2003-09-26 09:30:12

by jrc

[permalink] [raw]
Subject: Re; Strange serialisation with slow operations?

Tried the same test using a Solaris 8 client and didn't experience the
blocking behaviour. Ethereal shows that "cat a" used UDP ports:
2049;1023 and that "cat b" used ports 2049;1022.

This suggests to me that perhaps the blocking is occuring at the UDP
level. Any comments?
--
John Connett



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2003-09-26 11:14:26

by jrc

[permalink] [raw]
Subject: Re: Re; Strange serialisation with slow operations?

[email protected] wrote:
> This suggests to me that perhaps the blocking is occuring at the UDP
> level. Any comments?

Tried a similar test using the NFS client from Microsoft Services for
UNIX 3.0 running on Windows 2000 SP2.

The first few attempts to "type a" produced "The semaphore timeout
period has expired." and no output. However, once it had settled
down, "type a" produced output after the expected delay without
blocking "type f". Ethereal showed that the read requests were going
over the wire and that both used UDP ports 1024;948.

This seems to cast doubt on my sugguestion that the blocking was
occuring at the UDP level ...
--
John Connett



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