Rinaldo DiGiorgio created MESOS-5541:
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Summary: OSX 10.10.5 and mesos 0.28.1 -- 10 to 20 X difference in
sleep() method compared to non mesos
Key: MESOS-5541
URL: https://issues.apache.org/jira/browse/MESOS-5541
Project: Mesos
Issue Type: Bug
Components: cgroups
Reporter: Rinaldo DiGiorgio
We are running the following Java application and we are getting
unreasonable deltas in the actual amount time slept. On linux the results are
as expected 10, 11, 12 but mostly 10ms. Can you suggest any changes we can
make or is this a known issue or a new issue to be investigated? When we run
the same code on the same instance of OSX 10.10.5 without mesos -- we get the
expected results.
public class SleepLatency {
static final int COUNT = 100;
static final long DELAY = 10L;
public static void main(String[] args) throws Exception {
long tstart = System.currentTimeMillis();
for (int i = 0; i < COUNT; i++) {
long t0 = System.currentTimeMillis();
Thread.sleep(DELAY);
long t1 = System.currentTimeMillis();
System.out.printf("loop %3d delay %4d ms%n", i, t1 - t0);
}
long tfinish = System.currentTimeMillis();
System.out.printf("total time = %5d ms%n", tfinish - tstart);
}
}
====== OSX RESULTS are 10 to 20 times larger than LINUX Results below =====
sh -c '/opt/jdk/bin/java -cp ./mach5-mesos-support-1.0-SNAPSHOT.jar
SleepLatency'
loop 0 delay 141 ms
loop 1 delay 201 ms
loop 2 delay 81 ms
loop 3 delay 14 ms
loop 4 delay 194 ms
loop 5 delay 149 ms
loop 6 delay 172 ms
loop 7 delay 203 ms
loop 8 delay 203 ms
loop 9 delay 204 ms
loop 10 delay 204 ms
....
====== LINUX RESULTS are as expected ======
sh -c '/opt/jdk/bin/java -cp ./mach5-mesos-support-1.0-SNAPSHOT.jar
SleepLatency'
Forked command at 6125
loop 0 delay 10 ms
loop 1 delay 11 ms
loop 2 delay 10 ms
loop 3 delay 10 ms
loop 4 delay 10 ms
loop 5 delay 10 ms
loop 6 delay 10 ms
loop 7 delay 10 ms
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