[Swift-devel] Re: Question of wrapper.sh

[Ioan Raicu]

I am a little bit behind here on the emails... based on the Falkon logs, 
it seems that the low throughput we are getting in the latest Swift runs 
is due to throttling.  Where are all the various throttling parameters 
that we should change, to ensure that Swift submits to Falkon as fast as 
possible with all available jobs?  I assume there is a jobs/sec 
throttle, a maximum number of outstanding jobs (i.e. falkon queued jobs 
+ running jobs), and maybe others.
Thanks,
Ioan

Zhao Zhang wrote:
> well, the tar ball I sent in the last email is from 256 cores, are 
> they from the same cpu? By the way, I tried to find the .log files, 
> but there isn't any in the folder where I started the swift script.
>
> zhao
>
> Ioan Raicu wrote:
>> Ben,
>> Those logs are only for 1 CPU, so most things will take less than 1 
>> sec.  In the case where we use 100s of CPUs (a basic scenario for the 
>> BG/P), things will take 10s of seconds, so 1 sec resolution should be 
>> OK.  Zhao, did you re-run that test with 256 CPUs?  Ben should be 
>> looking at those logs, not the 1 CPU case.
>>
>> Ioan
>>
>> Ben Clifford wrote:
>>> Whichever version of date that you used, it doesn't support more 
>>> than 1s accuracy in its output. That's irksome because its that 
>>> subsecond accuracy that I wanted from these log files.
>>>
>>> date on os x doesn't have that precision, fairly recent (in the past 
>>> couple of years at least) GNU coreutils date does. It would be nice 
>>> if you could find if that is installed and use that instead...
>>>   
>>
>

-- 
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Ioan Raicu
Ph.D. Candidate
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Distributed Systems Laboratory
Computer Science Department
University of Chicago
1100 E. 58th Street, Ryerson Hall
Chicago, IL 60637
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Email: iraicu at cs.uchicago.edu
Web:   http://www.cs.uchicago.edu/~iraicu
http://dev.globus.org/wiki/Incubator/Falkon
http://dsl-wiki.cs.uchicago.edu/index.php/Main_Page
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