Messages in this thread | | | Date | Thu, 3 Sep 1998 01:04:23 -0500 (CDT) | From | Manoj Apte <> | Subject | Closure Re: 2us Interrupt latency's for Linux 2.0.xx |
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Ok, Jeff pointed out a similar discussion that happened just a few days ago.. I should have checked it out before posting the question.
Andreas posted a release of his lil package on Aug 27. He notes that linux shows periodic high interrupt latency due to large amount of time (~15us) spent in the bottom handler processing in IRQ0.
I suppose, the latencies I see every 30-35 second period are due to the same 'feature'. The linux bottom halfs and my interrupt run at slightly different frequencies and they probably have an lcm of about 30-35 seconds, causing them to clash periodically. (IRQ0 wins ofcourse since its highest priority)
I shall ofcourse do a lil more math to satisfy myself.. if anyone is interested .. I can keep you posted.
=========================================================================== -|- ------------(o)------------ MANOJ APTE 500 Louisville St. Computer Science Apt #59 Starkville, MS 39759 email: manoj@erc.msstate.edu phone: (601)-325-2476 (off) ENGINEERING RESEARCH CENTER. (601)-323-8160 (res) Mississippi State University.
homepage: http://www.erc.msstate.edu/~manoj ============================================================================
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