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Date: Fri, 19 Aug 2011 13:28:19 +0400
From: Lev Serebryakov <lev@FreeBSD.org>
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To: Slawa Olhovchenkov <slw@zxy.spb.ru>
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Cc: freebsd-arch@freebsd.org
Subject: Re: FreeBSD problems and preliminary ways to solve
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Hello, Slawa.
You wrote 19 =C1=D7=C7=D5=D3=D4=C1 2011 =C7., 13:23:04:

>> There are a few known issues in terms of parallelism -- one is contention
>> between the ithread and user thread on per-TCP connection locks.  Anothe=
r is=20
>> that we still haven't managed to switch to per-CPU statistics for the ne=
twork=20
>> stack (which is fairly straight forward in a specific sense, but we'd li=
ke a=20
>> proper abstraction for it so we can generalise).
> After discussion in other place: may be perfomace improve if
> application resheduling on the same core, as processing incoming
> IP packet (hot CPU ca=D3he)?
  Yes, it is exactly what our admins done, and it helps, but if
streams will grow (and they WILL) here will be a little space to grow
up performance as well. But it is completely offtopic already.

--=20
// Black Lion AKA Lev Serebryakov <lev@serebryakov.spb.ru>