* Bruce Merry <bme...@ska.ac.za> wrote: > This was causing the destination instead of the source to be filled. > As a result, the source was typically all mapped to one zero page, > and hence very cacheable. > > Signed-off-by: Bruce Merry <bme...@ska.ac.za> > --- > tools/perf/bench/mem-memcpy.c | 4 ++-- > 1 file changed, 2 insertions(+), 2 deletions(-) > > diff --git a/tools/perf/bench/mem-memcpy.c b/tools/perf/bench/mem-memcpy.c > index 6c14afe..db1d3a2 100644 > --- a/tools/perf/bench/mem-memcpy.c > +++ b/tools/perf/bench/mem-memcpy.c > @@ -289,7 +289,7 @@ static u64 do_memcpy_cycle(const struct routine *r, > size_t len, bool prefault) > memcpy_t fn = r->fn.memcpy; > int i; > > - memcpy_alloc_mem(&src, &dst, len); > + memcpy_alloc_mem(&dst, &src, len); > > if (prefault) > fn(dst, src, len); > @@ -312,7 +312,7 @@ static double do_memcpy_gettimeofday(const struct routine > *r, size_t len, > void *src = NULL, *dst = NULL; > int i; > > - memcpy_alloc_mem(&src, &dst, len); > + memcpy_alloc_mem(&dst, &src, len); > > if (prefault) > fn(dst, src, len);
Acked-by: Ingo Molnar <mi...@kernel.org> Thanks, Ingo -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/