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Message-ID: <4976B3D3.70501@shaw.ca> Date: Tue, 20 Jan 2009 23:34:11 -0600 From: Robert Hancock <hancockr@...w.ca> To: linux-kernel@...r.kernel.org Cc: linux-kernel@...r.kernel.org Subject: Re: disabling interupts linux wrote: > Please advise if this question is OT. (If so, where can I post it or > read more about said topic?) > > I have an application that grabs frames from a frame grabber. It is > dropping frames, sometimes, 30 frames at a time. I suspect this is > occuring due to background tasks or something like that interupting the > app. In the future I may go to a hard RT linux, but for now, I just > have time to try to reduce the number and frequency of frame drops. > I read on some linux websites that one can disable interrupts to > increase performance and/or reduce latencies. > My questions are > > 1. Is this an acceptable practice? If not, what are my other options? > > 2. How can I do this? > Would I use: > void local_irq_save(unsigned long flags); > void local_irq_restore(unsigned long flags); > > > 3. What interupts should I consider disabling? > > Ed You haven't provided nearly enough details in order to answer this question. What kind of frame grabber, what driver is it using? Where do you think the frames are being dropped? -- 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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