Message boards :
Theory Application :
Odd runtime and CPU time registered for a task
Message board moderation
Author | Message |
---|---|
Send message Joined: 28 Sep 04 Posts: 674 Credit: 43,162,254 RAC: 15,940 |
https://lhcathome.cern.ch/lhcathome/result.php?resultid=288968731 The task above run for about 90 minutes with 1 CPU core as seen by the stderr log (from 06:03:44 to 07:36:01) but Boinc has recorded that runtime is 9,963.00 seconds and CPU time 79,704.00 seconds. BoincTasks has a record for runtime 1:32:19 and CPU time 116:09:37. From message log: 234135 LHC@home 13.11.2020 6:03:43 [cpu_sched] Starting task Theory_2390-1125045-141_0 using Theory version 30006 (vbox64_theory) in slot 4 ... 234691 LHC@home 13.11.2020 7:36:03 Computation for task Theory_2390-1125045-141_0 finished Does anybody have an idea what could have happened? |
Send message Joined: 14 Jan 10 Posts: 1268 Credit: 8,421,637 RAC: 1,939 |
Does anybody have an idea what could have happened?Not really. Probably you have in your project preferences "No Limit" for # of cpus and are using an app_config.xml. Your machine has 8 threads and the number of CPU-seconds reported is about 8 times the real number. |
Send message Joined: 28 Sep 04 Posts: 674 Credit: 43,162,254 RAC: 15,940 |
Does anybody have an idea what could have happened?Not really. The project preferences for this venue is set to 3 for # of CPUs. Below is the Theory section from app_config.xml: <app> <name>Theory</name> <max_concurrent>4</max_concurrent> </app> <app_version> <app_name>Theory</app_name> <plan_class>vbox64_mt_mcore</plan_class> <avg_ncpus>1.000000</avg_ncpus> <cmdline>--nthreads 1 --memory_size_mb 750</cmdline> </app_version> All other Theory tasks for this host have normal runtime and CPU time, this was the only one like this I happened to notice. The host does about 30-35 Theory tasks a day + 2 Atlas tasks a day. App_config sets Atlas also to use only 1 CPU core. |
Send message Joined: 9 Jan 15 Posts: 151 Credit: 431,596,822 RAC: 0 |
Does anybody have an idea what could have happened?Not really. Strange cputime but notice that log report default 630MB in memory. Your app is set to 750MB, you might need to re-check config for this. If doesn't catch mem it may not use config for nthreads 1 stderr Setting Memory Size for VM. (630MB) |
Send message Joined: 28 Sep 04 Posts: 674 Credit: 43,162,254 RAC: 15,940 |
Ok, I see that the plan_class I have used in app_config.xml (vbox64_mt_mcore) is not valid anymore. All my Theory tasks are running in plan_class vbox64_theory, also the one with odd CPU time. So my app_config is omitted for that part and default values are used. Still the mystery is why only this one task has calculation time values that are so different from the other Theory tasks on this host. |
©2024 CERN