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Message-ID: <20080831142820.40029b56@infradead.org> Date: Sun, 31 Aug 2008 14:28:20 -0700 From: Arjan van de Ven <arjan@...radead.org> To: Davide Libenzi <davidel@...ilserver.org> Cc: Linux Kernel Mailing List <linux-kernel@...r.kernel.org>, tglx@...x.de, Ingo Molnar <mingo@...e.hu>, Linus Torvalds <torvalds@...ux-foundation.org>, Arnd Bergmann <arnd@...db.de> Subject: Re: [patch v2 0/5] Nano/Microsecond resolution for select() and poll() On Sun, 31 Aug 2008 14:13:45 -0700 (PDT) Davide Libenzi <davidel@...ilserver.org> wrote: > On Sun, 31 Aug 2008, Arjan van de Ven wrote: > > > Note: > > even though poll() (as opposed to ppoll()) only accepts milliseconds > > as userspace interface, the behavior will still improve because the > > current time no longer needs to be rounded up to the next jiffie, > > so on average a 500 microseconds behavior improvement. > > Another way to get down in the timeout resolution for newer kernels, > and still supporting the syscalls with millisec timeouts, is to use > timerfds. perhaps, but once you have to change the app you can also make it use ppoll() rather than poll().. that's a VERY minute change. -- If you want to reach me at my work email, use arjan@...ux.intel.com For development, discussion and tips for power savings, visit http://www.lesswatts.org -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.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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