Date: Sat, 3 Aug 2002 22:36:22 -0700 (PDT) From: Luigi Rizzo <luigi@FreeBSD.org> To: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/sys/sys mbuf.h src/sys/kern uipc_mbuf.c Message-ID: <200208040536.g745aMb8037891@freefall.freebsd.org>
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luigi 2002/08/03 22:36:22 PDT
Modified files: (Branch: RELENG_4)
sys/sys mbuf.h
sys/kern uipc_mbuf.c
Log:
MFC: add m_getcl() as a preferred way to get an mbuf with an
attached cluster.
Now that we have this interface both in -current and -stable, each
network device driver can replace the call to MGETHDR/MCLGET with
calls to m_getcl(), saving (on -stable) about 400 bytes and the
associated cache pollution.
Also, slightly modify m_freem() so that it keeps a small free list
(controlled by kern.ipc.mcl_pool_max) of such buffers for use in m_getcl().
Even a small size such as 10 elements gives about 10% improvement
in the peak forwarding performance in bridges and routers.
Revision Changes Path
1.51.2.16 +65 -2 src/sys/kern/uipc_mbuf.c
1.44.2.15 +1 -0 src/sys/sys/mbuf.h
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