Re: [Jikesrvm-core] system stability

[Ian R. <ian...@ma...>]

Hi,

Just to note that the regressions appear ok to me with 1 processor, but
with -X:processors=2 I get the same failures. I've noticed that
AWT/Swing isn't stable with -X:processors=2 too. There's also a problem
with powersaving effecting RDTSC on AMD64x2 processors. I don't know if
this can help with anything, but the traces look familiar to ones I've
seen here running with >1 processor.

Thanks,

Ian

David P Grove wrote:
> last night's regression run was not very pretty.
> 
> A number of new failures, many of which take the form of either assertions 
> failures during GC stack scanning or segfaults during GC scanning of heap 
> (which could also be a symptom of stack scanning problems).  If we're 
> lucky, this all has the same root cause so fixing the assertion problem 
> could fix the other problems as well. 
> 
> I'm fairly sure the switch to classpath 0.91 was not the problem, since 
> I'd been testing that the middle of last week and didn't see any problems. 
>  So some combination of GC changes + other changes is the most likely 
> thing to look at.  I'm going to go ahead and test this theory by running 
> my exact system against 0.90 and 0.91, but unless I post something else 
> assume it is not the classpath version that is the problem. 
> 
> I'd like to suggest that people try to get these problems straightened out 
> before we do much more forward development.  With this last batch of 
> failures I think we've tipped over to the point where the system is 
> unstable enough that running regression tests against new functionality 
> will not be sufficient to catch bugs, since new problems can be masked by 
> the exisiting crashes.
> 
> --dave
> 
> 
> 
> 
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