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Date:      Thu, 28 Oct 1999 01:25:14 -0700 (PDT)
From:      Matthew Jacob <mjacob@feral.com>
To:        freebsd-current@freebsd.org
Subject:   really draggy NFS access in -current?
Message-ID:  <Pine.BSF.4.10.9910280115530.97297-100000@beppo.feral.com>

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I have the following setup for an alpha PC164 running a current -current
(as in a kernel from the last day):

farrago.feral.com > mount
/dev/da0a on / (ufs, local, writes: sync 608 async 3306)
procfs on /proc (procfs, local)
mfs:30 on /tmp (mfs, asynchronous, local, writes: sync 2 async 7)
bird:/export/home on /home (nfs)
bird:/home/ncvs on /home/ncvs (nfs)
bird:/space5/freebsd/FreeBSD-current/sys on /space/sys (nfs)
bird:/space5/freebsd/FreeBSD-CVS on /cvs-src/FreeBSD-CVS (nfs)
bird:/space5/freebsd/distfiles on /usr/ports/distfiles (nfs)
/dev/da6a on /usr/obj (ufs, local, soft-updates, writes: sync 2 async 1)
/dev/da5a on /usr/src (ufs, local, soft-updates, writes: sync 2 async 19415)


Okay- I went home and left a cvs update going on /usr/src - reading from
a local CVSUP repository NFS mounted on /home/ncvs. The server is a
Sun SS1000 Solaris 2.6 box. 6 hours later, the cvs update is still chugging
slowly along- top shows cvs as:

  PID USERNAME      PRI NICE  SIZE    RES STATE    TIME   WCPU    CPU COMMAND
  275 mjacob          2   0  8704K  7616K sbwait   1:28  1.90%  1.90% cvs

most of the time. Just to check that something wasn't broken for da5,
I did a test dd writing to a file just now and it happily munched along
at 4MB/s.

The filesystem *is* a fat block fs:

  a:  4304896        0    4.2BSD     8192 32768    16   # (Cyl.    0 - 267*)

I suppose the blockage could be at the ufs end... Anyone have a pointer
as to what try to narrow this down- mainly to save me the trouble of
actually thinking about it (got a lot else on mind)? Unacceptably bad
something or others here.....





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