1) Message boards : News : Database Maintenance 9-4-2014 (Message 67806) Posted 8 Sep 2018 by YWinger Post: I have been having problems with the N-Body simulations for a couple of weeks; have reported it but haven't been notified of a means to resolve. In essence, a work unit picks up, works for a while and then stops progressing while holding the CPUs. Other work unit types have no issue. Example: 9/8/2018 08:28:52 AM | Milkyway@Home | Starting task de_nbody_7_23_2018_v170_20k__data_2_1533467104_166846_1 10:58:00 - Progress: 31.297% - Elapsed: 02:15:04 - Remaining: 04:56:50 -- Total CPU is at 8% and that seems to be one other project using the GPU 13:16:00 - Progress: 31.297% - Elapsed: 04:18:39 - Remaining: 09:27:56 Anyone else experiencing this? Is there a fix?

2) Message boards : News : New nbody runs July 2 (Message 67728) Posted 26 Aug 2018 by YWinger Post: I am still seeing issues with the N-Body. The work units get picked up and then they stall out while retaining the CPUs so other work units don't get processed. The following example shows a 1.25 - 1.50 hour work unit that ran for almost 12 hours and attained only 7.52% completion. Estimated remaining time went from 1.5 hours to over 8 days. 8/25/2018 7:08:02 PM | Milkyway@Home | Starting task de_nbody_7_23_2018_v170_20k__data_2_1533467104_174546_0 2018-08-26 08:23 | Running (8 CPUs) - but 5 other single-CPU jobs running, plus 1 partial with GPU. All N-Body task estimates between 01:15 and 01:30 7.52% | 11:56:08 | 6d 02:49:41 12:50 | 7.52% | 15:56:28 | 8d 04:05:40

3) Message boards : News : New nbody runs July 2 (Message 67723) Posted 23 Aug 2018 by YWinger Post: For the two I mentioned earlier, between 11:00 and 13:36 their progress stayed at 71.234% and 61.237% and so I canceled them.

4) Message boards : News : New nbody runs July 2 (Message 67722) Posted 23 Aug 2018 by YWinger Post: More info on the N-Body issue. Some are allocating 8 CPUs and only using 15%-20% of 4 CPUs. Examples: de_nbody_7_23_2018_v170_20k__data_1_1533467104_35769_0 de_nbody_7-23-2018_v170_20k__data_2_1533467104_35738_0

5) Message boards : News : New nbody runs July 2 (Message 67713) Posted 19 Aug 2018 by YWinger Post: I am experiencing problems with N-Body simulation 1.7. I am seeing almost no CPU activity although 8 CPUs are assigned. Elapsed time is accruing but remaining time is increasing as well. No progress. A 3-1/2 hour work unit has 19 hours elapsed and now shows 4-1/4 hours remaining. I suspended all N-Body 1.7 work units and Home 1.46 work units were then picked up; all CPUs now running at around 75%. Please advise.

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