Hi, Rinaldo. I test your problem in my local Mesos (run in my mac). It looks normal in my side. I started it by
``` mesos-execute --master="localhost:5050" --name="test-sleep" --command="cd /tmp && java SleepLatency" ``` ``` Registered executor on localhost Starting task test-sleep sh -c 'cd /tmp && java SleepLatency' Forked command at 42480 loop 0 delay 11 ms loop 1 delay 12 ms loop 2 delay 11 ms loop 3 delay 13 ms loop 4 delay 12 ms loop 5 delay 12 ms loop 6 delay 12 ms loop 7 delay 12 ms loop 8 delay 12 ms loop 9 delay 11 ms loop 10 delay 12 ms loop 11 delay 13 ms loop 12 delay 11 ms loop 13 delay 11 ms loop 14 delay 12 ms loop 15 delay 12 ms loop 16 delay 13 ms loop 17 delay 12 ms loop 18 delay 11 ms loop 19 delay 12 ms loop 20 delay 12 ms loop 21 delay 11 ms loop 22 delay 12 ms loop 23 delay 11 ms loop 24 delay 12 ms loop 25 delay 12 ms loop 26 delay 12 ms loop 27 delay 12 ms loop 28 delay 13 ms loop 29 delay 12 ms loop 30 delay 12 ms loop 31 delay 11 ms loop 32 delay 11 ms loop 33 delay 11 ms loop 34 delay 13 ms loop 35 delay 10 ms loop 36 delay 12 ms loop 37 delay 11 ms loop 38 delay 12 ms loop 39 delay 12 ms loop 40 delay 12 ms loop 41 delay 12 ms loop 42 delay 12 ms loop 43 delay 11 ms loop 44 delay 12 ms loop 45 delay 12 ms loop 46 delay 12 ms loop 47 delay 12 ms loop 48 delay 12 ms loop 49 delay 12 ms loop 50 delay 12 ms loop 51 delay 12 ms loop 52 delay 12 ms loop 53 delay 13 ms loop 54 delay 11 ms loop 55 delay 12 ms loop 56 delay 12 ms loop 57 delay 12 ms loop 58 delay 12 ms loop 59 delay 11 ms loop 60 delay 11 ms loop 61 delay 11 ms loop 62 delay 11 ms loop 63 delay 12 ms loop 64 delay 12 ms loop 65 delay 12 ms loop 66 delay 12 ms loop 67 delay 12 ms loop 68 delay 11 ms loop 69 delay 13 ms loop 70 delay 12 ms loop 71 delay 10 ms loop 72 delay 12 ms loop 73 delay 10 ms loop 74 delay 11 ms loop 75 delay 12 ms loop 76 delay 10 ms loop 77 delay 11 ms loop 78 delay 12 ms loop 79 delay 10 ms loop 80 delay 12 ms loop 81 delay 12 ms loop 82 delay 11 ms loop 83 delay 11 ms loop 84 delay 12 ms loop 85 delay 11 ms loop 86 delay 12 ms loop 87 delay 12 ms loop 88 delay 12 ms loop 89 delay 11 ms loop 90 delay 12 ms loop 91 delay 12 ms loop 92 delay 13 ms loop 93 delay 12 ms loop 94 delay 11 ms loop 95 delay 10 ms loop 96 delay 12 ms loop 97 delay 11 ms loop 98 delay 12 ms loop 99 delay 12 ms total time = 1215 ms Command exited with status 0 (pid: 42480) ``` On Sat, Jun 4, 2016 at 4:11 AM, DiGiorgio, Mr. Rinaldo S. < [email protected]> wrote: > Hi, > > 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 > loop 11 delay 204 ms > loop 12 delay 203 ms > loop 13 delay 203 ms > loop 14 delay 40 ms > loop 15 delay 206 ms > loop 16 delay 171 ms > loop 17 delay 107 ms > loop 18 delay 85 ms > loop 19 delay 204 ms > loop 20 delay 204 ms > loop 21 delay 203 ms > loop 22 delay 208 ms > loop 23 delay 200 ms > loop 24 delay 203 ms > loop 25 delay 203 ms > loop 26 delay 204 ms > loop 27 delay 204 ms > loop 28 delay 120 ms > loop 29 delay 83 ms > loop 30 delay 204 ms > loop 31 delay 203 ms > loop 32 delay 204 ms > loop 33 delay 208 ms > loop 34 delay 199 ms > loop 35 delay 204 ms > loop 36 delay 175 ms > loop 37 delay 11 ms > loop 38 delay 115 ms > loop 39 delay 205 ms > loop 40 delay 204 ms > loop 41 delay 11 ms > loop 42 delay 91 ms > loop 43 delay 202 ms > loop 44 delay 203 ms > loop 45 delay 204 ms > loop 46 delay 209 ms > loop 47 delay 112 ms > loop 48 delay 16 ms > loop 49 delay 69 ms > loop 50 delay 204 ms > loop 51 delay 18 ms > loop 52 delay 14 ms > loop 53 delay 70 ms > loop 54 delay 33 ms > loop 55 delay 184 ms > loop 56 delay 199 ms > loop 57 delay 194 ms > loop 58 delay 102 ms > loop 59 delay 102 ms > loop 60 delay 12 ms > loop 61 delay 197 ms > loop 62 delay 204 ms > loop 63 delay 204 ms > loop 64 delay 206 ms > loop 65 delay 11 ms > loop 66 delay 180 ms > loop 67 delay 202 ms > loop 68 delay 10 ms > loop 69 delay 20 ms > loop 70 delay 199 ms > loop 71 delay 179 ms > loop 72 delay 202 ms > loop 73 delay 33 ms > loop 74 delay 69 ms > loop 75 delay 14 ms > loop 76 delay 88 ms > loop 77 delay 204 ms > loop 78 delay 209 ms > loop 79 delay 198 ms > loop 80 delay 204 ms > loop 81 delay 25 ms > loop 82 delay 76 ms > loop 83 delay 102 ms > loop 84 delay 173 ms > loop 85 delay 13 ms > loop 86 delay 17 ms > loop 87 delay 14 ms > loop 88 delay 191 ms > loop 89 delay 204 ms > loop 90 delay 204 ms > loop 91 delay 102 ms > loop 92 delay 47 ms > loop 93 delay 37 ms > loop 94 delay 142 ms > loop 95 delay 202 ms > loop 96 delay 204 ms > loop 97 delay 202 ms > loop 98 delay 104 ms > loop 99 delay 80 ms > total time = 14193 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 > loop 8 delay 10 ms > loop 9 delay 10 ms > loop 10 delay 10 ms > loop 11 delay 10 ms > loop 12 delay 10 ms > loop 13 delay 10 ms > loop 14 delay 10 ms > loop 15 delay 10 ms > loop 16 delay 10 ms > loop 17 delay 10 ms > loop 18 delay 10 ms > loop 19 delay 11 ms > loop 20 delay 10 ms > loop 21 delay 10 ms > loop 22 delay 10 ms > loop 23 delay 10 ms > loop 24 delay 10 ms > loop 25 delay 11 ms > loop 26 delay 10 ms > loop 27 delay 10 ms > loop 28 delay 10 ms > loop 29 delay 10 ms > loop 30 delay 10 ms > loop 31 delay 10 ms > loop 32 delay 10 ms > loop 33 delay 10 ms > loop 34 delay 11 ms > loop 35 delay 10 ms > loop 36 delay 10 ms > loop 37 delay 11 ms > loop 38 delay 10 ms > loop 39 delay 10 ms > loop 40 delay 11 ms > loop 41 delay 10 ms > loop 42 delay 10 ms > loop 43 delay 11 ms > loop 44 delay 10 ms > loop 45 delay 10 ms > loop 46 delay 10 ms > loop 47 delay 10 ms > loop 48 delay 10 ms > loop 49 delay 10 ms > loop 50 delay 10 ms > loop 51 delay 10 ms > loop 52 delay 11 ms > loop 53 delay 10 ms > loop 54 delay 10 ms > loop 55 delay 10 ms > loop 56 delay 10 ms > loop 57 delay 10 ms > loop 58 delay 10 ms > loop 59 delay 10 ms > loop 60 delay 10 ms > loop 61 delay 10 ms > loop 62 delay 11 ms > loop 63 delay 10 ms > loop 64 delay 10 ms > loop 65 delay 11 ms > loop 66 delay 10 ms > loop 67 delay 10 ms > loop 68 delay 10 ms > loop 69 delay 10 ms > loop 70 delay 10 ms > loop 71 delay 10 ms > loop 72 delay 11 ms > loop 73 delay 10 ms > loop 74 delay 10 ms > loop 75 delay 10 ms > loop 76 delay 11 ms > loop 77 delay 10 ms > loop 78 delay 10 ms > loop 79 delay 10 ms > loop 80 delay 11 ms > loop 81 delay 10 ms > loop 82 delay 10 ms > loop 83 delay 10 ms > loop 84 delay 10 ms > loop 85 delay 10 ms > loop 86 delay 10 ms > loop 87 delay 10 ms > loop 88 delay 10 ms > loop 89 delay 10 ms > loop 90 delay 10 ms > loop 91 delay 10 ms > loop 92 delay 10 ms > loop 93 delay 10 ms > loop 94 delay 10 ms > loop 95 delay 10 ms > loop 96 delay 10 ms > loop 97 delay 10 ms > loop 98 delay 10 ms > loop 99 delay 10 ms > total time = 1035 ms > > > > -- Best Regards, Haosdent Huang
