Re: [patch] speed up / fix the new generic semaphore code (fix AIM7 40% regression with 2.6.26-rc1) | KernelTrap

Re: [patch] speed up / fix the new generic semaphore code (fix AIM7 40% regression with 2.6.26-rc1)

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From: Andi Kleen

Subject: Re: [patch] speed up / fix the new generic semaphore code (fix AIM7 40% regression with 2.6.26-rc1)

Date: Friday, May 9, 2008 - 1:29 am

Linus Torvalds <torvalds@linux-foundation.org> writes:
quoted text>
> Well, it turns out that Ingo's fixed statistics actually put the real cost 
> in fcntl/ioctl/open/release:
>
>     310  down <= lock_kernel <= sys_fcntl <= system_call_after_swapgs <

That must be ->fasync? If it was file locks the lock_kernel would not
be inlined into sys_fcntl. Or is that an truncated back trace?

-Andi (wondering if he should plug ->fasync_unlocked again ...)
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Messages in current thread:

AIM7 40% regression with 2.6.26-rc1, Zhang, Yanmin, (Mon May 5, 10:48 pm)

Re: AIM7 40% regression with 2.6.26-rc1, Matthew Wilcox, (Tue May 6, 4:18 am)

Re: AIM7 40% regression with 2.6.26-rc1, Ingo Molnar, (Tue May 6, 4:44 am)

Re: AIM7 40% regression with 2.6.26-rc1, Matthew Wilcox, (Tue May 6, 5:09 am)

Re: AIM7 40% regression with 2.6.26-rc1, Matthew Wilcox, (Tue May 6, 9:23 am)

Re: AIM7 40% regression with 2.6.26-rc1, Linus Torvalds, (Tue May 6, 9:36 am)

Re: AIM7 40% regression with 2.6.26-rc1, Alan Cox, (Tue May 6, 9:39 am)

Re: AIM7 40% regression with 2.6.26-rc1, Matthew Wilcox, (Tue May 6, 9:42 am)

Re: AIM7 40% regression with 2.6.26-rc1, J. Bruce Fields, (Tue May 6, 9:44 am)

Re: AIM7 40% regression with 2.6.26-rc1, Alan Cox, (Tue May 6, 9:45 am)

Re: AIM7 40% regression with 2.6.26-rc1, Matthew Wilcox, (Tue May 6, 9:51 am)

Re: AIM7 40% regression with 2.6.26-rc1, Andrew Morton, (Tue May 6, 10:21 am)

Re: AIM7 40% regression with 2.6.26-rc1, Matthew Wilcox, (Tue May 6, 10:31 am)

Re: AIM7 40% regression with 2.6.26-rc1, Ingo Molnar, (Tue May 6, 10:39 am)

Re: AIM7 40% regression with 2.6.26-rc1, Linus Torvalds, (Tue May 6, 10:42 am)

Re: AIM7 40% regression with 2.6.26-rc1, Linus Torvalds, (Tue May 6, 10:45 am)

Re: AIM7 40% regression with 2.6.26-rc1, Ingo Molnar, (Tue May 6, 10:49 am)

Re: AIM7 40% regression with 2.6.26-rc1, Andrew Morton, (Tue May 6, 11:07 am)

Re: AIM7 40% regression with 2.6.26-rc1, Linus Torvalds, (Tue May 6, 1:28 pm)

Re: AIM7 40% regression with 2.6.26-rc1, Zhang, Yanmin, (Tue May 6, 7:11 pm)

Re: AIM7 40% regression with 2.6.26-rc1, Zhang, Yanmin, (Tue May 6, 8:41 pm)

Re: AIM7 40% regression with 2.6.26-rc1, Andrew Morton, (Tue May 6, 8:59 pm)

Re: AIM7 40% regression with 2.6.26-rc1, Zhang, Yanmin, (Tue May 6, 9:46 pm)

Re: AIM7 40% regression with 2.6.26-rc1, Ingo Molnar, (Tue May 6, 11:26 pm)

Re: AIM7 40% regression with 2.6.26-rc1, Ingo Molnar, (Tue May 6, 11:28 pm)

Re: AIM7 40% regression with 2.6.26-rc1, Zhang, Yanmin, (Tue May 6, 11:49 pm)

Re: AIM7 40% regression with 2.6.26-rc1, Zhang, Yanmin, (Wed May 7, 12:05 am)

Re: AIM7 40% regression with 2.6.26-rc1, Andi Kleen, (Wed May 7, 4:00 am)

Re: AIM7 40% regression with 2.6.26-rc1, Matthew Wilcox, (Wed May 7, 4:46 am)

Re: AIM7 40% regression with 2.6.26-rc1, Andi Kleen, (Wed May 7, 5:21 am)

Re: AIM7 40% regression with 2.6.26-rc1, Alan Cox, (Wed May 7, 6:59 am)

Re: AIM7 40% regression with 2.6.26-rc1, Alan Cox, (Wed May 7, 7:35 am)

Re: AIM7 40% regression with 2.6.26-rc1, Linus Torvalds, (Wed May 7, 7:36 am)

Re: AIM7 40% regression with 2.6.26-rc1, Andi Kleen, (Wed May 7, 7:57 am)

Re: AIM7 40% regression with 2.6.26-rc1, Linus Torvalds, (Wed May 7, 8:00 am)

Re: AIM7 40% regression with 2.6.26-rc1, Linus Torvalds, (Wed May 7, 8:02 am)

Re: AIM7 40% regression with 2.6.26-rc1, Linus Torvalds, (Wed May 7, 8:19 am)

Re: AIM7 40% regression with 2.6.26-rc1, Andrew Morton, (Wed May 7, 8:31 am)

Re: AIM7 40% regression with 2.6.26-rc1, Ingo Molnar, (Wed May 7, 9:20 am)

Re: AIM7 40% regression with 2.6.26-rc1, Matthew Wilcox, (Wed May 7, 9:22 am)

Re: AIM7 40% regression with 2.6.26-rc1, Linus Torvalds, (Wed May 7, 9:35 am)

Re: AIM7 40% regression with 2.6.26-rc1, Matthew Wilcox, (Wed May 7, 9:38 am)

Re: AIM7 40% regression with 2.6.26-rc1, Linus Torvalds, (Wed May 7, 9:55 am)

Re: AIM7 40% regression with 2.6.26-rc1, Ingo Molnar, (Wed May 7, 10:05 am)

Re: AIM7 40% regression with 2.6.26-rc1, Linus Torvalds, (Wed May 7, 10:08 am)

Re: AIM7 40% regression with 2.6.26-rc1, Ingo Molnar, (Wed May 7, 10:14 am)

Re: AIM7 40% regression with 2.6.26-rc1, Andrew Morton, (Wed May 7, 10:16 am)

Re: AIM7 40% regression with 2.6.26-rc1, Ingo Molnar, (Wed May 7, 10:22 am)

Re: AIM7 40% regression with 2.6.26-rc1, Linus Torvalds, (Wed May 7, 10:24 am)

Re: AIM7 40% regression with 2.6.26-rc1, Ingo Molnar, (Wed May 7, 10:25 am)

Re: AIM7 40% regression with 2.6.26-rc1, Linus Torvalds, (Wed May 7, 10:27 am)

Re: AIM7 40% regression with 2.6.26-rc1, Linus Torvalds, (Wed May 7, 10:31 am)

Re: AIM7 40% regression with 2.6.26-rc1, Ingo Molnar, (Wed May 7, 10:36 am)

Re: AIM7 40% regression with 2.6.26-rc1, Linus Torvalds, (Wed May 7, 10:47 am)

Re: AIM7 40% regression with 2.6.26-rc1, Ingo Molnar, (Wed May 7, 10:49 am)

Re: AIM7 40% regression with 2.6.26-rc1, Linus Torvalds, (Wed May 7, 10:55 am)

Re: AIM7 40% regression with 2.6.26-rc1, Matthew Wilcox, (Wed May 7, 10:59 am)

Re: AIM7 40% regression with 2.6.26-rc1, Linus Torvalds, (Wed May 7, 11:02 am)

Re: AIM7 40% regression with 2.6.26-rc1, Ingo Molnar, (Wed May 7, 11:17 am)

Re: AIM7 40% regression with 2.6.26-rc1, Linus Torvalds, (Wed May 7, 11:17 am)

Re: AIM7 40% regression with 2.6.26-rc1, Linus Torvalds, (Wed May 7, 11:27 am)

Re: AIM7 40% regression with 2.6.26-rc1, Ingo Molnar, (Wed May 7, 11:43 am)

Re: AIM7 40% regression with 2.6.26-rc1, Ingo Molnar, (Wed May 7, 11:49 am)

Re: AIM7 40% regression with 2.6.26-rc1, Linus Torvalds, (Wed May 7, 12:01 pm)

Re: AIM7 40% regression with 2.6.26-rc1, Ingo Molnar, (Wed May 7, 12:09 pm)

Re: AIM7 40% regression with 2.6.26-rc1, Matthew Wilcox, (Wed May 7, 12:24 pm)

Re: AIM7 40% regression with 2.6.26-rc1, Linus Torvalds, (Wed May 7, 12:44 pm)

Oi. NFS people. Read this., Matthew Wilcox, (Wed May 7, 1:00 pm)

Re: Oi. NFS people. Read this., Trond Myklebust, (Wed May 7, 3:10 pm)

Re: AIM7 40% regression with 2.6.26-rc1, Zhang, Yanmin, (Wed May 7, 7:44 pm)

Re: AIM7 40% regression with 2.6.26-rc1, Zhang, Yanmin, (Wed May 7, 8:24 pm)

Re: AIM7 40% regression with 2.6.26-rc1, Linus Torvalds, (Wed May 7, 8:29 pm)

Re: AIM7 40% regression with 2.6.26-rc1, Linus Torvalds, (Wed May 7, 8:34 pm)

Re: AIM7 40% regression with 2.6.26-rc1, Zhang, Yanmin, (Wed May 7, 9:08 pm)

Re: AIM7 40% regression with 2.6.26-rc1, Linus Torvalds, (Wed May 7, 9:17 pm)

Re: AIM7 40% regression with 2.6.26-rc1, Zhang, Yanmin, (Wed May 7, 9:37 pm)

Re: AIM7 40% regression with 2.6.26-rc1, Ingo Molnar, (Wed May 7, 11:43 pm)

Re: AIM7 40% regression with 2.6.26-rc1, Andrew Morton, (Wed May 7, 11:48 pm)

Re: AIM7 40% regression with 2.6.26-rc1, Zhang, Yanmin, (Thu May 8, 12:14 am)

Re: AIM7 40% regression with 2.6.26-rc1, Ingo Molnar, (Thu May 8, 12:39 am)

Re: AIM7 40% regression with 2.6.26-rc1, Zhang, Yanmin, (Thu May 8, 1:44 am)

Re: AIM7 40% regression with 2.6.26-rc1, Ingo Molnar, (Thu May 8, 2:21 am)

Re: AIM7 40% regression with 2.6.26-rc1, Ingo Molnar, (Thu May 8, 2:29 am)

Re: AIM7 40% regression with 2.6.26-rc1, Zhang, Yanmin, (Thu May 8, 2:30 am)

[patch] speed up / fix the new generic semaphore code (fix ..., Ingo Molnar, (Thu May 8, 5:01 am)

Re: [patch] speed up / fix the new generic semaphore code ..., Ingo Molnar, (Thu May 8, 5:28 am)

Re: [patch] speed up / fix the new generic semaphore code ..., Matthew Wilcox, (Thu May 8, 6:20 am)

Re: [patch] speed up / fix the new generic semaphore code ..., Arjan van de Ven, (Thu May 8, 6:56 am)

Re: [patch] speed up / fix the new generic semaphore code ..., Ingo Molnar, (Thu May 8, 7:43 am)

Re: AIM7 40% regression with 2.6.26-rc1, Linus Torvalds, (Thu May 8, 7:58 am)

Re: [patch] speed up / fix the new generic semaphore code ..., Ingo Molnar, (Thu May 8, 8:01 am)

[git pull] scheduler fixes, Ingo Molnar, (Thu May 8, 8:10 am)

Re: [git pull] scheduler fixes, Adrian Bunk, (Thu May 8, 8:33 am)

Re: [git pull] scheduler fixes, Ingo Molnar, (Thu May 8, 8:41 am)

Re: [patch] speed up / fix the new generic semaphore code ..., Linus Torvalds, (Thu May 8, 9:02 am)

Re: [patch] speed up / fix the new generic semaphore code ..., Linus Torvalds, (Thu May 8, 11:30 am)

Re: [git pull] scheduler fixes, Adrian Bunk, (Thu May 8, 12:42 pm)

Re: [patch] speed up / fix the new generic semaphore code ..., Ingo Molnar, (Thu May 8, 1:19 pm)

Re: [patch] speed up / fix the new generic semaphore code ..., Linus Torvalds, (Thu May 8, 1:27 pm)

Re: [patch] speed up / fix the new generic semaphore code ..., Ingo Molnar, (Thu May 8, 2:45 pm)

Re: [patch] speed up / fix the new generic semaphore code ..., Ingo Molnar, (Thu May 8, 3:02 pm)

Re: [patch] speed up / fix the new generic semaphore code ..., Linus Torvalds, (Thu May 8, 3:55 pm)

Re: [patch] speed up / fix the new generic semaphore code ..., Linus Torvalds, (Thu May 8, 4:07 pm)

Re: [patch] speed up / fix the new generic semaphore code ..., Linus Torvalds, (Thu May 8, 4:14 pm)

Re: [patch] speed up / fix the new generic semaphore code ..., Alan Cox, (Thu May 8, 4:16 pm)

Re: [patch] speed up / fix the new generic semaphore code ..., Alan Cox, (Thu May 8, 4:27 pm)

Re: [patch] speed up / fix the new generic semaphore code ..., Linus Torvalds, (Thu May 8, 4:33 pm)

Re: Oi. NFS people. Read this., J. Bruce Fields, (Thu May 8, 6:43 pm)

Re: [patch] speed up / fix the new generic semaphore code ..., Ingo Molnar, (Thu May 8, 11:50 pm)

Re: [patch] speed up / fix the new generic semaphore code ..., Andi Kleen, (Fri May 9, 1:29 am)

Re: [git pull] scheduler fixes, Matthew Wilcox, (Sun May 11, 4:03 am)

Re: AIM7 40% regression with 2.6.26-rc1, Matthew Wilcox, (Sun May 11, 4:11 am)

Re: [git pull] scheduler fixes, Matthew Wilcox, (Sun May 11, 4:14 am)

Re: [git pull] scheduler fixes, Matthew Wilcox, (Sun May 11, 4:48 am)

Re: [git pull] scheduler fixes, Ingo Molnar, (Sun May 11, 5:50 am)

Re: [git pull] scheduler fixes, Ingo Molnar, (Sun May 11, 5:52 am)

Re: [git pull] scheduler fixes, Ingo Molnar, (Sun May 11, 6:01 am)

Re: [git pull] scheduler fixes, Matthew Wilcox, (Sun May 11, 6:02 am)

Re: [git pull] scheduler fixes, Matthew Wilcox, (Sun May 11, 6:06 am)

Re: [git pull] scheduler fixes, Matthew Wilcox, (Sun May 11, 6:26 am)

Re: [git pull] scheduler fixes, Ingo Molnar, (Sun May 11, 6:45 am)

Re: [git pull] scheduler fixes, Ingo Molnar, (Sun May 11, 6:54 am)

Re: [git pull] scheduler fixes, Ingo Molnar, (Sun May 11, 7:00 am)

Re: [git pull] scheduler fixes, Sven Wegener, (Sun May 11, 7:10 am)

Re: [git pull] scheduler fixes, Matthew Wilcox, (Sun May 11, 7:18 am)

Re: [git pull] scheduler fixes, Matthew Wilcox, (Sun May 11, 7:22 am)

Re: [git pull] scheduler fixes, Ingo Molnar, (Sun May 11, 7:32 am)

Re: [git pull] scheduler fixes, Ingo Molnar, (Sun May 11, 7:42 am)

Re: [git pull] scheduler fixes, Matthew Wilcox, (Sun May 11, 7:46 am)

Re: [git pull] scheduler fixes, Matthew Wilcox, (Sun May 11, 7:48 am)

Re: [git pull] scheduler fixes, Ingo Molnar, (Sun May 11, 8:19 am)

Re: [git pull] scheduler fixes, Matthew Wilcox, (Sun May 11, 8:29 am)

Re: [git pull] scheduler fixes, Linus Torvalds, (Sun May 11, 9:47 am)

Re: [git pull] scheduler fixes, Ingo Molnar, (Tue May 13, 7:11 am)

Re: [git pull] scheduler fixes, Matthew Wilcox, (Tue May 13, 7:21 am)

Re: [git pull] scheduler fixes, Ingo Molnar, (Tue May 13, 7:42 am)

Re: [git pull] scheduler fixes, Matthew Wilcox, (Tue May 13, 8:28 am)

Re: [git pull] scheduler fixes, Ingo Molnar, (Tue May 13, 10:13 am)

Re: [git pull] scheduler fixes, Linus Torvalds, (Tue May 13, 10:22 am)

Re: [git pull] scheduler fixes, Ingo Molnar, (Tue May 13, 2:05 pm)

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