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On Fri, 30 Mar 2007, Nick Piggin wrote: > > I slightly modified it to use cycles: > > > > http://www.xmailserver.org/qspins.c > > Slightly more than slightly ;) > > You want to have a delay _outside_ the critical section as well, for > multi-thread tests, otherwise the releasing CPU often just retakes > the lock (in the unqueued lock case). As I said, most kernel code > should _not_ be dropping and retaking locks. Yeah. ATM it mostly does double-takes. - Davide - 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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