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Re: Cygwin1.dll problem with Hyperthreaded machines.
- From: David Chatterton <chatz at melbourne dot sgi dot com>
- To: Chuck McDevitt <cmcdevitt at ABINITIO dot COM>
- Cc: cygwin at cygwin dot com
- Date: Tue, 31 Aug 2004 07:10:19 +1000
- Subject: Re: Cygwin1.dll problem with Hyperthreaded machines.
- Organization: SGI
- References: <OFDBD11567.72234441-ON85256F00.00560135-85256F00.00564CBC@abinitio.com>
- Reply-to: chatz at melbourne dot sgi dot com
Chuck,
We have a build environment for a reasonably large piece of code
that several people could be building at the same time. On a dual
800MHz P3 and even a quad 550MHz box we had no problems, but upgrading
to a dual 1.8GHz AMD box improved build times dramatically but
the vast majority of builds fail with:
- Microsoft's compiler reporting missing source file. I suspect
the environment and/or current working directory is not
setup correctly everytime a prcess is created. Rerun make and
it works. Very strange.
- Thread activation errors which kill the build and the running
shell.
rsync is also unreliable as it regularly hangs, but its unclear if
that is related.
I will also investigate providing a box, but that might be the
easy part. Providing a test case that does not rely on our code
base might be more of a challenge.
David
Chuck McDevitt wrote:
Here at the company I work for, we have one of our developers spending
half his time trying to track down this problem, but so far with no luck.
He did find that forcing processor affinity helps avoid the problem, but
that's not much of a solution.
I keep trying to convince management to send a hyperthreaded machine that
shows the problem to Christopher or Corinna, but they keep nixing the idea
(I don't understand why).
--
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