Messages in this thread | | | Date | Tue, 4 Nov 2003 16:39:59 -0500 | From | "Bill Rugolsky Jr." <> | Subject | Re: ext3 performance inconsistencies, 2.4/2.6 |
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On Tue, Nov 04, 2003 at 12:30:23PM -0800, Linus Torvalds wrote: > But there really should be zero contention on the stdio data structures, > so the locking would have to be _seriously_ broken to make that kind o > fdifference (not necessarily buggy, but seriously badly implemented). > > A non-contended lock should be at most one locked instruction if well > done, both on LinuxThreads and NPTL.
The results that I just posted are also for Red Hat 9, kernel 2.4.20-20.9.
rugolsky@ti31: getconf GNU_LIBPTHREAD_VERSION NPTL 0.34
Ulrich's release notes for nptl-0.57 says:
The changes are numerous and most of them were made by Jakub:
...
~ better stdio locking
I don't have my laptop running Fedora handy, but that's the next thing to test.
Regards,
Bill Rugolsky - 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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