Messages in this thread |  | | Date | Fri, 20 Aug 2004 15:30:31 +0200 | From | Ingo Molnar <> | Subject | [patch] voluntary-preempt-2.6.8.1-P5 |
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i've uploaded the -P5 patch:
http://redhat.com/~mingo/voluntary-preempt/voluntary-preempt-2.6.8.1-P5
Changes since -P4:
- increase PERCPU_ENOUGH_ROOM to avoid percpu overflow on SMP. (Mark H Johnson)
- reduce ZAP_BLOCK_SIZE to 16 when vp != 0. This pushes the exit latency down to below 100 usecs on Lee Revell's box.
- added a preempt_count field to /proc/latency_trace. This makes it easier to spot IRQ contexts and generally it gives a nice overview of how the preemption depth changes. It should also help us debug those 900usec weirdnesses related to cpu_idle. (if they still occur)
- made the tcp packet-queue collapsing dependent on VOLUNTARY_PREEMPT.
- fixed 10-20 msec latencies triggered by 'netstat', which occur when there are lots of sockets on a box.
- rediffed against 2.6.8.1 for the patch to apply without fuzz
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