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Feature #10081

closed

[PATCH] Specifying MACRO for increase performence in ppc64

Added by gustavo.pedrosa (Gustavo Frederico Temple Pedrosa) over 10 years ago. Updated over 10 years ago.

Status:
Closed
Assignee:
-
Target version:
[ruby-core:63937]

Description

To increase performance on ppc64 machines, the MACRO "powerpc64" were specified for the architecture, just like for x86_64 machines.

I've executed some benchmarks, see below:

Benchmark               Before (milliseconds)	After (milliseconds)	Percentage difference
bm_vm2_regexp.rb        4955                    4752                    -4,10%
bm_so_meteor_contest.rb 6065                    5817                    -4,09%
bm_app_pentomino.rb     35122                   34886                   -0,67%
bm_hash_flatten.rb      3055                    3011                    -1,44%
bm_so_sieve.rb          1227                    1210                    -1,39%

Files

macro_powerpc64.patch (1.16 KB) macro_powerpc64.patch gustavo.pedrosa (Gustavo Frederico Temple Pedrosa), 07/22/2014 06:40 PM

Updated by nobu (Nobuyoshi Nakada) over 10 years ago

PowerPC64 can unaligned access?

Updated by gustavo.pedrosa (Gustavo Frederico Temple Pedrosa) over 10 years ago

Nobuyoshi Nakada wrote:

PowerPC64 can unaligned access?

Yes, I have tested in my IBM POWER 7+ (rev 2.1)

Updated by nobu (Nobuyoshi Nakada) over 10 years ago

Thank you.
Possibly, can PACKED_STRUCT_UNALIGNED also work on PowerPC64?

Updated by nobu (Nobuyoshi Nakada) over 10 years ago

  • Status changed from Open to Closed
  • % Done changed from 0 to 100

Applied in changeset r46915.


UNALIGNED_WORD_ACCESS on ppc64

  • include/ruby/defines.h, siphash.c, st.c (UNALIGNED_WORD_ACCESS):
    add PowerPC64 too, which is capable to access unaligned words.
    patched by Gustavo Frederico Temple Pedrosa in [ruby-core:63937].
    [Feature #10081]
  • regint.h (PLATFORM_UNALIGNED_WORD_ACCESS): ditto.
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