View Issue Details
| ID | Project | Category | View Status | Date Submitted | Last Update |
|---|---|---|---|---|---|
| 0003689 | GNUnet | ATS service | public | 2015-02-24 10:17 | 2018-06-07 00:25 |
| Reporter | Matthias Wachs | Assigned To | Christian Grothoff | ||
| Priority | high | Severity | major | Reproducibility | always |
| Status | closed | Resolution | fixed | ||
| Product Version | Git master | ||||
| Target Version | 0.11.0pre66 | Fixed in Version | 0.11.0pre66 | ||
| Summary | 0003689: ATS running with 100% CPU load | ||||
| Description | ATS is running with 100% CPU load. Issue is repeated preference aging: (gdb) bt #0 GNUNET_CONTAINER_multipeermap_get_multiple (map=0x42ad340, key=key@entry=0x7fff0f9c45f0, it=it@entry=0x405bc0 <sum_relative_preferences>, it_cls=it_cls@entry=0x7fff0f9c4570) at container_multipeermap.c:764 #1 0x0000000000405de6 in update_relative_values_for_peer (id=id@entry=0x7fff0f9c45f0, kind=kind@entry=GNUNET_ATS_PREFERENCE_LATENCY) at gnunet-service-ats_preferences.c:235 #2 0x0000000000406449 in age_values (cls=cls@entry=0x7fff0f9c4650, peer=peer@entry=0x7fff0f9c45f0, value=0x42cf9d0) at gnunet-service-ats_preferences.c:367 #3 0x00007f64c0a9f611 in GNUNET_CONTAINER_multipeermap_iterate (map=0x42cf920, it=it@entry=0x406310 <age_values>, it_cls=it_cls@entry=0x7fff0f9c4650) at container_multipeermap.c:361 #4 0x0000000000405c51 in preference_aging (cls=<optimized out>, tc=<optimized out>) at gnunet-service-ats_preferences.c:402 #5 0x00007f64c0abf106 in run_ready (ws=<optimized out>, rs=<optimized out>) at scheduler.c:587 #6 GNUNET_SCHEDULER_run (task=0x4573a50, task_cls=0x3) at scheduler.c:816 #7 0x00007f64c0ac9345 in GNUNET_SERVICE_run (argc=3, argv=0x7fff0f9c47e0, service_name=0x407e84 "ats", options=GNUNET_SERVICE_OPTION_NONE, task=0x401f40 <run>, task_cls=0x1f3f720) at service.c:1503 #8 0x0000000000401e29 in main (argc=<optimized out>, argv=<optimized out>) at gnunet-service-ats.c:241 According to the code there is only one single aging task which for the whole system. Checked to code, scheduling seems OK on first sight... | ||||
| Additional Information | Yeah ... the aging task never returns from iterating over the peers | ||||
| Tags | No tags attached. | ||||
| related to | 0003690 | closed | Christian Grothoff | Assertion failed at gnunet-service-transport_ats.c:306. NULL == ai |
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Same on gnunet9 |
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In SVN 35303: Added solver lock/unlock around aging operation. Also added extra check on aging_task not being scheduled already before adding it. Was the CPU at 100% all the time, or going down to "low" for 10s in the meantime? |
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Ok, did some debugging, it seems a single run (!) of preference_aging takes over the CPU for a long time. Disabling solver should obviously help, but this is still crazy. |
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The 'client' member of 'struct PreferenceClient' was never initialized, causing 'GAS_preference_client_disconnect' to never clean up the entries, causing the DLL to grow VERY large over time. Fixed in SVN 35305. |
| Date Modified | Username | Field | Change |
|---|---|---|---|
| 2015-02-24 10:17 | Matthias Wachs | New Issue | |
| 2015-02-24 10:17 | Matthias Wachs | Status | new => assigned |
| 2015-02-24 10:17 | Matthias Wachs | Assigned To | => Matthias Wachs |
| 2015-02-24 10:30 | Matthias Wachs | Additional Information Updated | |
| 2015-02-24 10:30 | Matthias Wachs | Note Added: 0008926 | |
| 2015-02-28 14:07 | Christian Grothoff | Relationship added | related to 0003690 |
| 2015-02-28 14:25 | Christian Grothoff | Note Added: 0008930 | |
| 2015-02-28 14:25 | Christian Grothoff | Status | assigned => feedback |
| 2015-02-28 14:27 | Christian Grothoff | Note Edited: 0008930 | |
| 2015-02-28 14:49 | Christian Grothoff | Note Added: 0008935 | |
| 2015-02-28 14:53 | Christian Grothoff | Note Added: 0008936 | |
| 2015-02-28 14:53 | Christian Grothoff | Assigned To | Matthias Wachs => Christian Grothoff |
| 2015-02-28 14:53 | Christian Grothoff | Status | feedback => assigned |
| 2015-02-28 14:53 | Christian Grothoff | Status | assigned => resolved |
| 2015-02-28 14:53 | Christian Grothoff | Fixed in Version | => 0.11.0pre66 |
| 2015-02-28 14:53 | Christian Grothoff | Resolution | open => fixed |
| 2015-02-28 14:53 | Christian Grothoff | Target Version | => 0.11.0pre66 |
| 2018-06-07 00:25 | Christian Grothoff | Status | resolved => closed |
