GC failure w/ THREAD_LOCAL_ALLOC ?

[Bryce McKinlay]

Jeff Sturm wrote:

>On Thu, 21 Mar 2002, Bryce McKinlay wrote:
>
>>Its a 650Mhz mobile Pentium 3, redhat kernel 2.4.9-13, redhat 
>>glibc-2.2.4-19.3. I can try it on some other machines later to be sure.
>>
>
>I'm having trouble reproducing the GCTest failure.  My configuration is
>similar to Bryce's, though with glibc-2.2.4-13 and kernel 2.4.7-10 on a
>PIII.
>
>It appeared to hang the very first time I ran it, and never again
>thereafter.
>

I confirmed that I can also reproduce the problem on a 2x 450Mhz celeron 
machine, this time with a 2001-12-03 GCC. It is harder to reproduce on 
that machine, only failing about 1 in 3 attempts rather than nearly 100% 
on the mobile P3. But here's the thing: if you run another task on the 
machine (eg a long running benchmark), it seems to greatly increase the 
chance of the race occuring. It almost never happens on an otherwise 
idle machine!

regards

Bryce.