Change default period to 100 ms, which seems to help cfs at least...

rt is still somewhat broken.
2012-03-23 18:18:48 -07:00
parent beb05a71c8
commit 44af37bc2b
1 changed files with 5 additions and 1 deletions
@@ -518,7 +518,11 @@ class CPULimitedHost( Host ):
        self.cgroup = 'cpu,cpuacct:/' + self.name
        errFail( 'cgcreate -g ' + self.cgroup )
        errFail( 'cgclassify -g %s %s' % ( self.cgroup, self.pid ) )
-        self.period_us = kwargs.get( 'period_us', 10000 )
+        # BL: Setting the correct period/quota is tricky, particularly
+        # for RT. RT allows very small quotas, but the overhead
+        # seems to be high. CFS has a mininimum quota of 1 ms, but
+        # still does better with larger period values.
+        self.period_us = kwargs.get( 'period_us', 100000 )
        self.sched = sched

    def cgroupSet( self, param, value, resource='cpu' ):