Article: Nehalem Performance Preview
By: iz (i.delete@this.z.x), April 12, 2009 2:59 am
Room: Moderated Discussions
Paul (no@thanks.com) on 4/12/09 wrote:
---------------------------
>I think that omit-frame-pointer pointer has been part of -O for GCC for a while,
>a lot of work was put in to make debugging possible on x86 without the frame pointer.
Only for x86_64, but 32 bits x86 with gcc 4.3.2:
$ diff -u O2.s O2-omit-frame-pointer.s
--- O2.s 2009-04-12 12:48:27.000000000 +0200
+++ O2-omit-frame-pointer.s 2009-04-12 12:48:37.000000000 +0200
@@ -7,9 +7,7 @@
.globl bla
.type bla, @function
bla:
- pushl %ebp
- movl %esp, %ebp
- subl $8, %esp
+ subl $12, %esp
movl $.LC0, (%esp)
call puts
movl $1, (%esp)
---------------------------
>I think that omit-frame-pointer pointer has been part of -O for GCC for a while,
>a lot of work was put in to make debugging possible on x86 without the frame pointer.
Only for x86_64, but 32 bits x86 with gcc 4.3.2:
$ diff -u O2.s O2-omit-frame-pointer.s
--- O2.s 2009-04-12 12:48:27.000000000 +0200
+++ O2-omit-frame-pointer.s 2009-04-12 12:48:37.000000000 +0200
@@ -7,9 +7,7 @@
.globl bla
.type bla, @function
bla:
- pushl %ebp
- movl %esp, %ebp
- subl $8, %esp
+ subl $12, %esp
movl $.LC0, (%esp)
call puts
movl $1, (%esp)
| Topic | Posted By | Date |
|---|---|---|
| Nehalem review up | David Kanter | 2009/04/07 03:43 AM |
| Nehalem review up | noone | 2009/04/07 06:48 AM |
| Strange jbb on Harpertown | Henrik S | 2009/04/07 08:29 AM |
| Strange jbb on Harpertown | David Kanter | 2009/04/07 11:19 AM |
| Strange jbb on Harpertown | Henrik S | 2009/04/07 09:33 PM |
| Strange jbb on Harpertown | Chris | 2009/04/08 12:54 AM |
| Strange jbb on Harpertown | Henrik S | 2009/04/08 02:40 AM |
| Nehalem review up | Vincent Diepeveen | 2009/04/07 08:34 AM |
| Nehalem review up | Jack | 2009/04/09 04:51 PM |
| Nehalem review up | Vincent Diepeveen | 2009/04/10 01:58 AM |
| Nehalem review up | Michael S | 2009/04/10 03:45 AM |
| Nehalem review up | EduardoS | 2009/04/10 07:01 AM |
| Nehalem review up | Michael S | 2009/04/10 07:56 AM |
| Nehalem review up | Eugene Nalimov | 2009/04/10 09:12 AM |
| Choice of C compiler doesn't matter much for Java... | Henrik S | 2009/04/10 10:10 AM |
| Choice of C compiler doesn't matter much for Java... | EduardoS | 2009/04/10 02:49 PM |
| Choice of C compiler doesn't matter much for Java... | Henrik S | 2009/04/11 07:13 AM |
| Choice of C compiler doesn't matter much for Java... | EduardoS | 2009/04/11 11:30 AM |
| Large pages | David Kanter | 2009/04/11 02:02 PM |
| Choice of C compiler doesn't matter much for Java... | Henrik S | 2009/04/11 11:06 PM |
| Choice of C compiler doesn't matter much for Java... | Paul | 2009/04/12 01:53 AM |
| Choice of C compiler doesn't matter much for Java... | iz | 2009/04/12 02:59 AM |
| Choice of C compiler doesn't matter much for Java... | Henrik S | 2009/04/12 07:37 AM |
| Choice of C compiler doesn't matter much for Java... | EduardoS | 2009/04/12 08:08 AM |
| Choice of C compiler doesn't matter much for Java... | Henrik S | 2009/04/12 09:25 AM |
| Choice of C compiler doesn't matter much for Java... | EduardoS | 2009/04/12 05:24 PM |
| Choice of C compiler doesn't matter much for Java... | Henrik S | 2009/04/12 10:18 PM |
| Thread costs | David Kanter | 2009/04/13 12:12 AM |
| Thread costs | Henrik S | 2009/04/14 02:08 PM |
| Choice of C compiler doesn't matter much for Java... | Michael S | 2009/04/11 08:53 AM |
| Choice of C compiler doesn't matter much for Java... | Henrik S | 2009/04/11 11:08 PM |
| Nehalem review up | Vincent Diepeveen | 2009/04/11 04:50 PM |
| Nehalem review up | Michael S | 2009/04/11 05:12 PM |
| Nehalem review up | Vincent Diepeveen | 2009/04/12 03:01 AM |
| Nehalem review up | Michael S | 2009/04/12 05:07 AM |
| Nehalem review up | rwessel | 2009/04/07 02:01 PM |
| Nehalem review up | slacker | 2009/04/08 09:11 AM |
| Energy vs. power | David Kanter | 2009/04/08 10:11 AM |
| Energy vs. power | Vincent Diepeveen | 2009/04/10 02:08 AM |
| Energy vs. power | slacker | 2009/04/10 09:26 AM |
| Energy vs. power | RagingDragon | 2009/04/10 10:19 AM |
| Energy vs. power | David Kanter | 2009/04/10 11:47 AM |
| Energy vs. power | Jack | 2009/04/10 04:44 PM |
| Energy vs. power | slacker | 2009/04/10 07:00 PM |
| Energy vs. power | Jack | 2009/04/10 07:31 PM |
| Energy vs. power | David Kanter | 2009/04/11 12:16 AM |
| Nehalem review up | rwessel | 2009/04/08 02:32 PM |
| Minor font issue | gpriatko | 2009/04/07 04:35 PM |
| Minor HTML issue | David Kanter | 2009/04/07 09:38 PM |
| Minor HTML issue | David Kanter | 2009/04/07 09:39 PM |
| Good work, i look forward to linux and SP2 numbers (NT) | PiedPiper | 2009/04/08 01:52 AM |
| Nehalem review up | Joe Chang | 2009/04/10 03:59 AM |