Date: Tue, 30 Jul 2002 14:06:27 -0700 (PDT) From: Bosko Milekic <bmilekic@FreeBSD.org> To: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/sys/kern subr_mbuf.c Message-ID: <200207302106.g6UL6Rek071715@freefall.freebsd.org>
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bmilekic 2002/07/30 14:06:27 PDT
Modified files:
sys/kern subr_mbuf.c
Log:
Make reference counting for mbuf clusters [only] work like in RELENG_4.
While I don't think this is the best solution, it certainly is the
fastest and in trying to find bottlenecks in network related code
I want this out of the way, so that I don't have to think about it.
What this means, for mbuf clusters anyway is:
- one less malloc() to do for every cluster allocation (replaced with
a relatively quick calculation + assignment)
- no more free() in the cluster free case (replaced with empty space) :-)
This can offer a substantial throughput improvement, but it may not for
all cases. Particularly noticable for larger buffer sends/recvs.
See http://people.freebsd.org/~bmilekic/code/measure2.txt for a rough
idea.
Revision Changes Path
1.24 +37 -49 src/sys/kern/subr_mbuf.c
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