Messages in this thread | | | Date | Wed, 10 Sep 2008 18:18:20 -0600 | From | Robert Hancock <> | Subject | Re: forcedeth: option to disable 100Hz timer (try 2) |
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Andrew Morton wrote: > On Tue, 9 Sep 2008 23:34:35 +0400 > Mikhail Kshevetskiy <mikhail.kshevetskiy@gmail.com> wrote: > >> On some hardware no TX done interrupts are generated, thus special >> 100Hz timer interrupt is required to handle this situation properly. >> Other device do not require that timer interrupt feature. >> >> Forcedeth has a DEV_NEED_TIMERIRQ flag to mark the broken devices. >> Unfortunately, nobody know the actual list of broken devices, so all >> device has this flag on. Other problem, this flag is not user visible, >> so the kernel recompilation is required to disable timer interrupts and >> test a device. >> >> This patch add a "disable_timerirq" option to disable interrupt >> timer mentioned above. This may be extremely useful for laptop users. > > Why do you feel that the timer-based completions need to be disabled? > Is it causing some problem?
100 unnecessary CPU wakeups per second imposes some power usage cost, especially on laptops with CPU C-states..
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