On 2004-10-18, Matthew Dillon <dillon@apollo.backplane.com> wrote:
> Here is a new patch set. I missed a case in cache_nlookup(). The other
> patch will work but might still result in unnecessary vnlru process
> wakeups.
>
> The hysteresis is designed such that in a heavily loaded system only 1
> out of 10 calls to the namecache will eat cpu cycles cleaning up negative
> cache entries.
ok, i've tested it. looks like the problem with vnlru is resolved. i see
a lot of fun HL/LH like
Oct 19 01:05:36 apocalypse kernel: HLHLH
Oct 19 01:05:36 apocalypse kernel: LHLHL
Oct 19 01:05:37 apocalypse kernel: HL
Oct 19 01:05:45 apocalypse kernel: HLHLHL
Oct 19 01:05:46 apocalypse kernel: HL
Oct 19 01:05:46 apocalypse kernel: HLHL
Oct 19 01:05:46 apocalypse kernel: HL
and one
Oct 19 01:13:40 apocalypse kernel: HLX
but cvsup eats too much cpu, while updating - 75%-85%, but while fetching
only new files only 5% of cpu.
--