The patch "cfq-iosched: defer slice activation to first request being active" http://www.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=c ommitdiff;h=44f7c16065c83060cbb9dd9b367141682a6e2b8e;hp=99f9628aba4d8fb3 b8d955c9efded0d0a1995fad
Sysbench fileio (random read/write mix) -15% Tiobench sequential write -3% Tiobench random write -5% Iozone record re-write -21% Iozone mmap sequential read -20% Iozone mmap random write +45% Aio-stress direct sequential read +29% For other 3 tiobench, 7 aiostress and 13 iozone tests the result changes are less than variation. Considered patch does not impact on performance if all threads have equal IO activity (tiobench). If single thread has IO activity the performance becomes unstable and is decreased mainly. Leonid - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
