks are even faster. Someone from the Rust language governance team gave an interesting talk at this year's Open Source Technology Summit. The Intel® Intelligent Storage Acceleration Library (Intel® ISA-L) is a collection of optimized low-level functions used primarily in storage applications. Code is faster and more robust. –Memcpy recognition ‡ (call Intel’s fast memcpy, memset) –Loop splitting ‡ (facilitate vectorization) –Loop fusion (more efficient vectorization) –Scalar replacement‡ (reduce array accesses by scalar temps) –Loop rerolling (enable vectorization) –Loop peeling (allow for misalignment). C++ Shell, 2014-2015. The purpose of using the POSIX thread library in your software is to execute software faster. June 25, 2010 1 Comment. This is exactly the code I had in mind when writing the function. Based on some not very comprehensive tests of LLVM’s clang (the default compiler on macOS), GNU gcc, Intel’s compiler (icc) and MSVC (part of Microsoft Visual Studio), only clang makes aggressive use of 512-bit instructions for simple constructs today: it used such instructions while copying structures, inlining memcpy, and vectorizing loops. This forced Intel C++ to use the “Pentium 4” memcpy regardless of which processor in in the machine. Fast parallel image registration on CPU and GPU for diagnostic classification of Alzheimer's disease Denis P. PBO is not introduced until OpenGL ES 3. (Its official name is “4th generation Intel® Core™ processor family”). Does memcpy() qualify for step 3? SO…when I do all of this, I am able to EITHER get fast glTexSubImage2D performance, OR fast memcpy performance, but not both. So a slow rate of decay would be 0. Without arch-specific support, this defaults to just memcpy(). Lelieveldt , 1, 3 Marion Smits , 4 Stefan Klein , 2 Marius Staring , * and for the Alzheimer's Disease Neuroimaging Initiative †. I guess nothing can be faster than memcpy so I prefer to keep using it even loosing readability. [UNABLE_TO_READ] (Doc ID 560321. Both tests are running on the same Windows 7 OS x64, same machine Intel Core I5 750 (2. The Intel 8080 ("eighty-eighty") is the second 8-bit microprocessor designed and manufactured by Intel. Do not expect significant difference in using either of these functions when combined with step #1. 552512cpB 5. The purpose of using the POSIX thread library in your software is to execute software faster. For now, include arch-specific support for x86. 0, which is available since Android 4. The "sse" implementation is competetive to (and, on Zen, faster than) glibc's memcpy (which also uses SSE AFAIK), and it weighs in at 202 bytes (when compiled with gcc-4. I added the memory info above (below the lsmod output). you have all 4 DDR4 slots busy, you may. Open-source electronic prototyping platform enabling users to create interactive electronic objects. I do all the video rendering in it's own thread though. Nowadays, the fastest program is the one that can use as many CPU features as possible in parallel. Well, i got a problem. memcpy() certainly would involve the bus, and likely the CPU as well memcpy() copies values from one location to another within a single process, so both the source memory and target memory locations exist within a single address space. Though something similar may apply for ARM/AArch64 with SIMD. Please see the introduction to Debian mailing lists for more information on what they are and how they can be used. Multiple threads can reach about twice the bandwidth on our cluster. system habe ich schon mehrmals mit "emerge -e system" neu übersetzt - bei libstdc++-v3 bricht emerge mit der Fehlermeldung ab. Memcpy recognition ‡ (call Intel’s fast memcpy, memset) Loop splitting ‡ (facilitate vectorization) Loop fusion (more efficient vectorization) Scalar replacement‡ (reduce array accesses by scalar temps) Loop rerolling (enable vectorization) Loop peeling ‡ (allow for misalignment). It goes from 2-8 times slower than imlib2 to 1. Marco Yu shared the superscalar version with me on April 3, 2007 and alerted me to a typo 2 days later. It’s been a long time since I learned assembly language and decades since I taught it, so take what I say here with a grain of salt - it may be a. For example, on Intel Silvermont, PSHUFB costs 5 cycles, whilst it’s 1 on all Core i3/i5/i7 and most AMD CPUs. Glenn Slayden informed me of the first expression on December 11, 2003. Performance measurement is done on an Intel® system with preproduction Intel Xeon Scalable processors running at 2. Hi: I am new at lapack/scalapack and doing something terribly wrong while compiling or linking to my fortran 90 codes and getting a long list of errors. If you're not running on an Intel platform, it will not work. Update2 I've managed to further optimize the copy function. Hi, From the alert log file. PORT_Memcpy should be both faster and more readable than a for loop copying byte at a time. Fast back-to-back capable. People who are concerned with stability and reliability should stick with a previous release or wait for Mesa 19. The hardware has to be good at it for x86 to run fast. Oracle Database - Enterprise Edition - Version 10. Now i want to compile Php with GCC 4 using the MySQL Lib and i get this:. In this article I will ground the discussion on the several aspects of delivering a modern parallel code using the Intel® MPI library, that provides even more performance speed-up and efficiency of the parallel “stable” sort, previously discussed. The advantage of this construct is that you can use the flags set by the increment to test for loop termination, rather than needing an additional comparison. It’s also why programs built for x86/x64 can’t run in ARM. If you like Oracle tuning, see the book "Oracle Tuning: The Definitive Reference", with 950 pages of tuning tips and scripts. Using ifuncs to decide the fastest memcpy for each particular CPU is better than inlining a generic implementation and being stuck with that until you recompile. ldaprc(5) - LDAP configuration file. So, let's see the details. 93789GB/s 64MB 0. AVX2 shipped with Intel’s latest processor micro-architecture, codenamed “Haswell“. The library memcpy is single threaded and tends to be incredibly complicated, as it tries to optimize aligned and non-aligned cases for different architectures and CPU models. The "sse" implementation is competetive to (and, on Zen, faster than) glibc's memcpy (which also uses SSE AFAIK), and it weighs in at 202 bytes (when compiled with gcc-4. 6 is mostly a stability release. * Enhanced FFDShow’s code with a faster memcpy function (SSE2 based). A Computer Science portal for geeks. I do all the video rendering in it's own thread though. memmove took 1. If you've searched around the web trying to find. There are list indices for the following types of mailing lists:. intel_new_memcpy intel_fast_memcpy evanvl evaopn2 qersoSORowP Changes This can be triggered by running a query involving complex view merging and an aggregation function on top of the ROWID column. 5x for both PARSEC and SPEC, although the performance overhead is not influenced. On EEMBC benchmarks—the most widely accepted benchmarks in the embedded industry—the Green Hills Compilers consistently outperform competing compilers to generate the fastest and smallest code for 32- and 64-bit processors. 5% faster than 32-bit version (2700 vs. Jim Dempsey. Code: decompression linux-2. Topic Posted By Date; Cortex-A72 Technical Reference Manual: Ronald Maas: 2015/03/05 08:01 AM Cortex-A72 Technical Reference Manual: dmcq: 2015/03/05 11:01 AM. The Intel version of TenFourFox may run on these machines, though it will be rather less advanced, and of. Because shared memory is shared by threads in a thread block, it provides a mechanism for threads to cooperate. Games are definitely a bad use-case of AVX512, and are the worst thing to use it with. Thu Mar 29 2018 Krzysztof Czurylo This is the first release of PMDK under a new name. Lelieveldt , 1, 3 Marion Smits , 4 Stefan Klein , 2 Marius Staring , * and for the Alzheimer's Disease Neuroimaging Initiative †. ngx_process_events_and_timers. However, currently Eigen parallelizes only general matrix-matrix products ( bench ), so it doesn't by itself take much advantage of parallel hardware. This is not a statement that interleaved is best under all circumstances. 1] -----版权所有,文章允许转载,但必须以链接方式注明源地址,否则追究法律责任! QQ:492913789. If u have user id on metalink, use that. The poster claims Intel's assembly code for the memcpy command was clearly designed to be less efficient on non-Intel processors than the company's own chips. pull Reduced overhead Parameter Server worker 2. Rewrite 4x4 matrix inverse to improve precision, and add a new unit test to guarantee that precision. For example, in MSVC. Jump to letter:. memcpy() normally knows all sorts of grubby details about properties of memory addresses; if the addresses are suitably aligned, memcpy() will normally use the more efficient implementation anyway. 03 cycles per byte while a fast base64 decoder might use 1. Lorg/apach. It's used quite a bit in some programs and so is a natural target for optimization. If you don't want to bother with threading it through the tiled_memcpy code, I can do that part quick enough. execute the binary by connecting to daemon(nc 0 9022). From:: Greg Kroah-Hartman To:: linux-kernel-AT-vger. vfs_write (2,951 samples, 0. Persistent Memory (such as Intel Optane DC Persistent Memory) blurs the line between storage and memory by being both byte addressable as well as persistent. Cortex-A76 brings the always-on ease of mobile to large-screen compute, delivering laptop-class performance with mobile efficiency. MPICH_MAX_SHORT_MSG_SIZE tune the use of the eager messaging protocol which tries to minimise the use of the MPI system buffer. For initial synchronization driver still uses memcpy(), since it is easier. Thus, by overlapping computation and data transfers in streamed data processing, two GPUs can average 9. clang++はmemcpyを呼ぶスレッショルドが変わり、icpcは-O1以下だとそもそもmemcpyを使わず、-O2以上だと N=33以上で _intel_fast_memcpyを呼ぶみたい。 まとめ memcpyが呼ばれるとgdbのウォッチポイントでソースの行数がわからなくなる場合があり、構造体のコピーでmemcpyが. IOW each line in an assembler source corresponds. For smaller sizes you will still get vector-code, but it will not use non-temporal stores. multi-threaded Intel MKL, or OpenBLAS) A sophisticated expression evaluator (based on template meta-programming) automatically combines several operations to increase speed and efficiency. –memcpy + clflush/clwb for write –memcpy for read –fallocate + mmapfor extending file space •Pros –Bypass file system overhead (e. It achieves fast auto-cluster recovery by rebuilding the cluster from scratch from the config file, maintaining the same endpoints and database configurations. The average of Cycles Per Instruction in a given process is defined by the following: = () Where is the number of instructions for a given instruction type , is the clock-cycles for that instruction type and = is the total instruction count. The latter produced only 835fps. shot up to over 5x vs. 1] Generic Windows *** Checked for relevance on 12-Jul-2012 ***. Intel® C++ Compiler (ICC) Intel® C++ Compiler (ICC) is a group of C and C++ compilers from Intel available for Windows, Linux, and Intel-based devices. vdb / vtrace. So when 10nm on the desktop finally gives Intel the thermals to put AVX-512 on the desktop, I've been expecting that Intel will take over the lead from AMD (although, as with the earlier. memcpy() is usually a bit faster than memmove(), but that difference is more significant with smaller n and #1 above suggest only using memcpy()/memmove() when n is large. However, I feel I am not utilising the fact that my copying operations are always the same size. My first response is: “Don’t! Save yourself the pain”. The figures below show the performance improvement, in percent, of the mmap branch relative to develop for the 19 benchmarks where mmap made a difference. Well, i got a problem. PBO is not introduced until OpenGL ES 3. The "sse" implementation is competetive to (and, on Zen, faster than) glibc's memcpy (which also uses SSE AFAIK), and it weighs in at 202 bytes (when compiled with gcc-4. Generate faster, smaller code Green Hills optimizing compilers are the best on the market. MPICH_COLL_OPT_ON. For that, the CPU: (1) extracts the offset of BD entry from bits 20–47 of the pointer address and shifts it by 3 bits (since all BD entries are 2 3 bits long), (2) loads the base address of BD from the BNDCFGx (in particular, BNDCFGU in user space and BNDCFGS in kernel mode) register, and (3) sums the base and the offset and. std::_Hashtable 256K. Specifically, users claim local arrays in the code. I've also installed intel-ucode on the host and done the Intel INF update on the guest to no avail. LLVM is a Static Single Assignment (SSA) based representation that provides type safety, low-level operations, flexibility, and the capability of representing ‘all’ high-level languages cleanly. None the less, sometimes (on a very fast pipelined processors, for example) it's useful to implement mem copy loop with the target processors word (or even double word) elements (with previous loop counter calculations and proper pointers casting). 3 optimized with Intel MKL-DNN gives 14x better inference throughput on a dual-socket Intel® Xeon® Platinum 8280 processor and 30x better inference throughput on a dual-socket Intel Xeon Platinum 9282 processor, in comparison to the previous-generation Intel Xeon Scalable processors 11. Code review; Project management; Integrations; Actions; Packages; Security. Was könnte ihn dazu bewegen _intel_fast_mem* zu benutzen und wie verhinder ich das?. ARM’s RVDS compiler typically generates code that is upto 2x faster than any other C compiler for ARM, but on most ARM devices, hand-written Assembly code can often be 10x faster! (Assuming you use SIMD vectorization such as ARM’s NEON Media Processing Engine or Intel’s MMX/SSE/AVX). 3\src>main_Intel_12. The figures below show the performance improvement, in percent, of the mmap branch relative to develop for the 19 benchmarks where mmap made a difference. Intel® QuickData Technology enables data copy by the chipset instead of the CPU, to move data more efficiently through the server and provide fast, scalable, and reliable throughput. SELECT value FROM t4 WHERE key = ? Reset Zoom Search. This defines the texture's image format; the last three parameters describe how your pixel data is stored. rep movsd and rep stosd. 2 Running on a Mac from 2014 wth an Intel processor and compiling with Clang, the non-SIMD trick actually ran slower than the naive loop. Various matrix decompositions are provided through integration with LAPACK, or one of its high performance drop-in replacements (eg. statNolog (133 samples, 0. Unfortunately, software compiled with the Intel compiler or the Intel function libraries has inferior performance on AMD and VIA processors. Code: decompression linux-2. GCC, Intel C++, MSVC 11 beta), does the following code produce vectorized instructions: memcpy(str, s. memcpy函数即从源地址向目的地址复制一块数据,利用SIMD对其优化有很好的效果。 如普通汇编指令 mov eax,ebx一次能复制两个字节的数据,而MMX指令 movq mm1,mm2可以复制8个字节的数据,mm1,mm2分别为MMX指令寄存器为64位,而SSE指令movdqa xmm1,xmm2一次复制16个字节!. • More or faster links between processors (e. 1] Generic Windows *** Checked for relevance on 12-Jul-2012 ***. 1GHz, in a 2-socket configuration with 24x 2666MHz DIMMs. #define USE_FAST_MEMCPY 1. DataPump Import (IMPDP) Fails With ORA-7445[_INTEL_FAST_MEMCPY. I have implemented a SSE4. This is presumably because the faster CPU (and chipset) reduces the host-side memory copy cost. 8x speedup over the raw HLS code. •By applying RDMA ideally, all 4 memcpy per communication will be reduced, but this is out of scope in this work due to very high implementation cost 2. vanilla: 679 calls to memcpy vmlinux. So the new implementation is about 5 times faster than the old version, and about a salt faster than FreeBSD's memcpy (which is implemented in Assembler language but works on integer alignment). - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] Debian has a bug tracking system (BTS) in which we file details of bugs reported by users and developers. -To unsubscribe from this list: send the line "unsubscribe linux-kernel" in. Nowadays, the fastest program is the one that can use as many CPU features as possible in parallel. Intel failed to use Intel's own documented way to detect SSE, but rather enabled SSE only for Intel parts. Someone from the Rust language governance team gave an interesting talk at this year's Open Source Technology Summit. Is volatile enough and mandatory?. Here's the unameoutput, for anyone interested. Agner Fog's 64bit memcpy. For 64-bit applications, branch prediction performance can be negatively impacted when the target of a branch is more than 4GB away from the branch. Therefore, software mode cannot be avoided. The "avx" implementation produces the best results at most block sizes on the Intel chips, and also costs 202 bytes of code (plus 64 bytes of. Make sure you have taken backups of all Oracle homes and Oracle Inventory. I don't use any virtualization it's a standard Debian directly on the hardware (AMD Athlon(tm) 64 X2 Dual Core Processor 6000+). 0GHz, 4Gb L2 cache, 1333 MHz FSB giving 24 double precision GFLOP/s peak, ie. Another approach is to use memcpy. 40GHz (SSE4)----- aligned strings --498064 cycles - 10 ( 0) 0: crt_memcpy. See manual 3 and 4 for details about individual microprocessor models. 11 has been released on Sun, 30 Apr 2017. Do not expect significant difference in using either of these functions when combined with step #1. Compilation without optimization First of all, the performance tuning needs to be based on a qualified application. The purpose of using the POSIX thread library in your software is to execute software faster. I expect this code to run faster than the SSE-based one for small vector sizes, which is our case with IP. インテルコンパイラでコンパイルすると、たまに_intel_fast_memcpyって関数が呼ばれている。これが何やってるかわからないが、もし速くメモリコピーできる手段があるならそれを使えばfillも速くなるんじゃないかと思ってやってみた。. You either do an alignment check of the pointer, and then memcpy if unaligned, or just always use memcpy. CREATE_QUEUE_TABLE (Doc ID 1900044. (Its official name is “4th generation Intel® Core™ processor family”). Torvalds fired his criticism of the Intel Advanced Vector Extensions 512 (Intel AVX-512) in a mailing list chat. >> >> Functions like memset/memmove/memcpy do a lot of memory accesses. Has Intel lost its mojo? Vulkan Synchronization Validation - Quick Start Guide; DOOM Eternal: Official GeForce RTX 3080 4K Gameplay, World Premiere ⦿ GeeXLab Blog. Intel® QuickData Technology enables data copy by the chipset instead of the CPU, to move data more efficiently through the server and provide fast, scalable, and reliable throughput. Server has Xeon 2640v4 2. * * Changes: * 05/Jan/00 V1. rpm 是不是就是这二个包啊,这是我从他们官方站下载的. Fast Memory benchmark - test your RAM speed You dont always need an extended memory test on Windows 10, 8. Frank ‡ Ramesh Peri‡, Todd Austin † †University of Michigan ‡Intel Corporation. std::_Hashtable 256K. 4 (151 samples, 0. Not programmaticway. The rest of this chapter is completely Intel specific. use gdb to view memcpy() in disassembled code, it works like this: (gdb) set disassembly-flavor intel (gdb) x/20i 0xffffffff812ca220 0xffffffff812ca220: mov rax,rdi 0xffffffff812ca223: mov rcx,rdx 0xffffffff812ca226: rep movs BYTE PTR es:[rdi],BYTE PTR. 93789GB/s 64MB 0. The features of Intel I/OAT enhance data acceleration across the computing platform. This is presumably because the faster CPU (and chipset) reduces the host-side memory copy cost. Unfortunately emulating a CPU can't be multithreaded really. The Documents page contains more information. For that, the CPU: (1) extracts the offset of BD entry from bits 20–47 of the pointer address and shifts it by 3 bits (since all BD entries are 2 3 bits long), (2) loads the base address of BD from the BNDCFGx (in particular, BNDCFGU in user space and BNDCFGS in kernel mode) register, and (3) sums the base and the offset and. 4 64Bit 2节点RAC在巡检alert日志中发现如下错误,2个节点都出现相同的问题,目前. On Linux x86_64 gcc memcpy is usually twice as fast when you're not bound by cache misses, while both are roughly the same on FreeBSD x86_64 gcc. h file not found. AVX2 shipped with Intel’s latest processor micro-architecture, codenamed “Haswell“. To improve performance, more recent processors support modifications to the processor’s operation during the string store operations initiated with MOVS and MOVSB. These exponential functions are compactly calculated at each time step as first-order differential equations, requiring one multiply each, if the decay and attack rates are specified as the fractional change in amplitude per decay sample. 2 GHz, 6 Sandy Bridge cores, 12MB L3 Cache) and an NVIDIA GeForce GTX 680 GPU (8 Kepler SMs, Compute Capability 3. The basic outline is that you create a PBO of the right size, map the PBO into memory, copy pixel data into the PBO with memcpy, unmap the PBO, and then upload from the PBO to a texture with glTexSubImage2D. The memcpy() call on line 7 is also protected by an explicit range check on line 6 that tests both the upper and lower bounds. 2 version of memcpy, but I cannot seem to beat _intel_fast_memcpy on Xeon V3. In current DPDK, memcpy holds a large proportion of execution time in libs like Vhost, especially for large packets, and this patch can bring considerable benefits for AVX512 platforms. Memcpy is most of the time compiled into code that's as fast as the computer can do it. Thu Mar 29 2018 Krzysztof Czurylo This is the first release of PMDK under a new name. Hitting ORA-07445 Ntel_new_memcpy While Creating Queue Table SYS. Just use "classic" rep movsb instruction. Intel Xeon® 5500 Series Processor (Nehalem-EP) Intel® Turbo Boost Technology Intel® Hyper-Threading Technology Increases performance by increasing processor frequency and enabling faster speeds when conditions allow Frequency Core 0 Core 1 Core 2 Core 3 All cores operate at rated frequency All cores operate at higher frequency Core 0 Higher.