[aarch64-port-dev ] JTREG, SPECjbb2013 and Hadoop/Terasort results for OpenJDK 8 on AArch64

[Edward Nevill]

On Mon, 2014-12-15 at 14:10 +0000, Andrew Haley wrote:
> On 12/15/2014 09:37 AM, Edward Nevill wrote:
> > Client 48.67 / Client 2014-04-01 (43.00): 1.13x
> > Server 84.52 / Server 2014-04-01 (71.00): 1.19x
> 
> There's a slight decline in performance here.  Do we know if this
> is real?

I don't believe it is real. I do not see any change that would cause this. However I have observed that performance seems to degrade over time.

For example here are the last few results for the hadoop terasort using server-release.

12/12: 84.52
12/04: 87.67
11/28: 88.77
11/20: 82.54

The only significant difference between 11/20 and 11/28 is the board was rebooted. It is possible the performance change is due to memory fragmentation causing difficulty using large pages. Or maybe some zombie processes lying around.

So I have rebooted the board and restarted the tests. Results in 20hrs.

Maybe we should reboot the board in a cron job before doing the tests.

All the best,
Ed