Article: Nehalem Performance Preview
By: iz (i.delete@this.z.x), April 12, 2009 1:59 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 02:43 AM |
| Nehalem review up | noone | 2009/04/07 05:48 AM |
| Strange jbb on Harpertown | Henrik S | 2009/04/07 07:29 AM |
| Strange jbb on Harpertown | David Kanter | 2009/04/07 10:19 AM |
| Strange jbb on Harpertown | Henrik S | 2009/04/07 08:33 PM |
| Strange jbb on Harpertown | Chris | 2009/04/07 11:54 PM |
| Strange jbb on Harpertown | Henrik S | 2009/04/08 01:40 AM |
| Nehalem review up | Vincent Diepeveen | 2009/04/07 07:34 AM |
| Nehalem review up | Jack | 2009/04/09 03:51 PM |
| Nehalem review up | Vincent Diepeveen | 2009/04/10 12:58 AM |
| Nehalem review up | Michael S | 2009/04/10 02:45 AM |
| Nehalem review up | EduardoS | 2009/04/10 06:01 AM |
| Nehalem review up | Michael S | 2009/04/10 06:56 AM |
| Nehalem review up | Eugene Nalimov | 2009/04/10 08:12 AM |
| Choice of C compiler doesn't matter much for Java... | Henrik S | 2009/04/10 09:10 AM |
| Choice of C compiler doesn't matter much for Java... | EduardoS | 2009/04/10 01:49 PM |
| Choice of C compiler doesn't matter much for Java... | Henrik S | 2009/04/11 06:13 AM |
| Choice of C compiler doesn't matter much for Java... | EduardoS | 2009/04/11 10:30 AM |
| Large pages | David Kanter | 2009/04/11 01:02 PM |
| Choice of C compiler doesn't matter much for Java... | Henrik S | 2009/04/11 10:06 PM |
| Choice of C compiler doesn't matter much for Java... | Paul | 2009/04/12 12:53 AM |
| Choice of C compiler doesn't matter much for Java... | iz | 2009/04/12 01:59 AM |
| Choice of C compiler doesn't matter much for Java... | Henrik S | 2009/04/12 06:37 AM |
| Choice of C compiler doesn't matter much for Java... | EduardoS | 2009/04/12 07:08 AM |
| Choice of C compiler doesn't matter much for Java... | Henrik S | 2009/04/12 08:25 AM |
| Choice of C compiler doesn't matter much for Java... | EduardoS | 2009/04/12 04:24 PM |
| Choice of C compiler doesn't matter much for Java... | Henrik S | 2009/04/12 09:18 PM |
| Thread costs | David Kanter | 2009/04/12 11:12 PM |
| Thread costs | Henrik S | 2009/04/14 01:08 PM |
| Choice of C compiler doesn't matter much for Java... | Michael S | 2009/04/11 07:53 AM |
| Choice of C compiler doesn't matter much for Java... | Henrik S | 2009/04/11 10:08 PM |
| Nehalem review up | Vincent Diepeveen | 2009/04/11 03:50 PM |
| Nehalem review up | Michael S | 2009/04/11 04:12 PM |
| Nehalem review up | Vincent Diepeveen | 2009/04/12 02:01 AM |
| Nehalem review up | Michael S | 2009/04/12 04:07 AM |
| Nehalem review up | rwessel | 2009/04/07 01:01 PM |
| Nehalem review up | slacker | 2009/04/08 08:11 AM |
| Energy vs. power | David Kanter | 2009/04/08 09:11 AM |
| Energy vs. power | Vincent Diepeveen | 2009/04/10 01:08 AM |
| Energy vs. power | slacker | 2009/04/10 08:26 AM |
| Energy vs. power | RagingDragon | 2009/04/10 09:19 AM |
| Energy vs. power | David Kanter | 2009/04/10 10:47 AM |
| Energy vs. power | Jack | 2009/04/10 03:44 PM |
| Energy vs. power | slacker | 2009/04/10 06:00 PM |
| Energy vs. power | Jack | 2009/04/10 06:31 PM |
| Energy vs. power | David Kanter | 2009/04/10 11:16 PM |
| Nehalem review up | rwessel | 2009/04/08 01:32 PM |
| Minor font issue | gpriatko | 2009/04/07 03:35 PM |
| Minor HTML issue | David Kanter | 2009/04/07 08:38 PM |
| Minor HTML issue | David Kanter | 2009/04/07 08:39 PM |
| Good work, i look forward to linux and SP2 numbers (NT) | PiedPiper | 2009/04/08 12:52 AM |
| Nehalem review up | Joe Chang | 2009/04/10 02:59 AM |
