RFR(XXXS): 8000311: G1: ParallelGCThreads==0 broken

[Jon Masamitsu]

John,

Would you mind passing in the no_of_gc_workers into
adjust_desired_plab_sz()?

G1CollectedHeap::evacuate_collection_set()
     release_gc_alloc_regions(n_workers)
         _survivor_plab_stats.adjust_desired_plab_sz(no_of_gc_workers);
         _old_plab_stats.adjust_desired_plab_sz(no_of_gc_workers);


ParNewGeneration::collect()
     adjust_desired_plab_sz(n_workers)

Jon

On 10/01/12 14:58, John Cuthbertson wrote:
> Hi Everyone,
>
> Can I have a couple of volunteers look over the changes for this fix? 
> The webrev can be found at: 
> http://cr.openjdk.java.net/~johnc/8000311/webrev.0/
>
> Summary:
> While testing the changes for another CR, I ran into this divide by 
> zero error. I decided to make a separate CR so that the change can be 
> backported to hs24 - which also has the issue.
>
> Testing:
> The original test case with and without PGCT=0 and PrintPLAB enabled.
>
> Thanks,
>
> JohnC