Log of /trunk/core/meta/src/TVirtualStreamerInfo.cxx
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43337 -
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Modified
Mon Mar 12 19:06:23 2012 UTC (2 years, 10 months ago) by
pcanal
File length: 8745 byte(s)
Diff to
previous 43288
Addendum to revision 43288: add one more test that the Factory has been properly created and always return the value of the static variable. This should quiet down coverity
Revision
43288 -
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Modified
Thu Mar 8 13:43:50 2012 UTC (2 years, 10 months ago) by
pcanal
File length: 8579 byte(s)
Diff to
previous 41895
Not be able to create the TVirtualStreamerInfo factory is also fatal (this fixes many coverity on not checking the return value of TVirtualStreamerInfo::Factory
Revision
40444 -
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Modified
Wed Aug 3 16:39:27 2011 UTC (3 years, 5 months ago) by
pcanal
File length: 8421 byte(s)
Diff to
previous 33175
From Matthew Strait, clarify the error message in case where the StreamerInfo plugin is not initialized properly. See Savannah #85111
Revision
33175 -
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Modified
Sat Apr 24 21:43:40 2010 UTC (4 years, 9 months ago) by
pcanal
File length: 7824 byte(s)
Diff to
previous 32159
Change the default for streaming the content of STL containers from object-wise
to member-wise.
We evaluated the impact of moving to MemberWise streaming using 5 different CMS data files
cms1.root an older split using level 99 Reco file
cms2.root a more recent non split raw data file
cms3.root a more recent non split Reco file
cms4.root is an example of the lepton plus jet analysis format known as a user PAT-tuple (split)
cms5.root is an example AOD (analysis object dataset) format file. It is not split because the objects here are a strict subset of the RECO objects.
We rewrote all the files using the v5.26/00 new basket clustering algorithm using both memberwise streaming and objectwise streaming.
In the table below the read time is the CPU time to completion including loading the libraries.
When reading the file where always in the os cache (since we are focusing evaluating cpu time).
The number of event actually read varies from file set to file set but was calibrated to result
in about 10s of cpu time. The files are read using a library generated with TFile::MakeProject.
The object-wise files are between 2% and 10% larger compared to their member-wise coutnerpart.
The CPU time for reading object-wise files is 12% higher for split files
and 30% higher for non-split files.
So the improvement is significant enough to warrant switch the default from objectwise to memberwise.
Split files:
Filename Memberwise Size Cpu Time To read
cms1.root N 17.5 Gb 10.55s ± 0.15 (2200 entries)
cms1.root Y 16.8 Gb 9.12s ± 0.08
cms4.root N 1.47 Gb 10.18s ± 0.19 (2500 entries)
cms4.root Y 1.43 Gb 9.24s ± 0.06
Non Split files:
Filename Memberwise Size
cms2.root N 1.65 Gb 10.95s ± 0.05 (1000 entries)
cms2.root Y 1.53 Gb 8.20s ± 0.05
cms3.root N 0.780 Gb 10.59s ± 0.05 (700 entries)
cms3.root Y 0.717 Gb 8.29s ± 0.08
cms5.root N 1.55 Gb 10.20s ± 0.17 (700 entries)
cms5.root Y 1.40 Gb 8.09s ± 0.08
Revision
32159 -
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Modified
Fri Jan 29 17:17:09 2010 UTC (4 years, 11 months ago) by
pcanal
File length: 7825 byte(s)
Diff to
previous 22961
Improve thread safety and performance of TStreamerInfo creation and use.
Remove a spurrious error message when in MemberWise streaming mode (see r30751 and r30527)
Insure that the StreamerInfo using in MemberWise streaming in not optimized (previously this was checked/done only for the 'current' StreamerInfo).
Reduce (dramatically) the number of times a StreamerInfo is recompiled.
Add TVirtualStreamerInfo::IsCompiled (to replace use of GetOffset()!=0)
Implementation details:
Remove internal use of TVirtualStreamerInfo::Optimize(kFALSE), replace
by explicit setting of kCannotOptimize.
Remove virtually (and make inline) 3 time critical functions.
Revision
22961 -
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Modified
Thu Apr 3 13:32:57 2008 UTC (6 years, 9 months ago) by
rdm
File length: 7711 byte(s)
Diff to
previous 22667
move the directories:
base clib cont meta metautils newdelete pcre rint thread unix utils
winnt zip
under the new core meta directory.
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