Improved accuracy of sched_trace measurement parsing.

* Measurements from tasks missing > 20% of their scheduling records are
ignored. This is configurable in config/config.py.
* Measurements which only have zero values are ignored.
* If either of these 2 situations are encountered print out a message the
first time using the common.log_once() method. See parse_exps.py for how
this is used with multiple threads.
* Measurements from a task's last job are ignored.
* Miss ratio is calculated only as a fraction of the number of jobs whose
matching release and completion records were found, not just release.

1 files changed, 4 insertions, 0 deletions

diff --git a/config/config.py b/config/config.py
index b631aa2..5e6f9e3 100644
--- a/config/config.py
+++ b/config/config.py
@@ -56,3 +56,7 @@ OVH_ALL_EVENTS   = ["%s_%s" % (e, t) for (e,t) in
 OVH_ALL_EVENTS  += ['RELEASE_LATENCY']
 # This event doesn't have a START and END
 OVH_BASE_EVENTS += ['RELEASE_LATENCY']
+
+# If a task is missing more than this many records, its measurements
+# are not included in sched_trace summaries
+MAX_RECORD_LOSS = .2