[gmx-users] How do I get to know the meaning of the first column in log file?

[Theodore Si]

                Core t (s)   Wall t (s)        (%)
        Time:     2345.800       49.744     4715.7
                  (ns/day)    (hour/ns)
Performance:       69.479        0.345


What does 0.345 hour/ns stand for? and the Wall time 49.77s?


于 2014/7/28 14:53, Mark Abraham 写道:
> I plan to put some more of this kind of documentation in the upcoming User
> Guide, but it isn't done yet.
>
> Number of times that section was entered, the total wall time spent in that
> section, and the total number of processor gigacycles spent in that
> section, and percentage of same. Some columns are useful for only some
> kinds of comparisons.
>
> Mark
>
>
> On Mon, Jul 28, 2014 at 5:35 AM, Theodore Si <sjyzhxw at gmail.com> wrote:
>
>> Thanks a lot!
>> But I am still confused about other things.
>> For instance, what do count, wall t(s) G-Cycles mean? It seems that the
>> last column is the percentage of G-Cycles.
>> I really hope there is a place where I can find all relative information
>> of the log file.
>>
>> 于 2014/7/28 11:12, Mark Abraham 写道:
>>
>>   On Jul 28, 2014 4:53 AM, "Theodore Si" <sjyzhxw at gmail.com> wrote:
>>>> For example, in the following form, what does Wait + Comm. F mean? Is
>>>> there a webpage that explains the forms in log file?
>>>>
>>> Unfortunately not (yet), but they correspond in a more-or-less clear way
>>> to
>>> the segments in manual figure 3.16. In this case, to the three boxes below
>>> "Evaluate potential/forces." Significant time spent here would indicate
>>> poor balance of compute load.
>>>
>>> Mark
>>>
>>>   R E A L C Y C L E A N D T I M E A C C O U N T I N G
>>>> Computing: Nodes Th. Count Wall t (s) G-Cycles %
>>>>
>>>>   ------------------------------------------------------------
>>> -----------------
>>>
>>>> Domain decomp. 24 2 801 2.827 351.962 5.7
>>>> DD comm. load 24 2 800 0.077 9.604 0.2
>>>> DD comm. bounds 24 2 800 0.354 44.014 0.7
>>>> Neighbor search 24 2 801 1.077 134.117 2.2
>>>> Launch GPU ops. 24 2 40002 1.518 189.021 3.1
>>>> Comm. coord. 24 2 19200 2.009 250.121 4.0
>>>> Force 24 2 20001 8.478 1055.405 17.0
>>>> Wait + Comm. F 24 2 20001 1.967 244.901 4.0
>>>> PME mesh 24 2 20001 24.064 2995.784 48.4
>>>> Wait GPU nonlocal 24 2 20001 0.170 21.212 0.3
>>>> Wait GPU local 24 2 20001 0.072 8.935 0.1
>>>> NB X/F buffer ops. 24 2 78402 0.627 78.050 1.3
>>>> Write traj. 24 2 2 0.037 4.569 0.1
>>>> Update 24 2 20001 0.497 61.874 1.0
>>>> Constraints 24 2 20001 4.198 522.645 8.4
>>>> Comm. energies 24 2 801 0.293 36.500 0.6
>>>> Rest 24 1.478 184.033 3.0
>>>>
>>>>   ------------------------------------------------------------
>>> -----------------
>>>
>>>> Total 24 49.744 6192.746 100.0
>>>>
>>>>   ------------------------------------------------------------
>>> -----------------
>>> ------------------------------------------------------------
>>> -----------------
>>>
>>>> PME redist. X/F 24 2 40002 6.199 771.670 12.5
>>>> PME spread/gather 24 2 40002 7.194 895.557 14.5
>>>> PME 3D-FFT 24 2 40002 2.727 339.480 5.5
>>>> PME 3D-FFT Comm. 24 2 80004 7.460 928.742 15.0
>>>> PME solve 24 2 20001 0.434 53.968 0.9
>>>>
>>>>   ------------------------------------------------------------
>>> -----------------
>>>
>>>> --
>>>> Gromacs Users mailing list
>>>>
>>>> * Please search the archive at
>>>>
>>> http://www.gromacs.org/Support/Mailing_Lists/GMX-Users_List before
>>> posting!
>>>
>>>> * Can't post? Read http://www.gromacs.org/Support/Mailing_Lists
>>>>
>>>> * For (un)subscribe requests visit
>>>> https://maillist.sys.kth.se/mailman/listinfo/gromacs.org_gmx-users or
>>>>
>>> send a mail to gmx-users-request at gromacs.org.
>>>
>> --
>> Gromacs Users mailing list
>>
>> * Please search the archive at http://www.gromacs.org/
>> Support/Mailing_Lists/GMX-Users_List before posting!
>>
>> * Can't post? Read http://www.gromacs.org/Support/Mailing_Lists
>>
>> * For (un)subscribe requests visit
>> https://maillist.sys.kth.se/mailman/listinfo/gromacs.org_gmx-users or
>> send a mail to gmx-users-request at gromacs.org.
>>