BP warming adds three stats (naming chosen to match the O3 CPU):
1. CPU.Branches
2. CPU.predictedBranches
3. CPU.BranchMispred
2 & 3 are only enabled when BP warming is active since they wouldn't
make sense without an active branch predictor. The first one on the
other hand is always active and counts the total number of branches
fetched and executed. This should be the only new statistic and the
/only/ field that changed in any of the stat files. Also, the only
regressions that should have changed due to this are the ones using the
SimpleAtomic or SimpleTiming CPU.
//Andreas
On 2014-02-12 12:40, Andreas Hansson wrote:
Hi Andreas,
Just to clarify, are you saying that BP warming should not cause any stats
changes unless it is enabled? How come all the regressions changed then?
Before bumping the stats it would be good to pin-point what caused it,
that¹s all.
Andreas H
On 12/02/2014 10:30, "Andreas Sandberg" <[email protected]> wrote:
This is probably caused by the addition of support for branch predictor
warming. This adds a statistic counting branches in the simple CPUs.
Branchpredictor statistics are not shown unless BP warming is enabled.
It'd be great if someone could update the regressions with the new
statistics. I had some issues running the regressions in our cluster
last time I tried and I really don't have time to debug it at the moment.
//Andreas
On 2014-02-12 00:32, Nilay Vaish wrote:
Did anyone take a look at what went wrong? Things were fine as per
the run on Sunday.
--
Nilay
On Tue, 11 Feb 2014, Cron Daemon wrote:
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See /z/m5/regression/regress-2014-02-11-03:00:01 for details.
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