Hello, Andriy.
You wrote 12 января 2012 г., 13:54:41:
>> Switching to 4BSD helps. 4BSD works as usual: all CPU time is
>> interrupts and network thread, system is responsive under heaviest load,
>> normal operations of DNS, DHCP and hostapd.
> How reproducible is this result?
100%
> In other words, have you definitely ruled out all other factors besides the
> scheduler?
I have two almost-identical NanoBSD images which differs in one line in
kernel
config -- option about scheduler. Worlds are exactly the same, only kernels
were
rebuilt.
Alexander Motin suggests, that switching scheduler could slightly
change stack consumption, which triggers switching to ng_queue
instead of direct calls.
Really, here is diff between "md5" of all files of one and other
images:
blob# diff ~lev/bsd-image.md5sums ~lev/ule-image.md5sums
74c74
< MD5 (./boot/kernel/kernel) = 3bb0dd757628b5065d27ee5e7fc22eb3
---
> MD5 (./boot/kernel/kernel) = 5ba379d2c73e1277566f4bbcb618a9f2
618c618
< MD5 (./conf/base/var/log/userlog) = a827af82c1f780687706b19c7d94b29e
---
> MD5 (./conf/base/var/log/userlog) = fc289b66ae6cb23f9b24b694bf12157b
15678c15678
< MD5 (./var/log/userlog) = a827af82c1f780687706b19c7d94b29e
---
> MD5 (./var/log/userlog) = fc289b66ae6cb23f9b24b694bf12157b
--
// Black Lion AKA Lev Serebryakov <l...@freebsd.org>
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