Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
Advanced Modular Software Performance Monitoring
Search
Sasha Mazurov
May 30, 2012
Technology
1
240
Advanced Modular Software Performance Monitoring
CPU profiling with Intel® VTune™ Amplifier XE
Sasha Mazurov
May 30, 2012
Tweet
Share
More Decks by Sasha Mazurov
See All by Sasha Mazurov
L1Calo Offline Software Status
mazurov
0
72
Performance and Regression tests for Simulation
mazurov
0
71
About v2
mazurov
0
65
L1Calo Offline Software Status
mazurov
0
96
L1Calo Offline Software Status
mazurov
0
98
LHCbPR V2
mazurov
0
130
Paper approval
mazurov
0
58
Conventions' Publications
mazurov
0
58
Ph.D final exam
mazurov
0
100
Other Decks in Technology
See All in Technology
敢えて生成AIを使わないマネジメント業務
kzkmaeda
2
500
20250707-AI活用の個人差を埋めるチームづくり
shnjtk
6
4.1k
Operating Operator
shhnjk
1
640
Amplify Gen2から知るAWS CDK Toolkit Libraryの使い方/How to use the AWS CDK Toolkit Library as known from Amplify Gen2
fossamagna
0
150
freeeのアクセシビリティの現在地 / freee's Current Position on Accessibility
ymrl
2
260
Enhancing SaaS Product Reliability and Release Velocity through Optimized Testing Approach
ropqa
1
250
Rethinking Incident Response: Context-Aware AI in Practice
rrreeeyyy
1
230
Copilot coding agentにベットしたいCTOが開発組織で取り組んだこと / GitHub Copilot coding agent in Team
tnir
0
120
助けて! XからWaylandに移行しないと新しいGNOMEが使えなくなっちゃう 2025-07-12
nobutomurata
2
130
american aa airlines®️ USA Contact Numbers: Complete 2025 Support Guide
aaguide
0
470
第4回Snowflake 金融ユーザー会 Snowflake summit recap
tamaoki
1
330
CDK Toolkit Libraryにおけるテストの考え方
smt7174
1
360
Featured
See All Featured
JavaScript: Past, Present, and Future - NDC Porto 2020
reverentgeek
50
5.5k
Statistics for Hackers
jakevdp
799
220k
Creating an realtime collaboration tool: Agile Flush - .NET Oxford
marcduiker
30
2.1k
Producing Creativity
orderedlist
PRO
346
40k
What's in a price? How to price your products and services
michaelherold
246
12k
Code Reviewing Like a Champion
maltzj
524
40k
Facilitating Awesome Meetings
lara
54
6.5k
GraphQLとの向き合い方2022年版
quramy
49
14k
Docker and Python
trallard
44
3.5k
[Rails World 2023 - Day 1 Closing Keynote] - The Magic of Rails
eileencodes
35
2.4k
VelocityConf: Rendering Performance Case Studies
addyosmani
332
24k
Chrome DevTools: State of the Union 2024 - Debugging React & Beyond
addyosmani
7
740
Transcript
Advanced Modular Software Performance Monitoring CPU profiling with Intel® VTune™
Amplifier XE Alexander Mazurov Ferrara University, CERN
2 I. Event Processing Software II. Profilers III. Intel® VTune™
Amplifier XE IV. Gaudi Framework V. Gaudi Intel Profiler Auditor VI. Profiling examples
3 Physics events The Higgs Boson Simulation * Trigger *
Analysis I. Event Processing Software
4 Detector events Events to storage 106 events/sec 4500 events/sec
LHCb High Level Trigger (HLT) Software Moore
5 II. Profilers Collect information related to how an
application or system perform.
6 Measure frequency and duration of functions calls and/or code
instructions. CPU Profiler
7 Profiling Techniques - Hardware counters - Instrumenting the code
8 Hardware counters Exploit hardware performance counters from Performance Monitoring
Unit (PMU) Counters: - Translation lookaside buffer (TLB) misses - Cache misses - Stall cycles - Memory access latency - ... Perfmon2 * Intel VTune Amplifier
9 Instrumenting the code - Statically: * Change code manually
/ automatically * Compiler assisted (gcc -pg) - Dynamically (at runtime): * Change code in runtime - Valgrind - Google Performance Tools - Intel VTune Amplifier
10 III. VTune™ Amplifier XE Performance Profiling Tool - x86
(32 and 64-bit) - GUI and CLI
11 VTune™ Features Runtime instrumenting profiler - User-mode sampling -
Hardware-based sampling - Concurrency and locks and waits analysis - Threading timeline - Attach to a running process - Source view
12 1) Interupts a process 2) Collect samples of all
active instruction addresses 3) Restore a call sequence upon each sample. How user-mode sampling works?
13 User-mode analysis types - Hotspots - Concurrency - Locks
and Waits
14 User-mode sampling Hotspots analysis:
15 Group results
16 Call Stack
17 Filter by timeline
18 CPU time by code line Debug mode (-g)
19 User-mode sampling is a statistical method and does not
provide a 100% accurate results. Accuracy depends on: - Duration of the collection - Speed of processor - Amount of software activity - Sampling interval * recommended value is 10 ms * profiling is only 5% slower Sampling Accuracy
20 Integrating VTune™ Amplifier to Event Processing Framework
21 IV. Gaudi Event processing framework Moore Trigger Gauss Simulation
Brunel Reconstruction Online Monitoring and commissioning DaVinci Physics analysis
22 Gaudi Architecture Algorithms * Services * Tools
23 Moore Event Loop Hlt1DiMuonHighMassFilterSequence Hlt1DiMuonHighMassStreamer FastVeloHlt MuonRec Velo2CandidatesDiMuonHighMass GECLooseUnit
createITLiteClusters createVeloLiteClusters Algorithms Sequence How to profile algorithms?
24 V. Gaudi Intel Profiling Auditor VTune™ User API +
Gaudi Auditors API
25 VTune™ User API - Start/Pause profiling - Mark profiling
regions
26 Gaudi Auditors API Algorithm Start event End
event Callback functions
27 Algorithms profiling (I) CPU time per sequence branch
28 Algorithms profiling (II)
29 Gaudi configuration from Configurables import IntelProfilerAuditor profiler = IntelProfilerAuditor()
profiler.StartFromEventN = 5000 profiler.StopAtEventN = 15000 AuditorSvc().Auditors += [profiler]
30 Run: $> intelprofiler -o /collected/data job.py Analyze (GUI): $>
amplxe-gui /collecter/data/r001hs Analyze (CLI): $> amplxe-cl -reports hotspots -r /collecter/data/r001hs
31 VI. Profiling examples 1. Memory allocation functions 2. Measuring
profiling accuracy 3. Custom reports
32 1. Memory allocation functions operatornew from libstdc++ library: tc_new
from tcmalloc library: tc_new uses twice less time then operatornew
33 2. Measuring profiling accuracy Intel Profiling Auditor vs .
Timing Auditor Measures the absolute time of algorithm's run 1000 events
34 3. Custom reports Build reports using CSV files exported
from VTune Amplifier
35 Conclusions Intel® VTune™ Amplifier XE: + Various analysis types
and reports + Rich User API + Reasonable overhead time