Holistic Measurement Driven System Assessment …•Real-time collection and processing for 28,000...

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Holistic Measurement Driven System Assessment (HMDSA) Exascale-ready operations, improved performance, and balanced system design via comprehensive system monitoring and analysis National Center for Supercomputing Applications and University of Illinois: Bill Kramer (PI) Greg Bauer, Brett Bode, Mike Showerman, Jeremy Enos, Aaron Saxton, Saurabh Jha, Zbigniew Kalbarczyk, Ravi Iyer Sandia National Laboratories: James Brandt, Ann Gentile Institutional Collaborators: Boston University, New Mexico State University, University of Central Florida • Data-driven and Machine Learning (ML) based mechanisms for data collection, analysis, and automated runtime feedback and control Scalable APIs that enable flexible runtime interactivity (e.g., streaming analytics) • Platform independent open-source solutions Enable highly efficient HPC system usage and inform future system improvements to produce more science Transform real-time data into actionable intelligence at runtime Lightweight, low overhead mechanisms enable high fidelity (e.g. sub-second) synchronized, whole system numeric and event data capture with negligible impact on application runtime Discovery and analysis of performance and resilience related phenomena via integrated system logs and numeric data High resolution extraction and classification of phenomena with respect to locality, severity, and temporal extent Low latency feedback of analysis results to system software, applications, and system managers Is my performance variation due to system conditions or code changes? How can I know if the system is having problems? What are the architectural requirements given the site’s workload? How can a system provide more eective and ecient services? User System Managers & Users Architects & Acquisitions Teams Architects, System Managers & Support StaCapability: Topology-aware scheduling (TAS) based on congestion measurements Dierent Cray Aries with competing application, dierent Aries, same Aries (self-contention) Insight: Identifying issues with network routing and congestion mitigation procedures Percentage of congestion time recovered by performing dynamic re-mapping. Capability: Diagnose file-system issues using periodic latency measurements of file system operations (e.g. write) Transient network issue Server degraded Significant latency Capability: Diagnose network issues using extracted congestion regions (e.g. Cray Gemini interconnect) Capability: Combined reasoning based on changes in application characteristics (e.g.,MPI message size) and system characteristics (e.g., network congestion) to diagnose cause(s) of performance variation and predict application runtime. Capability: Dynamic task re-mapping based on congestion measurements Insight: Assessing dynamic range of memory needs for facilities’ workflows Answering Key Operational Questions Capability: Diagnose code-related issues (e.g. impact of MPI message size on runtime) 0 20 40 60 256 1,024 4,096 16,384 65,536 262,144 Runtime Message Size (B) Architecture supports big data analysis, provenance, and curation. Currently in production on Blue Waters: Real-time collection and processing for 28,000 nodes and all sub-systems * Process 20 B datums per day * Active storage of 11 trillion datums 8,100 active unique log and data event types * 50,000 dierent event types seen to date * Up to 1,470M log and data events/day (30M avg) Capability: Inform design decisions for future systems Time Key Strengths Exascale-ready Features 10% 55% 35% Worst % input queue stall across directions on Cray Gemini interconnect X±,Y ±,Z± Duration of congestion 10 1 10 2 10 3 10 4 Minutes Impact of TAS on system performance 2014-08-01 2015-02-01 2015-05-01 2015-11-01 Utilization Injection (B/s) Figures of merit on Cray Aries interconnect system Total peak memory (TB)1400 0 1000 600 200 400 800 1200 Node count 0 5000 10000 15000 20000 Log10 wall hours T = t Monitoring Clustering Inference State Estimation (Diagnosis) State Prediction Zombie process Memory leak; app slow tile link down fs trac issue unroll factor, k=3 healthy Node memory leak .. .. 1 healthy N 2 State 1/Time between errors Server load Numerical features (from performance counters) Log clustering (e.g., modeling error propagation) 15,872 XE node NAMD job NIC input (GB/s) per project 0 6000 Time 0 500 1000 1500 2000 2500 0 10 20 30 40 Time (Seconds) #Run Prediction Real T = t + δ t Textual features (from raw syslogs) Feature Extraction and Training Visualization Numerical clustering (e.g., Identify performance anomalies) .. Pattern .. 2018/10/23 10:12 .. 2018/10/23 10:08 host svc pid * [num] LNET Received down event for * 1098 .. 23 956 .*LustreError:.*@@@ bulk PUT failed.* Count Last seen Ptn ID 357 Significance and Impact 0.0 0x0 0.053 CoMD 0.0 0.0 nid000[21-22] 10396 2018-09-21 00:21:25 0.61 2018-09-21 00:19:16 2.75 0.0 nid000[53,59] 2018-09-21 00:19:19 2018-09-21 00:21:28 0.042 0.06 CoMD 0.0 0x0 10397 0.59 0.1 0.0 0.0 1.55 2018-09-21 00:22:02 0.29 2018-09-21 00:19:26 nid000[60-61] 0.21 0x0 10398 0.041 lulesh Comm Perf 0.0 App Perf 0.59 PAPI Perf 0.0 Anomalies 0x1 Mem Score 0.042 NW Congest 1.57 0.0 HPages End Time 2018-09-21 00:30:40 Start Time nid000[53,59] 2018-09-21 00:28:40 CoMD App ID Node ID Job ID 10399 0% 10% 20% 30% 40% 50% Hops Bandwidth Stalls Individual data points Aggregated data points Online congestion analysis Job profile System profile Multivariate analyses of job and system Visualization Data Availability (seconds) Historical data analysis ML-based feedback and control Expert-driven Improvements Data characterization 10 0 0.001 1.0 1000 10 3 10 6 10 9 10 12 Data Size (B) Scalable System Design and Architecture Actionable Expert and ML-Driven Analysis https://hmdsa.github.com/hmdsa • ML/AI • Log and Event Analysis Actionable Intelligence Data Collection Data Collection Feedback and Control Analysis Admin Web MOTD, Log Browsing, Data Mini, Web Portal API Dashboards Analysis Research System Visualization Email, Text and Event Notifications • ML/AI • Signal Analysis • Log and Event Analysis • Event Prediction and Correlation HIGH PERFORMANCE/PROJECT DRIVEN ANALYSIS AND PREDICTION TOOLS PROCESSOR INTERCONNECT STORAGE Event Logs Blade and Cabinet Controller Sensor Data LDMS Job Application Resource and Performance Data Notification System Machine in the Loop Analysis Feedback Human in the Loop Analysis Feedback Power System Facility Systems Environmental Systems BUILDING AND FACILITIES Parser Syslog-NG Database and Active Data Repository Web Server Long Term Data Repository Z+ Y+ X+ 006 005 004 003 007 106 105 104 103 107 016 015 014 013 017 116 115 114 113 117 Sandia National Laboratories is a multimission laboratory managed and operated by National Technology & Engineering Solutions of Sandia, LLC, a wholly owned subsidiary of Honeywell International Inc., for the U.S. Department of Energy’s National Nuclear Security Administration under contract DE-NA0003525.

Transcript of Holistic Measurement Driven System Assessment …•Real-time collection and processing for 28,000...

Page 1: Holistic Measurement Driven System Assessment …•Real-time collection and processing for 28,000 nodes and all sub-systems * Process 20 B datums per day * PredictionActive storage

Holistic Measurement Driven System Assessment (HMDSA)Exascale-ready operations, improved performance, and balanced system design via comprehensive system monitoring and analysisNational Center for Supercomputing Applications and University of Illinois: Bill Kramer (PI) Greg Bauer, Brett Bode, Mike Showerman, Jeremy Enos, Aaron Saxton, Saurabh Jha, Zbigniew Kalbarczyk, Ravi IyerSandia National Laboratories: James Brandt, Ann GentileInstitutional Collaborators: Boston University, New Mexico State University, University of Central Florida

• Data-driven and Machine Learning (ML) based mechanisms for data collection, analysis, and automated runtime feedback and control

• Scalable APIs that enable flexible runtime interactivity (e.g., streaming analytics)• Platform independent open-source solutions

• Enable highly efficient HPC system usage and inform future system improvements to produce more science

• Transform real-time data into actionable intelligence at runtime

• Lightweight, low overhead mechanisms enable high fidelity (e.g. sub-second) synchronized, whole system numeric and event data capture with negligible impact on application runtime

• Discovery and analysis of performance and resilience related phenomena via integrated system logs and numeric data

• High resolution extraction and classification of phenomena with respect to locality, severity, and temporal extent

• Low latency feedback of analysis results to system software, applications, and system managers

Is my performance variation due to system conditions or code changes?

How can I know if the system is having problems?

What are the architectural requirements given the site’s workload?

How can a system provide more effective and efficient services?

User System Managers & Users Architects & Acquisitions Teams Architects, System Managers & Support Staff

Capability: Topology-aware scheduling (TAS) based on congestion measurements

Different Cray Aries with competing application, different Aries, same Aries (self-contention)

Insight: Identifying issues with network routing and congestion mitigation procedures

Percentage of congestion time recovered by performing dynamic re-mapping.

Capability: Diagnose file-system issues using periodic latency measurements of file system operations (e.g. write)

Transient network issue

Server degraded

Significant latency⇤<latexit sha1_base64="+Rzta32q7ZzBpV3C+tL0S74zD9I=">AAAB6nicdVBNS8NAEJ3Ur1q/qh69LBZBPJSkhrbeil48VrQf0Iay2W7apZtN2N0IJfQnePGgiFd/kTf/jZu2goo+GHi8N8PMPD/mTGnb/rByK6tr6xv5zcLW9s7uXnH/oK2iRBLaIhGPZNfHinImaEszzWk3lhSHPqcdf3KV+Z17KhWLxJ2extQL8UiwgBGsjXSbns0GxZJdvqhXK24V2WXbrjkVJyOVmnvuIscoGUqwRHNQfO8PI5KEVGjCsVI9x461l2KpGeF0VugnisaYTPCI9gwVOKTKS+enztCJUYYoiKQpodFc/T6R4lCpaeibzhDrsfrtZeJfXi/RQd1LmYgTTQVZLAoSjnSEsr/RkElKNJ8agolk5lZExlhiok06BRPC16fof9KulB3Db9xS43IZRx6O4BhOwYEaNOAamtACAiN4gCd4trj1aL1Yr4vWnLWcOYQfsN4+AZL6jfw=</latexit><latexit 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Capability: Diagnose network issues using extracted congestion regions (e.g. Cray Gemini interconnect)

Capability: Combined reasoning based on changes in application characteristics (e.g.,MPI message size) and system characteristics (e.g., network congestion) to diagnose cause(s) of performance variation and predict application runtime.

Capability: Dynamic task re-mapping based on congestion measurementsInsight: Assessing dynamic range of

memory needs for facilities’ workflows

Answering Key Operational Questions

Capability: Diagnose code-related issues (e.g. impact of MPI message size on runtime)

0204060

256 1,024 4,096 16,384 65,536 262,144

Run

time

Message Size (B)

Architecture supports big data analysis,

provenance, and curation. Currently in production

on Blue Waters:

• Real-time collection and processing for 28,000 nodes and all sub-systems

* Process 20 B datums per day * Active storage of 11 trillion datums • 8,100 active unique log and data event types

* 50,000 different event types seen to date * Up to 1,470M log and data events/day (30M avg)

Capability: Inform design decisions for future systems

Tim

e

Key Strengths

Exascale-ready Features

10% 55%35%Worst % input queue stall across directions on Cray Gemini interconnect

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Duration of congestion

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Min

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Impact of TAS on system performance2014-08-01 2015-02-01 2015-05-01 2015-11-01

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Figures of merit on Cray Aries interconnect system

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Mon

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unroll factor, k=3

healthy

Node

memory leak.. ..

1

healthyN

2

State

1/Time between errors

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Numerical features (from performance counters)

Log clustering (e.g., modeling error propagation)

15,872 XE node NAMD job

NIC

inpu

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B/s)

per

pro

ject

060

00

Time0

500

10001500

20002500

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Prediction Real

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Textual features (from raw syslogs)Fe

atur

e Ex

trac

tion

and

Trai

ning

Visu

aliz

atio

n

Numerical clustering(e.g., Identify performance anomalies)

..

Pattern

..

2018/10/23 10:12

..

2018/10/23 10:08

host svc pid * [num] LNET Received down event for *1098

..

23956 .*LustreError:.*@@@ bulk PUT failed.*

Count Last seenPtn ID

357

Significance and Impact

0.00x00.053CoMD 0.0 0.0nid000[21-22]10396 2018-09-21 00:21:25 0.612018-09-21

00:19:16 2.75

0.0nid000[53,59] 2018-09-21 00:19:19

2018-09-21 00:21:28 0.0420.06CoMD 0.00x010397 0.590.1

0.0 0.01.552018-09-21 00:22:02 0.292018-09-21

00:19:26nid000[60-61] 0.21 0x010398 0.041lulesh

Comm Perf

0.0

App Perf

0.59

PAPI Perf

0.0

Anomalies

0x1

Mem Score

0.042

NW Congest

1.570.0

HPagesEnd Time

2018-09-21 00:30:40

Start Time

nid000[53,59] 2018-09-21 00:28:40CoMD

App ID Node IDJob ID

10399

0% 10% 20% 30% 40% 50%

HopsBandwidth

Stalls

Individual data points

Aggregated data points

Online congestion analysis

Job profile

System profile

Multivariate analyses of job and system

Visualization

Dat

a Av

aila

bilit

y (s

econ

ds)

Historical data analysis

ML-based feedback

and control

Expe

rt-dr

iven

Im

prov

emen

ts Data characterization

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Data Size (B)

Scalable System Design and Architecture Actionable Expert and ML-Driven Analysis

https://hmdsa.github.com/hmdsa

• ML/AI• Log and Event Analysis

Actionable IntelligenceData Collection

DataCollection

Feedback and Control

Analysis

Admin WebMOTD, Log Browsing,

Data Mini, WebPortal API

Dashboards

Analysis Research

System Visualization

Email, Text andEvent Notifications• ML/AI

• Signal Analysis• Log and Event Analysis• Event Prediction and Correlation

HIGH PERFORMANCE/PROJECT DRIVENANALYSIS AND PREDICTION TOOLS

PROCESSORINTERCONNECT STORAGE

EventLogs

Blade andCabinet

ControllerSensor Data

LDMS

Job ApplicationResource and Performance Data

NotificationSystem

Machine in the Loop Analysis FeedbackHuman in the LoopAnalysis Feedback

PowerSystem

FacilitySystems

EnvironmentalSystems

BUILDING AND FACILITIES

Parser

Syslog-NGDatabase and Active Data Repository

WebServer

Long Term Data Repository

Z+

Y+

X+006005004003 007

106105104103 107

016015014013 017

116115114113 117

Sandia National Laboratories is a multimission laboratory managed and operated by National Technology & Engineering Solutions of Sandia, LLC, a wholly owned subsidiary of Honeywell International Inc., for the U.S. Department of Energy’s National Nuclear Security Administration under contract DE-NA0003525.

Gentile, Ann
Gentile, Ann
Gentile, Ann
https://hmdsa.github.io/hmdsa