Date: Fri, 11 Oct 1996 17:15:31 -0700 (PDT) From: Tom Bartol <bartol@salk.edu> To: Hidetoshi Shimokawa <simokawa@sat.t.u-tokyo.ac.jp> Cc: dfr@render.com, current@FreeBSD.ORG Subject: Re: NFS weirdness in -current Message-ID: <Pine.NEB.3.93.961011165015.2380C-100000@pauling.salk.edu> In-Reply-To: <9764.844967087@sat.t.u-tokyo.ac.jp>
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On Fri, 11 Oct 1996, Hidetoshi Shimokawa wrote:
> bartol> Yes, it does sound like that problem now that you point it out.
> bartol>
> bartol> Hidetoshi, is there anything I can do to help out?
>
> I already made a patch and send it to freebsd-lite2 list.
> (I guess you can find it by mailing list archive search,
> keyword is "Delayed write patch".)
>
> Doug will commit it to -current tomorrow(it may depends on time zone :-).
> If you cannot wait it, I will send you the patch.
>
> Please try the patch.
>
> /\ Hidetoshi Shimokawa
> \/ simokawa@sat.t.u-tokyo.ac.jp
> PGP public key: finger -l simokawa@sat.t.u-tokyo.ac.jp
>
Hi,
Sorry for the delay in getting back you on trying this patch. I see that
the patch has already been committed, great! Here are my results:
1) the patch fixes the anomalous behavior -- nfs operations no longer
block other nfs operations when they shouldn't.
2) with vfs.nfs.dwrite=1, nfs reads go at 400KBps and nfs writes go at
600KBps! Not too shabby! During a write of a file called "ick", do an
"ls -al ick" in another xterm shows the file's size increasing in large
chunky, and infrequent increments.
3) with vfs.nfs.dwrite=0, nfs reads go at 250KBps and nfs writes go at
250KBps. "ls -al ick" shows the file's size increasing smoothly over
time.
4) with 2.2-960801-SNAP we got 600KBps reads and 300KBps writes so a few
things have changed in -current. "ls -al ick" shows file's size
increasing somewhat smoothly, sort of half-way between behavior
described in 2 and 3 above.
In the tests above we NFS mounted a filesystem served by an Auspex NS200
running Auspex kernel 1.8M1Z1 (a SunOS 4.1.4 variant). We were reading or
writing a 10MB file over a dedicated switched 10BT ethernet connection to
the Auspex.
Hope this helps,
Tom
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