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* [Bug tree-optimization/54271] New: [4.7/4.8 Regression] libgcrypt CRC24RFC2440 30% slower
@ 2012-08-15 14:24 wbrana at gmail dot com
  2012-08-15 14:29 ` [Bug tree-optimization/54271] " jakub at gcc dot gnu.org
  2012-08-16 10:41 ` rguenth at gcc dot gnu.org
  0 siblings, 2 replies; 3+ messages in thread
From: wbrana at gmail dot com @ 2012-08-15 14:24 UTC (permalink / raw)
  To: gcc-bugs

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54271

             Bug #: 54271
           Summary: [4.7/4.8 Regression] libgcrypt CRC24RFC2440 30% slower
    Classification: Unclassified
           Product: gcc
           Version: 4.8.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: wbrana@gmail.com


ftp://ftp.gnupg.org/gcrypt/libgcrypt/libgcrypt-1.5.0.tar.bz2

tests/benchmark --cipher-repetitions 100 --hash-repetitions 100 md crc24rfc2440

gcc 4.6 20120804
CRC24RFC2440  1660  1690  3420  1900  1670 10340ms

gcc 4.7 20120812
CRC24RFC2440  2520  2550  4230  2760  2520 14580ms

gcc 4.8 20120813
CRC24RFC2440  2550  2590  4220  2790  2550 14700ms

-O3 -pipe -march=core2 -mtune=core2 -fomit-frame-pointer -funroll-loops --param
max-unrolled-insns=64


^ permalink raw reply	[flat|nested] 3+ messages in thread
* [Bug tree-optimization/54271] [4.7/4.8 Regression] libgcrypt CRC24RFC2440 30% slower
  2012-08-15 14:24 [Bug tree-optimization/54271] New: [4.7/4.8 Regression] libgcrypt CRC24RFC2440 30% slower wbrana at gmail dot com
@ 2012-08-15 14:29 ` jakub at gcc dot gnu.org
  2012-08-16 10:41 ` rguenth at gcc dot gnu.org
  1 sibling, 0 replies; 3+ messages in thread
From: jakub at gcc dot gnu.org @ 2012-08-15 14:29 UTC (permalink / raw)
  To: gcc-bugs

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54271

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |jakub at gcc dot gnu.org

--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> 2012-08-15 14:29:40 UTC ---
That benchmark is quite flawed, significant time is spent in completely dumb
routine that definitely doesn't do anything close to what was intended:
_gcry_burn_stack


^ permalink raw reply	[flat|nested] 3+ messages in thread
* [Bug tree-optimization/54271] [4.7/4.8 Regression] libgcrypt CRC24RFC2440 30% slower
  2012-08-15 14:24 [Bug tree-optimization/54271] New: [4.7/4.8 Regression] libgcrypt CRC24RFC2440 30% slower wbrana at gmail dot com
  2012-08-15 14:29 ` [Bug tree-optimization/54271] " jakub at gcc dot gnu.org
@ 2012-08-16 10:41 ` rguenth at gcc dot gnu.org
  1 sibling, 0 replies; 3+ messages in thread
From: rguenth at gcc dot gnu.org @ 2012-08-16 10:41 UTC (permalink / raw)
  To: gcc-bugs

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54271

Richard Guenther <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|                            |WONTFIX
   Target Milestone|---                         |4.7.2

--- Comment #2 from Richard Guenther <rguenth at gcc dot gnu.org> 2012-08-16 10:41:11 UTC ---
I'd say wontfix then.  No need to waste time fixing bogus benchmarks.


^ permalink raw reply	[flat|nested] 3+ messages in thread
end of thread, other threads:[~2012-08-16 10:41 UTC | newest]

Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2012-08-15 14:24 [Bug tree-optimization/54271] New: [4.7/4.8 Regression] libgcrypt CRC24RFC2440 30% slower wbrana at gmail dot com
2012-08-15 14:29 ` [Bug tree-optimization/54271] " jakub at gcc dot gnu.org
2012-08-16 10:41 ` rguenth at gcc dot gnu.org

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