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Date:      Mon, 03 May 1999 23:37:51 -0600
From:      Warner Losh <imp@harmony.village.org>
To:        mobile@freebsd.org
Subject:   slow ep response...
Message-ID:  <199905040537.XAA55127@harmony.village.org>

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I was just able to recreate the slow ep response on my machine here
(granted, it is running my experiental pccard stuff, which is prone to
crashing), but I was seeing the following on an unloaded ethernet
connection:

% ping 10.5
PING 10.5 (10.0.0.5): 56 data bytes
64 bytes from 10.0.0.5: icmp_seq=0 ttl=255 time=931.404 ms
64 bytes from 10.0.0.5: icmp_seq=1 ttl=255 time=1924.132 ms
64 bytes from 10.0.0.5: icmp_seq=2 ttl=255 time=914.182 ms
64 bytes from 10.0.0.5: icmp_seq=3 ttl=255 time=1904.401 ms
64 bytes from 10.0.0.5: icmp_seq=4 ttl=255 time=894.465 ms
64 bytes from 10.0.0.5: icmp_seq=5 ttl=255 time=1884.667 ms
64 bytes from 10.0.0.5: icmp_seq=6 ttl=255 time=874.722 ms

This would certainly account for the problems you've been seeing.

I suspect it has something to do with interrupts, but I'm not sure
what.  I just wanted to let people know that I've seen this here...
It seems like it is interrupt related...

Warner


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