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HPS-SOFTWARE  March 2013

HPS-SOFTWARE March 2013

Subject:

Re: Speed of event loop

From:

"Hansson Adrian, Per Ola" <[log in to unmask]>

Reply-To:

Software for the Heavy Photon Search Experiment <[log in to unmask]>

Date:

Thu, 14 Mar 2013 19:33:08 -0700

Content-Type:

multipart/mixed

Parts/Attachments:

Parts/Attachments

text/plain (52 lines) , winmail.dat (52 lines)

Ok, thanks for checking.

I was surprised because typically I always was happy with the processing speed.

/Pelle

On Mar 14, 2013, at 7:29 PM, Sho Uemura wrote:

> I see the same thing, but the speed is about the same even if 
> EventMarkerDriver is the only driver being run. So I guess it's just 
> taking time to read from the file - profiler says 
> CountedInputStream.read() is the vast majority of the CPU time.
> 
> There is definitely a problem, though - the 1.5 release and the February 
> 14 1.6 snapshot (what you can download on 
> http://lcsim.org/maven2/org/lcsim/hps-java/1.6-SNAPSHOT/) of hps-java run 
> steering/monitoring/DummyMonitoring.lcsim in 3 seconds, and the current 
> cvs version runs in 21 seconds. Similar result running on random other 
> LCIO files with smaller events.
> 
> So something happened in the last month. I've filed a bug on Jira.
> 
> On Wed, 13 Mar 2013, Hansson Adrian, Per Ola wrote:
> 
>> Hey,
>> 
>> I'm running on a file which is filtered for two reconstructed tracks (latest snapshot):
>> 
>> http://www.slac.stanford.edu/~phansson/files/temp/hps_001353.evio.1_twotrkfilt.slcio
>> 
>> When I run the steering/LCIOEventFilter.lcsim over this file on my mac laptop I see a very slow event processing rate ~100Hz. All this is doing is checking for the existence of the track collection, and if its there cut on the nr of tracks and write the event.  I checked and it doesn't matter if I write the event or not, still very slow.
>> 
>> What speed do you see for this kind of operation? Any ideas why it's so slow?
>> 
>> /pelle
>> 
>> 
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