Axp-List Archive
RE: 2.2.16 Alpha: "Fix SMP rescheduling with lock held"

Subject: RE: 2.2.16 Alpha: "Fix SMP rescheduling with lock held"
From: Greg Lindahl (glindahl@hpti.com)
Date: Tue Jun 13 17:49:52 2000

> I take it these
> messages indicate the hang is around 2 seconds, which makes sense
> given I send 16MB over 100Mb Enet,

That depends on the detail. Are you running PVM in daemon mode or using
direct routing? Even if you were sending 16 MB in a single blocking send, it
should not hold the kernel lock while you're doing it. If so, it would be a
generic kernel bug...

strace is a very good utility (if it's functioning on alphas these days) to
figure out what kinds of system calls you're making.

-- g 

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