Fermi LAT Gamma-ray pulsar binary search "FGRPB1" - new app versions

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Bernd Machenschalk
Bernd Machenschalk
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22 Sep 2016 13:03:02 UTC
Topic 201332
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    We recently issued a couple of new app versions for FGRPB1:

    - 1.01 is identical to the initial 1.01, but has the plan class "FGRPOLD" associated. This ensures that only "old" tasks are ran with that application

    - 1.03 incorporates a fix for the final "follow-up" computation. The run-time of this application will be slightly longer (~2%). The result is incompatible (won't "validate") with that of 1.01, so we made sure that only tasks generated after this app version was published are ran with it.

    - 1.04 fixes a problem with the Linux 64Bit build of 1.03

    - 1.05 (out now!) saves some time with a pre-calculated "lookup table". Takes ~100MB more memory, but should speed up tasks by 15-25% (depends on the host)

    BM

    Jasper
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    My first two 1.05 WUs

    23 Sep 2016 8:41:09 UTC
    Message 149999
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      My first two 1.05 WUs finished last night. It took them about an hour less, out of ten, but they are not validated yet - I´m recovering (slowly) from a single invalid 12 days ago. It seems there is also quite some savings in additional run time, but I´d need to see more over longer time, as that depends on what I´m doing myself with it when not sleeping.

      It is not as much less as announced for me, but much appreciated nevertheless. A whole hour out of 10 makes it quite significant in my book. 

      AgentB
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      Bernd Machenschalk wrote:-

      24 Sep 2016 11:32:29 UTC
      Message 150007
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        Bernd Machenschalk wrote:

        - 1.05 (out now!) saves some time with a pre-calculated "lookup table". Takes ~100MB more memory, but should speed up tasks by 15-25% (depends on the host)

        Thanks Bernd, I don't have a significant sample to make good comment yet but the first 1.05 task was about 40% slower on this host.   I have others in progress which i think may be faster (not on that host)

        FGRPB1 on host 1905468

        my partner on that task has two tasks which look about 5% slower.

        FGRPB1 on host 9891958

        And his partner a E3-1220 v3 Xeon also looks to be about 40-50 % slower.

        FGRPB1 on host 12245654

        I've tried to sort the links so that the 1.05 float to the top.

         

        AgentB
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        On this Xeon  E5-2660 host

        24 Sep 2016 12:11:57 UTC
        Message 150019
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          On this Xeon  E5-2660 host 12242223

          Application     N     Average      Median     Mininum      Maximum   StdDeviation
          FGRPB1v1.00  6427     37969.5      38040.67   16175.79     41602.40  558.528
          FGRPOLD        68     37920.9      38093      36846.11     38321.14  394.326
          FGRPSSE        14     42919.7      42947.6    42673.05     43098.47  127.486
          FGRPSSEv1.04  102     38768        38870.8    37339.38     39341.85  352.08
          FGRPSSEv1.05   34     39422.7      39427.4    39258.41     39707.46   98.146

           On this i5-4690k host 11905468.

          Application     N     Average      Median      Mininum       Maximum StdDeviation
          FGRPB1v1.00   395     10610.8     10456.41      671.54      14646.30 1059.96
          FGRPOLD        12     10464.8     10460.7     10375.99      10568.47   48.1537
          FGRPSSE        21     15897.7     16574.71     5057.27      16725.81 2487.38
          FGRPSSEv1.04    6     10847.3     10865.1     10686.62      11010.61  111.035
          FGRPSSEv1.05    5     15653.5     15622.37    15559.85      15893.64  123.521

           

          Bernd Machenschalk
          Bernd Machenschalk
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          I declared the 1.05 version

          25 Sep 2016 10:47:27 UTC
          Message 150027
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            I declared the 1.05 version as "Beta", so you can decide yourself whether to run it or not. So far I really don't know on which host it's faster or slower.

            BM

            Jasper
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            That does not seem to work

            26 Sep 2016 17:20:01 UTC
            Message 150047 in response to message 150027
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              That does not seem to work for me, as I´d prefer 1.05 of course here. The selection seems OK but preference is given to 1.03, much longer for me:

              2016-09-26 12:47:22.0980 [PID=23112]    [version] Checking plan class 'FGRPOLD'
2016-09-26 12:47:22.0980 [PID=23112]    [version] WU#256278444 too new
2016-09-26 12:47:22.0980 [PID=23112]    [version] Checking plan class 'FGRPSSE'
2016-09-26 12:47:22.0980 [PID=23112]    [version] plan class ok
2016-09-26 12:47:22.0980 [PID=23112]    [version] Checking plan class 'FGRPSSE-Beta'
2016-09-26 12:47:22.0980 [PID=23112]    [version] plan class ok
2016-09-26 12:47:22.0980 [PID=23112]    [version] Best version of app hsgamma_FGRPB1 is 1.03 ID 839 FGRPSSE (3.21 GFLOPS)

              I am running 7.6.22 on OS X. 

               
              Bernd Machenschalk
              Bernd Machenschalk
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              Sorry. Should work now.

              26 Sep 2016 18:17:53 UTC
              Message 150049
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                Sorry. Should work now.

                BM

                pustota
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                Hi! I started getting errors

                26 Sep 2016 23:13:58 UTC
                Message 150055
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                  Hi!

                  I started getting errors as a result of the calculation tasks in version 1.05

                  Also i had Boinc crash couple times with this tasks. i didn't get any errors on prev. task versions (1.01,1.03)

                  How can i fix this?  my computer is 12418567

                  Thanks.

                   

                  Gary Roberts
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                  Bernd Machenschalk wrote:I

                  27 Sep 2016 5:43:27 UTC
                  Message 150061 in response to message 150027
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                    Bernd Machenschalk wrote:

                    I declared the 1.05 version as "Beta", so you can decide yourself whether to run it or not. So far I really don't know on which host it's faster or slower.

                    If a volunteer has allowed beta apps for the purposes of using a particular GPU app, then there wont be an opportunity to use the non-beta CPU app, will there???  If a particular host is using a beta GPU app, wont it also be using the beta CPU app???

                    In my case, I have allowed beta apps but would prefer to use the non-beta version of the FGRPB1 app.  As a quick example of why, on a Haswell based machine (G3258 CPU + HD7850 GPU) running 64 bit Linux, the 1.04 app was taking around 14.5 ksecs/task whilst the 1.05 app now takes >20 ksecs.  This isn't an isolated example.  I think a lot (if not most) of my hosts are in the same boat.

                    I don't have time to do a proper analysis and I find it much harder to gather the needed information on the new website.  Without the ability to select results for a particular science run, it's just too tedious and frustrating.

                     

                    Cheers,
                    Gary.

                    Jasper
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                    I´m not sure, maybe it was

                    27 Sep 2016 6:16:31 UTC
                    Message 150062 in response to message 150049
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                      Bernd Machenschalk wrote:

                      Sorry. Should work now.

                      I´m not sure, maybe it was just my bad. I enabled Beta testing yesterday morning, saved and that was it, thinking it would take precedence over anything else. After a while, I realised this was perhaps not true: I was still running under local preferences, where Beta testing is not an option. So I activated web preference instead, yesterday evening...

                      Anyway, I got two 1.05 WUs meanwhile, around midnight. Should finish shortly. Embarassed 

                      Bernd Machenschalk
                      Bernd Machenschalk
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                      Gary Roberts wrote:Bernd

                      27 Sep 2016 8:25:05 UTC
                      Message 150065 in response to message 150061
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                        Gary Roberts wrote:

                        Bernd Machenschalk wrote:

                        I declared the 1.05 version as "Beta", so you can decide yourself whether to run it or not. So far I really don't know on which host it's faster or slower.

                        If a volunteer has allowed beta apps for the purposes of using a particular GPU app, then there wont be an opportunity to use the non-beta CPU app, will there???  If a particular host is using a beta GPU app, wont it also be using the beta CPU app???

                        Sorry. You might agree that it's pretty hard to please everyone.

                        It would help, I guess, to find out on which systems the 1.05 runs faster and on which it's slower, so I can implement an automatic selection independently of the manual "Beta" one.

                        BM

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