Messages in this thread | | | Date | Tue, 13 Jul 2004 07:40:28 -0700 | From | William Lee Irwin III <> | Subject | Re: preempt-timing-2.6.8-rc1 |
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On Tue, Jul 13, 2004 at 05:28:05AM -0700, William Lee Irwin III wrote: >> This patch uses the preemption counter increments and decrements to time >> non-preemptible critical sections. >> This is an instrumentation patch intended to help determine the causes of >> scheduling latency related to long non-preemptible critical sections. >> Changes from 2.6.7-based patch: >> (1) fix unmap_vmas() check correctly this time >> (2) add touch_preempt_timing() to cond_resched_lock() >> (3) depend on preempt until it's worked out wtf goes wrong without it
On Tue, Jul 13, 2004 at 10:36:00AM -0400, Joe Korty wrote: > You preemption-block hold times will improve *enormously* if you move all > softirq processing down to the daemon (and possibly raise the daemon to > one of the higher SCHED_RR priorities, to compensate for softirq processing > no longer happening at interrupt level).
Plausible. Got a patch?
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