Date: Mon, 10 Mar 2008 03:15:19 +0000 (UTC) From: Jeff Roberson <jeff@FreeBSD.org> To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/sys/kern sched_ule.c Message-ID: <200803100315.m2A3FKc6019027@repoman.freebsd.org>
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jeff 2008-03-10 03:15:19 UTC
FreeBSD src repository
Modified files:
sys/kern sched_ule.c
Log:
Reduce ULE context switch time by over 25%.
- Only calculate timeshare priorities once per tick or when a thread is woken
from sleeping.
- Keep the ts_runq pointer valid after all priority changes.
- Call tdq_runq_add() directly from sched_switch() without passing in via
tdq_add(). We don't need to adjust loads or runqs anymore.
- Sort tdq and ts_sched according to utilization to improve cache behavior.
Sponsored by: Nokia
Revision Changes Path
1.228 +52 -52 src/sys/kern/sched_ule.c
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