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Windows 7 - DPC Latency Spikes
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<blockquote data-quote="mm1352000" data-source="post: 828990" data-attributes="member: 82144"><p>Hi</p><p></p><p>ISR = interrupt service routine</p><p>DPC = deferred procedure call</p><p></p><p>You can read about what they mean on Wikipedia or elsewhere but basically the lower the values in all three columns, the better. I'd be paying attention to the top 3 devices in the list:</p><p></p><p>network</p><p>IDE/ATA HDD controllers (I think)</p><p>USB</p><p></p><p>Your USB controller seems to have a particularly high average execution time for the ISR which causes many DPCs (at least that is the way I read it). Probably the worst culprit.</p><p>The network controller has a higher average execution time but less DPCs - perhaps this driver causes occasional big delays randomly.</p><p></p><p>mm</p></blockquote><p></p>
[QUOTE="mm1352000, post: 828990, member: 82144"] Hi ISR = interrupt service routine DPC = deferred procedure call You can read about what they mean on Wikipedia or elsewhere but basically the lower the values in all three columns, the better. I'd be paying attention to the top 3 devices in the list: network IDE/ATA HDD controllers (I think) USB Your USB controller seems to have a particularly high average execution time for the ISR which causes many DPCs (at least that is the way I read it). Probably the worst culprit. The network controller has a higher average execution time but less DPCs - perhaps this driver causes occasional big delays randomly. mm [/QUOTE]
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