Closed Bug 385957 Opened 13 years ago Closed 11 years ago

2%-3% Tp/Tp2 regression evening of 2007-06-25


(Core :: General, defect, P2)






(Reporter: dbaron, Assigned: dietrich)




(Keywords: perf, regression)

There was a 2%-3% Tp and Tp2 regression on both Linux and Windows on the Firefox tinderbox a little before midnight on 2007-06-25.  That is, on the tinderboxes:
Linux bl-bldlnx01 Dep fx-linux-tbox perf test
WINNT 5.1 bl-bldxp01 Dep fx-win32-tbox perf test

The first of these tinderboxes reports more often and has more stable numbers than the second, but this is the size regression that's a little hard to pick out as a particular cycle even though there was clearly a change.  The most likely window for the regression is one of the three cycles between 20:52 and 22:23 (MOZ_CO_DATE).
We don't seem to have any talos performance numbers for the trunk (only for the branch).
I just tried backing out bug 384836 and bug 385686.
(That said, given the quality of the numbers we have, I'm not even all that confident in the wide window I gave above.)
Bug 327350 should not adversely affect Tp, as it's only run during initialization of the History service, which occurs once at application startup.
Tp2 pretty clearly went down after backing out those two patches, so it was one of the 2, at least for the Linux numbers, so I'm reopening the tree.
So it actually wasn't clear that it went down after backing those out -- it probably was just one low cycle.  So it seems like it might be one of the other patches in the URL above, or maybe even some other patches at nearby times.
backed out bug 327350
(In reply to comment #8)
> backed out bug 327350

i've reverted this backout until windows perf #s are back and there's less
Flags: blocking1.9?
David, do you still think this might block?
It probably should, but we need to generate some more stable numbers to figure it out.
Ok.  +'ing this.  Marking as P2 so we get to it first thing after Beta 2.  
Flags: blocking1.9? → blocking1.9+
Priority: -- → P2
Dietrich - can you either take this or find the right owner
Assignee: nobody → dietrich
Blocks: 397945
Flags: tracking1.9+ → wanted-next+
I'm going through and marking old performance regression bugs as INCOMPLETE that are likely too old to be valid or get any traction on them.

Please re-open if you have more information or can demonstrate the regression still exists.
Closed: 11 years ago
Resolution: --- → INCOMPLETE
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