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First touch only on CPU code

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This commit is contained in:
Peter Boyle 2019-06-15 07:45:43 +01:00
parent d0d8dc8042
commit 339ea10cc7
1 changed files with 7 additions and 6 deletions
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11
Grid/allocator/AlignedAllocator.h
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@ -177,6 +177,7 @@ public:
assert(0);
}
}
assert( ptr != (_Tp *)NULL);
#else
//////////////////////////////////////////////////////////////////////////////////////////
// 2MB align; could make option probably doesn't need configurability
@ -186,16 +187,16 @@ public:
#else
if ( ptr == (_Tp *) NULL ) ptr = (_Tp *) memalign(GRID_ALLOC_ALIGN,bytes);
#endif
#endif
assert( ptr != (_Tp *)NULL);
/////////////////////////////////////////
//////////////////////////////////////////////////
// First touch optimise in threaded loop
/////////////////////////////////////////
uint8_t *cp = (uint8_t *)ptr;
thread_loop( (size_type n=0;n<bytes;n+=4096) , {
//////////////////////////////////////////////////
uint64_t *cp = (uint64_t *)ptr;
thread_for(n,bytes/sizeof(uint64_t), { // need only one touch per page
cp[n]=0;
});
#endif
return ptr;
}