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ROOT 1999 - The Core Developers
ROOT 1999 - The Core Developers
ROOT 2013 - The Next Generation
ROOT 2013 - The Next Generation
ROOT - In Numbers of Users
ROOT - In Numbers of Users
ROOT - In Lines of Code
ROOT - In Lines of Code
ROOT - In Plots
ROOT - In Plots
ROOT - In Plots
ROOT - In Plots
ROOT - In Plots
ROOT - In Plots
ROOT - In Plots
ROOT - In Plots
ROOT - In Plots
ROOT - In Plots
ROOT - In Plots
ROOT - In Plots
ROOT - In Plots
ROOT - In Plots
Parallel Merging
Parallel Merging
Parallel Merging
Parallel Merging
ROOT I/O in JavaScript
ROOT I/O in JavaScript
Improvements in Histogram Classes
Improvements in Histogram Classes
New RooStats Features
New RooStats Features
Example: Higgs Combination
Example: Higgs Combination
Example: Higgs Combination
Example: Higgs Combination
New MacOS X Native Graphics Backend
New MacOS X Native Graphics Backend
Transparency
Transparency
TH2Poly
TH2Poly
TH2Poly
TH2Poly
“Refreshed” Default Graphics Style
“Refreshed” Default Graphics Style
“Refreshed” Default Graphics Style
“Refreshed” Default Graphics Style
New LaTeX Engine - TMathText
New LaTeX Engine - TMathText
New LaTeX Engine - TMathText
New LaTeX Engine - TMathText
Parallel Geometry Navigation
Parallel Geometry Navigation
Eve Event Display
Eve Event Display
Eve Event Display
Eve Event Display
RootBrowser on the iPad
RootBrowser on the iPad
One More Thing
One More Thing
One More Thing
One More Thing
One More Thing
One More Thing
One More Thing
One More Thing
One More Thing
One More Thing
One More Thing
One More Thing
One More Thing
One More Thing
One More Thing
One More Thing
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ROOT State of the Union

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1ROOT State of the Union. Fons 19version of Minuit) Investigate
Rademakers. 8th ROOT Users Workshop Saas parallelization techniques (PROOF,
Fee, 11-14 March 2013. 1. Multi-threads or porting on GPU). 19.
2ROOT - The Beginning. Jan 95: 20Example: Higgs Combination. Higgs
Thinking/writing/rewriting/more thinking combination results of ATLAS and CMS Make
Nov 95: Public seminar, presentation of combined model with several channels and
ROOT 0.5 Spring 96: decision to use CINT more than 200 parameters RooStats used
Jan 97: ROOT version 1.0 Jan 98: ROOT successfully for producing results: Could
version 2.0 Mar 99: ROOT version 2.21/08 use different statistical methods for
(1st ROOT workshop FNAL) Feb 00: ROOT comparison Required a lot of CPU for
version 2.23/12 (2nd ROOT workshop CERN) fitting each pseudo-experiment Use Grid
Sep 00: ROOT version 2.25/03 Dec 00: ROOT for submitting all jobs On-going work on
version 3.00/01 Jun 01: 3rd ROOT Users improving fitting performances. 20.
Workshop at FNAL ... 2005: ROOT finally 21New PROOF Features. Increasing number
becoming mainstream at CERN ... Mar 13: of sites and users deploying PROOF
8th ROOT Users Workshop Saas-Fee. 2. Deployment on ad-hoc PROOF clusters is
3ROOT 1999 - The Core Developers. 3. made easy by PoD
4ROOT 2013 - The Next Generation. 4. http://indico.cern.ch/contributionDisplay.
5ROOT - In Numbers of Users. Ever y?contribId=43&confId=217511 The
increasing number of users 6800 forum Virtual Analysis Facility - PROOF cluster
members, 68750 posts, 1300 on mailing list on a cloud
Used by basically all HEP experiments and http://indico.cern.ch/contributionDisplay.
beyond. 5. y?contribId=9&confId=217511 An
6ROOT - In Lines of Code. Compilation extensive PROOF bench suite has been
time on state of the art MacBookPro 2013: developed allowing to test many aspects of
4’20” (make -j 8) 2007: 20’12” (make -j PROOF related parameters (network, disk,
2). As per statsvn metrics. Real MLOCs: cpu, etc.) Many stability improvements.
2.75, was 3 with CINT. 6. 21.
7As of today 177 PB of LHC data stored 22PROOF Developments. Improvement of the
in ROOT format. ROOT - In Numbers of Bytes connection layer and of the work
Stored. ALICE: 30PB, ATLAS: 55PB, CMS: distribution engine (packetizer) Result
85PB, LHCb: 7PB. 7. merging optimization (see also parallel
8ROOT - In Plots. 8. tree merging in I/O) Improvement of memory
9New Developments - New Interpreter. management (in merging of results, in
Replacing CINT by new cling: correctness, sharing common data) Support for dynamic
full C++ Cling based on LLVM and clang addition of workers Towards a
compiler libraries “New” open source fully-functional multi-master setup
compiler suite, default on OSX and FreeBSD Dataset management across clusters Dynamic
Compiler-grade C++ on its way to C++11 load-balancing across sub-masters Dynamic
Best diagnostics on the market: 9. re-organization of a set of workers in
10Cling. Cling released in July 2011 multi-tier structures to scale up to
Fully functional C and C++ interpreter O(1000) cores Needed for extreme platforms
Just-in-Time compilation, i.e. always like IBM’s BG/Q. 22.
ACLiC Still a few issues to solve, e.g. 23New MacOS X Native Graphics Backend.
reloading of code Support multiple Uses native OSX Cocoa and Quartz for
interpreter objects (c.f. multi-threaded graphics Supports easily new features like
context) Integration with ROOT close to be transparency, gradients and shadows. 23.
finished Interfaces via TCling and TClass 24Transparency. In parallel to OSX Cocoa
Precompiled headers as dictionary, no huge and Quartz, transparency is also supported
source files See the ROOT 6 presentation in PDF and TImage outputs. This provides
https://indico.cern.ch/contributionDisplay new possibilities to visualize large data
py?contribId=6&confId=217511. 10. set. As shown on this parallel coordinates
11Improvements in I/O. Parallel Tree plots. These two plots are the same. On
merging (see next slides) Asynchronous top without transparency: useless. Bottom
prefetching When enabled, a separate with transparency: all the clusters
thread will fetch the TTreeCache blocks clearly appear. 24.
that are likely to be needed next and the 25TH2Poly. TH2Poly is a 2D Histogram
main thread continues the normal data class, inheriting from TH2, allowing to
processing Automatic support for more than define polygonal bins of arbitrary shape.
one TTreeCache per file 25.
TTree::SetCacheSize(Long64_t) no longer 26“Refreshed” Default Graphics Style.
overrides nor deletes the existing cache. The new style “Modern” is a synthesis of
Each cache is completely independent different custom styles used by several
Support for HDFS, Amazon S3, CloudFront major experiments. 26.
and Google Storage Support for LZMA 27New LaTeX Engine - TMathText. 27.
compression. 11. 28Parallel Geometry Navigation. Enabled
12Parallel Merging. Existing solution: via: gGeoManager->SetMaxThreads(N) Fast
Processing and storing the partial output thread ID retrieval implemented via TLS
on each local node and then only at the Each thread works with its own navigator
end of the process, upload to the server Navigators holding all state-dependent
and only when all slaves are done, read data No locks, no race conditions Stateful
all files on the server and write to a data structures migrated to thread data
single output file. 12. arrays Small overhead by replacing direct
13Parallel Merging. New TFile access Additional calls to
implementations: TMemFile: a completely TGeoManager::ThreadId() Partially
in-memory version of TFile. compensated by percolating stateful data
TParallelMergingFile: a TMemFile that on a in the calling sequence of some internal
call to Write will upload its content and methods Excellent scalability See the
reset the TTree objects. New solution: presentation on Thursday @ 2:20 pm
Increase parallelism by having the slaves http://indico.cern.ch/contributionDisplay.
start uploading the TTree clusters y?contribId=12&confId=217511. 28.
directly to the server which immediately 29Eve Event Display. 29.
starts saving them in the final output 30Enhancing Concurrency. Concurrent
file. 13. tasks TTask+TThread and TTaskManager
14On-going I/O Development. Continuous Concurrency in I/O Read-ahead thread
review of I/O performance in close Parallel merger Threaded zipping and
collaboration with experiment experts unzipping of buffers Concurrency and
Reimplementation of OptimizeBaskets vectorization in math Introduction of the
Explore changing the on-file byte format Vc matrix library Concurrent geometry
to little endian Extension of the parallel navigation Thread safe cling Multiple
merger Improvement of thread safety I/O concurrent cling instances. 30.
Customization: Nested Objects. 14. 31Tablets and Smart Phones. Currently
15Parallelism for I/O. 3 approaches: over 500 million iOS devices, of which 90
Parallel Merge via external process millions iPads All of ROOT ported to iOS
Support for one TFile per thread Currently (little endian, 32-bit, ARM) To cross
requires meta data (TClass, TStreamerInfo) compile on OSX to iOS native version:
to be fully build before starting parallel ./configure ios To compile on OSX to iOS
operation. Planning to lifting this simulator version: ./configure iossim
restriction in ROOT 6 (requires cling). Android will come later. 31.
Internal use of spare cores Ability to 32Implementing ROOT Graphics on iOS.
read multiple TBranch data in parallel Top Ported ROOT’s non-GUI graphics on iOS
level branches can be uncompressed and TVirtualPad interface in ROOT::iOS::Pad
un-streamed independently. Prefetching of using Quartz 2D library Writing ROOT-based
remote file content as a separate thread. native applications for iOS Demo of ROOT’s
Threaded zipping and unzipping of buffers. graphics Browser for ROOT files Future
15. developments Components to support users
16ROOT I/O in JavaScript. Provide ROOT who want to develop for iOS Port ROOT’s
file access entirely locally in a browser OpenGL code to GL/ES Use HCP (head coupled
ROOT files are self describing, the “proof perspective) technology for event display
of the pudding...” See the presentation (Eve) Uses front facing camera Glasses
tomorrow morning free 3D display. 32.
http://indico.cern.ch/contributionDisplay. 33RootBrowser on the iPad. 33.
y?contribId=5&confId=217511. 16. 34Infrastructure. Build using
17Improvements in Histogram Classes. New “./configure;make” and now also cmake
class for binning multi-dimensional data Subversion (and who knows, git in the
using a kd tree (TKDTreeBinning) Automatic future) Static code analyzer Coverity
binning of data every bin will have same (commercial) New continuous build system
entries or same weight (content) Efficient Electric Commander (commercial)
multi-dimensional histogram Can be used to Incremental and full builds and nightly
compare MC and data (make bins with MC and build snapshots for 14
compare with the data) Could be used for platforms/configurations New source code
non-parametric density estimation using convention checker Eclair (commercial, but
kernels. Also new THn class uses LLVM inside) New documentation system
Multidimensional histograms with equal From MS Word to Docbook Drupal based
bins For non-sparse multi-dimensional website. 34.
data. 17. 35ROOT Roadmap. Current version is
18RooFit/RooStats. Framework for v5-34-05 It is an LTS (Long Term Support)
statistical calculations Standard tool for version New features will be back ported
producing physics results at LHC Parameter from the trunk Version v6-00-00 is
estimation (fitting) Interval estimation scheduled for when it is ready It will be
(e.g limit results for new particle Cling based It will not contain anymore
searches) Discovery significance CINT/Reflex/Cintex GenReflex will come in
(quantifying excess of events) Implement 6-02 It might not have Windows support (if
several statistical methods (Bayesian, not, likely in 6-02) Several “Technology
Frequentist, Asymptotic) New tools for Previews” will be made availble Can be
model creation and combinations used to start porting v5-34 to v6-00. 35.
Histfactory: make RooFit models 36Enjoy The Workshop. Conclusions. Users
(RooWorkspace) from input histograms See and experiments want an absolutely stable
the presentations on Thursday RooFit @ ROOT so their carefully tuned analysis are
11:50: not disturbed when moving to a new version
http://indico.cern.ch/contributionDisplay. At the same time we need to extend to new
y?contribId=19&confId=217511 RooStats platforms and incorporate new technologies
@ 12:10: to make life easier for the users and to
http://indico.cern.ch/contributionDisplay. keep ROOT on the bleeding edge A careful
y?contribId=23&confId=217511. 18. balancing act, but a very exciting one.
19New RooStats Features. Classes for 36.
computing exclusion limits and discovery 37One More Thing. The CERN iPhone App.
significance using the procedure endorsed 37.
and agreed by ATLAS and CMS (CLs method 38CERN iPhone App. Developed by members
for limits) Using both pseudo-experiments of the ROOT team Application now in public
or asymptotic formulae Compute observed beta People interested in trying it out on
limits, expected limits and bands. Can be their iPhone Send us mail at
very time consuming, many cern-app@cern.ch for instructions Of
pseudo-experiment need to be generated and course open source: svn co
fitted Working on improving http://root.cern.ch/svn/cern-app/trunk
performancesMore efficient fitting for cern-app Need xcode and iOS dev license.
multi-parameter problems (improve the new 38.
ROOT State of the Union.ppt
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ROOT State of the Union

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