Messages in this thread | | | Date | Thu, 26 Sep 2002 06:17:40 -0700 | From | William Lee Irwin III <> | Subject | Re: 2.5.38-mm3 |
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On Thu, Sep 26, 2002 at 05:42:44AM -0700, William Lee Irwin III wrote: >> This is only aggravated by cacheline bouncing on SMP. The reductions >> of system cpu time will doubtless be beneficial for all.
On Thu, Sep 26, 2002 at 06:35:58PM +0530, Dipankar Sarma wrote: > On SMP, I would have thought that only sharing the fd table > while cloning tasks (CLONE_FILES) affects performance by bouncing the rwlock > cache line. Are there a lot of common workloads where this happens ? > Anyway the files_struct_rcu patch for 2.5.38 is up at > http://sourceforge.net/project/showfiles.php?group_id=8875&release_id=112473
It looks very unusual, but it is very real. Some of my prior profile results show this. I'll run a before/after profile with this either tonight or tomorrow night (it's 6:06AM PST here -- tonight is unlikely).
Cheers, Bill - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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