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  1. usage of "_mm_prefetch(...)"

    https://software.intel.com/en-us/forums/intel-c-compiler/topic/311348

    Jan 7, 2003 ... I believe I have to use the "_mm_prefetch(...)" instruction with the "_MM_HINTT0" argument since the result of the operation will be used again ...

  2. The _mm_prefetch() intrinsic causes profiles to be ignored | Intel ...

    https://software.intel.com/en-us/articles/the-_mm_prefetch-intrinsic-causes-profiles-to-be-ignored

    Nov 29, 2009 ... The _mm_prefetch() Intrinsic causes profiles to be ignored when you add it to profiled code with existing profiles.

  3. omp_set_num_threads(240); #pragma omp parallel for schedule

    https://software.intel.com/sites/default/files/code1_0.cpp

    ... B10_, B11_, B12_, B13_, B14_, B16_, B17_; //L1 B prefetch _mm_prefetch( ( const char *)&B[ 16*18 * itr + 0*16 ], _MM_HINT_T0 ); _mm_prefetch( (const char  ...

  4. omp_set_num_threads(240); #pragma omp parallel for schedule ...

    https://software.intel.com/sites/default/files/bwcode.cpp

    ... B10_, B11_, B12_, B13_, B14_, B16_, B17_; //L1 B prefetch _mm_prefetch( ( const char *)&B[ 16*18 * itr + 0*16 ], _MM_HINT_T0 ); _mm_prefetch( (const char  ...

  5. Cache and _mm_prefetch

    https://software.intel.com/en-us/forums/intel-isa-extensions/topic/557689

    May 10, 2015 ... Or should I give hints, with _mm_prefetch? If so, how do I use this intrinsic. Should I always give L1 as cache level. And how many iterations ...

  6. Typing errors in xmm_func.h header file for _mm_prefetch intrinsic ...

    https://software.intel.com/en-us/forums/intel-isa-extensions/topic/404701

    Jul 30, 2013 ... There are two typing errors in xmm_func.h header file for _mm_prefetch intrinsic function. Details will be provided.

  7. The following code comes with the 3-clause BSD license

    https://software.intel.com/sites/default/files/76/99/popcnt-mmic.cpp

    ... += _mm_countbits_32(buf[i]); _mm_prefetch((const char *)&buf[i+512], _MM_HINT_T1); // vprefetch1 _mm_prefetch((const char *)&buf[i+64], _MM_HINT_T0); ...

  8. Compiler Prefetching for KNC

    https://software.intel.com/en-us/search/gss/_mm_prefetch?page=2

    void _mm_prefetch(char const*a, int sel);. Loads one cache line of data from address a to a location "closer" to the processor. The value sel specifies the type of .

  9. _mm_prefetch Intrinsic

    https://software.intel.com/en-us/forums/intel-c-compiler/topic/277399

    Jul 12, 2012 ... Hello, I am using a function (compute_sad_16x16) that accesses two buffers, line by line, and finds the sum of absolute differences between ...

  10. Does _mm_prefetch really work?

    https://software.intel.com/en-us/forums/intel-c-compiler/topic/310646

    Jan 7, 2004 ... By the way, I've saw Intel's copy array example, but it use _mm_string_ps and _mm_load_ps, I need example which only use _mm_prefetch ...

  11. Memory Management for Optimal Performance on Intel® Xeon Phi ...

    https://software.intel.com/en-us/articles/memory-management-for-optimal-performance-on-intel-xeon-phi-coprocessor-alignment-and

    Feb 3, 2014 ... Note that the “noprefetch” pragma does not affect any prefetches you explicitly include, such as _mm_prefetch . #include <stdio.h> #include ...

  12. Compiler error with some MIC intrinsics

    https://software.intel.com/en-us/forums/intel-many-integrated-core/topic/538762

    Jan 15, 2015 ... If I comment out the _mm_prefetch I'm getting an "internal error: 04010002_1809" . However if I compile this as a native application using "icc ...

  13. L1/L2 cache (read) bandwidth

    https://software.intel.com/en-us/forums/intel-many-integrated-core/topic/391263

    Apr 29, 2013 ... 07, _mm_prefetch(( char *)(y+i+8)+prefetch_distance_L1,1); ... 14, _mm_prefetch (( char *)(x+i+16)+prefetch_distance_L1,1); ...

  14. prefetch instruction problem

    https://software.intel.com/en-us/forums/intel-c-compiler/topic/309375

    Dec 29, 2004 ... When Iuse "_mm_prefetch" instruction 128 consecutive times, it is actually translated as "NOP" (no data transfer from the RAM to the Caches is ...

  15. #ifndef VEXPR_VECTORIZER #define VEXPR_VECTORIZER ...

    https://software.intel.com/sites/default/files/m/a/b/d/6/3/37376-VExpr_vectorizer.h

    ... &c) { return _mm_add_pd(_mm_mul_pd(a, b), c); } inline static void prefetch( double *a) { _mm_prefetch((const char*)a, _MM_HINT_T0); } }; template<> struct  ...

  16. Fast implemention of popcount on Xeon Phi

    https://software.intel.com/en-us/forums/intel-many-integrated-core/topic/390931

    Apr 23, 2013 ... 015, _mm_prefetch(( const char *)&buf[i+256], _MM_HINT_T1); // vprefetch1. 016 , _mm_prefetch(( const char *)&buf[i+64], _MM_HINT_T0); ...

  17. SSE2 on EM64T and Win64

    https://software.intel.com/en-us/forums/intel-vtune-amplifier-xe/topic/307062

    May 11, 2006 ... _mm_prefetch((char*) (src_ptr + 4), _MM_HINT_T0); ... is corrected at 256 bytes if I place a flush before the second _mm_prefetch().

  18. PrefetchT0

    https://software.intel.com/en-us/forums/software-tuning-performance-optimization-platform-monitoring/topic/500798

    Jan 29, 2014 ... In my codes all of them are wrapped with simple macros and they based on _mm_prefetch intrinsic function. Top. Log in to post comments.

  19. Copyright 2009-2011 Intel Corporation // // // // Licensed under the ...

    https://software.intel.com/sites/default/files/m/d/1/2/0/d/43340-sse.h

    ... END_ITERATE_SSEI } } namespace embree { /* prefetches */ __forceinline void prefetchL1 (const void* ptr) { _mm_prefetch((const char*)ptr,_MM_HINT_T0); } ...

  20. Passing some memory boundary values to 'prefetcht*' instructions

    https://software.intel.com/en-us/forums/software-tuning-performance-optimization-platform-monitoring/topic/280417

    Dec 23, 2011 ... ... passed to 'prefetcht*' instructions on a 32-bit platform? Here is an example: ... _mm_prefetch( 0xFFFFFFFF, _MM_HINT_T0); ... Best regards,

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