public inbox for gcc-bugs@sourceware.org help / color / mirror / Atom feed
From: "ebotcazou at gcc dot gnu dot org" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug c/18707] New: Performance regression at -O2 with gzip Date: Sun, 28 Nov 2004 20:30:00 -0000 [thread overview] Message-ID: <20041128203034.18707.ebotcazou@gcc.gnu.org> (raw) GCC 4.0.0pre generates worse code than GCC 3.4.4pre at -O2 for gzip 1.2.4 on UltraSPARC III. I've also included Sun ONE Studio 8 as a comparison point. 32-bit GCC vs Sun ONE Studio 8 CC: cc: "-fast -xarch=v8plusb -xchip=ultra3" gcc: "-O2 -mcpu=ultrasparc3" -rwxrwxr-x 1 eric eric 72464 Nov 28 13:08 gzip33 -rwxrwxr-x 1 eric eric 71444 Nov 28 13:09 gzip34 -rwxrwxr-x 1 eric eric 71904 Nov 28 13:10 gzip40 -rwxrwxr-x 1 eric eric 118316 Nov 28 13:42 gzipcc ./gzip33 gcc.tar 28.99s user 0.78s system 98% cpu 30.343 total ./gzip33 gcc.tar 29.03s user 0.64s system 98% cpu 29.989 total ./gzip33 gcc.tar 29.01s user 0.64s system 98% cpu 29.994 total ./gzip34 gcc.tar 24.24s user 0.70s system 98% cpu 25.383 total ./gzip34 gcc.tar 24.29s user 0.65s system 98% cpu 25.296 total ./gzip34 gcc.tar 24.30s user 0.64s system 98% cpu 25.231 total ./gzip40 gcc.tar 24.76s user 0.63s system 98% cpu 25.737 total ./gzip40 gcc.tar 24.75s user 0.63s system 98% cpu 25.668 total ./gzip40 gcc.tar 24.75s user 0.58s system 98% cpu 25.696 total ./gzipcc gcc.tar 24.53s user 0.99s system 95% cpu 26.663 total ./gzipcc gcc.tar 24.45s user 0.73s system 98% cpu 25.476 total ./gzipcc gcc.tar 24.51s user 0.65s system 98% cpu 25.513 total 64-bit GCC vs Sun ONE Studio 8 CC: cc: "-fast -xarch=v9b -xchip=ultra3" gcc: "-O2 -mcpu=ultrasparc3" -rwxrwxr-x 1 eric eric 109336 Nov 28 12:56 gzip33 -rwxrwxr-x 1 eric eric 104504 Nov 28 12:57 gzip34 -rwxrwxr-x 1 eric eric 105048 Nov 28 12:59 gzip40 -rwxrwxr-x 1 eric eric 149120 Nov 28 13:45 gzipcc ./gzip33 gcc.tar 33.54s user 0.65s system 99% cpu 34.458 total ./gzip33 gcc.tar 33.40s user 0.64s system 99% cpu 34.154 total ./gzip33 gcc.tar 33.45s user 0.54s system 99% cpu 34.101 total ./gzip34 gcc.tar 28.54s user 0.71s system 99% cpu 29.365 total ./gzip34 gcc.tar 28.64s user 0.60s system 99% cpu 29.345 total ./gzip34 gcc.tar 28.78s user 0.43s system 99% cpu 29.295 total ./gzip40 gcc.tar 30.77s user 0.48s system 99% cpu 31.369 total ./gzip40 gcc.tar 30.51s user 0.72s system 99% cpu 31.367 total ./gzip40 gcc.tar 30.65s user 0.62s system 99% cpu 31.378 total ./gzipcc gcc.tar 26.67s user 0.83s system 98% cpu 27.840 total ./gzipcc gcc.tar 26.69s user 0.67s system 99% cpu 27.438 total ./gzipcc gcc.tar 26.58s user 0.75s system 99% cpu 27.457 total -- Summary: Performance regression at -O2 with gzip Product: gcc Version: 4.0.0 Status: UNCONFIRMED Severity: normal Priority: P2 Component: c AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: ebotcazou at gcc dot gnu dot org CC: gcc-bugs at gcc dot gnu dot org GCC build triplet: sparc*-*-* GCC host triplet: sparc*-*-* GCC target triplet: sparc*-*-* http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18707
next reply other threads:[~2004-11-28 20:30 UTC|newest] Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top 2004-11-28 20:30 ebotcazou at gcc dot gnu dot org [this message] 2004-11-28 20:32 ` [Bug regression/18707] [4.0 Regression] " pinskia at gcc dot gnu dot org 2004-11-29 11:06 ` [Bug tree-optimization/18707] " ebotcazou at gcc dot gnu dot org 2004-11-29 19:25 ` pinskia at gcc dot gnu dot org 2004-12-16 20:01 ` cvs-commit at gcc dot gnu dot org 2004-12-16 20:04 ` ebotcazou at gcc dot gnu dot org
Reply instructions: You may reply publicly to this message via plain-text email using any one of the following methods: * Save the following mbox file, import it into your mail client, and reply-to-all from there: mbox Avoid top-posting and favor interleaved quoting: https://en.wikipedia.org/wiki/Posting_style#Interleaved_style * Reply using the --to, --cc, and --in-reply-to switches of git-send-email(1): git send-email \ --in-reply-to=20041128203034.18707.ebotcazou@gcc.gnu.org \ --to=gcc-bugzilla@gcc.gnu.org \ --cc=gcc-bugs@gcc.gnu.org \ /path/to/YOUR_REPLY https://kernel.org/pub/software/scm/git/docs/git-send-email.html * If your mail client supports setting the In-Reply-To header via mailto: links, try the mailto: linkBe sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions for how to clone and mirror all data and code used for this inbox; as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).