On Wed, 2003-05-21 at 19:19, Nivedita Singhvi wrote:

quoted

quoted

I think this is what I've seen a few times when using distcc.

Does anyone know if the other hangs are seen when the app is using 
TCP_CORK (like distcc does) ?

We had observed some hangs during SpecWeb99 benchmark runs.
Unfortunately, we managed to burn down the machine and have
yet to rerun the benchmark. No other workload seems to
be observing them.

I'm trying to excavate the one incomplete trace I had of
that hang, if possible. IIRC it was using sendfile(), so
probably also using TCP_CORK, though dont know that for
sure.

Can anyone tell me what to do to reproduce this?

I've now tried my distcc stuff again. With TCP_CORK enabled I don't have
any problem reproducing the hangs, 1 in 3 shows at least one hang. But
so far I havn't been able to reproduce it with TCP_CORK disabled. I'll
keep compiling a few more times, I've only run 10 compilations so far.

When using distcc you know you have a hang when it stops at the
object-linking for a while waiting for one process to finish.

-- 
/Martin