Re: [PATCH v2 00/15] x86, alternatives: Instruction padding and more robust JMPs

[Borislav Petkov]

Hi all,

So this alternatives patchset breaks perf bench mem, here are a couple
of patches ontop, you guys tell me whether it makes sense. I wanted to
make it run all memset/memcpy routines so here are a couple of patches
which do this:

./perf bench mem memset -l 20MB -r all
# Running 'mem/memset' benchmark:
Routine default (Default memset() provided by glibc)
# Copying 20MB Bytes ...

       1.136000 GB/Sec
       6.026304 GB/Sec (with prefault)
Routine x86-64-unrolled (unrolled memset() in arch/x86/lib/memset_64.S)
# Copying 20MB Bytes ...

       5.333493 GB/Sec
       5.633473 GB/Sec (with prefault)
Routine x86-64-stosq (movsq-based memset() in arch/x86/lib/memset_64.S)
# Copying 20MB Bytes ...

       5.828484 GB/Sec
       5.851183 GB/Sec (with prefault)
Routine x86-64-stosb (movsb-based memset() in arch/x86/lib/memset_64.S)
# Copying 20MB Bytes ...

       5.553384 GB/Sec
       5.956465 GB/Sec (with prefault)

This way you can see all results by executing one command only with "-r
all".

Patches coming as a reply to this message.

-- 
Regards/Gruss,
    Boris.

ECO tip #101: Trim your mails when you reply.
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