RFR (S): 8206453: Taskqueue stats should count real steal attempts, not calls to GenericTaskQueueSet::steal

[Kim Barrett]

> On Jul 6, 2018, at 10:11 AM, Thomas Schatzl <thomas.schatzl at oracle.com> wrote:
> 
> Hi all,
> 
>  can I have reviews for some small change to how successful steals and
> steal attempts in taskqueue statistics are gathered? In particular, as
> the subject of the CR suggests, the "steal attempts" counter the number
> of calls to GenericTaskQueueSet::steal() which internally actually
> attempts stealing quite often.
> 
> This makes a useful comparison of steal attempts to successful steals
> impossible and misleading.
> 
> The calls to GenericTaskQueueSet::steal are mostly reflected to the
> number of termination attempts that is already counted elsewhere (ie.
> steal attempts - successful steals), so it does not really give new
> information.
> 
> CR:
> https://bugs.openjdk.java.net/browse/JDK-8206453
> Webrev:
> http://cr.openjdk.java.net/~tschatzl/8206453/webrev/
> Testing:
> local compilation and use with and without TASKQUEUE_STATS.
> 
> Thanks,
>  Thomas

Please change record_attempt to record_steal_attempt.
Otherwise, looks good.  I don't need a new webrev for that renaming.