Date: Sun, 22 Mar 2009 22:07:52 +0000 (UTC) From: Robert Watson <rwatson@FreeBSD.org> To: cvs-src-old@freebsd.org Subject: cvs commit: src/sys/cddl/dev/dtnfsclient dtnfsclient.c src/sys/modules/dtrace Makefile src/sys/modules/dtrace/dtnfsclient Makefile src/sys/modules/dtrace/dtraceall dtraceall.c src/sys/nfsclient nfs_krpc.c src/sys/sys dtrace_bsd.h Message-ID: <200903222208.n2MM8pdt031486@repoman.freebsd.org>
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rwatson 2009-03-22 22:07:52 UTC
FreeBSD src repository
Modified files:
sys/modules/dtrace Makefile
sys/modules/dtrace/dtraceall dtraceall.c
sys/nfsclient nfs_krpc.c
sys/sys dtrace_bsd.h
Added files:
sys/cddl/dev/dtnfsclient dtnfsclient.c
sys/modules/dtrace/dtnfsclient Makefile
Log:
SVN rev 190293 on 2009-03-22 22:07:52Z by rwatson
Add dtnfsclient, a first cut at an NFSv2/v3 client reuest DTrace
provider. The NFS client exposes 'start' and 'done' probes for NFSv2
and NFSv3 RPCs when using the new RPC implementation, passing in the
vnode, mbuf chain, credential, and NFSv2 or NFSv3 procedure number.
For 'done' probes, the error number is also available.
Probes are named in the following way:
...
nfsclient:nfs2:write:start
nfsclient:nfs2:write:done
...
nfsclient:nfs3:access:start
nfsclient:nfs3:access:done
...
Access to the unmarshalled arguments is not easily available at this
point in the stack, but the passed probe arguments are sufficient to
to a lot of interesting things in practice. Technically, these probes
may cover multiple RPC retransmits, and even transactions if the
transaction ID change as a result of authentication failure or a
jukebox error from the server, but usefully capture the intent of a
single NFS request, such as access, getattr, write, etc.
Typical use might involve profiling RPC latency by system call, number
of RPCs, how often a getattr leads to a call to access, when failed
access control checks occur, etc. More detailed RPC information might
best be provided by adding a krpc provider. It would also be useful
to add NFS client probes for events such as the access cache or
attribute cache satisfying requests without an RPC.
Sponsored by: Google, Inc.
MFC after: 1 month
Revision Changes Path
1.1 +343 -0 src/sys/cddl/dev/dtnfsclient/dtnfsclient.c (new)
1.5 +1 -0 src/sys/modules/dtrace/Makefile
1.1 +13 -0 src/sys/modules/dtrace/dtnfsclient/Makefile (new)
1.3 +1 -0 src/sys/modules/dtrace/dtraceall/dtraceall.c
1.3 +75 -0 src/sys/nfsclient/nfs_krpc.c
1.2 +12 -0 src/sys/sys/dtrace_bsd.h
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