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DTSTART:19700308T020000
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DTSTAMP:20260522T150124Z
LOCATION:D161
DTSTART;TZID=America/Chicago:20181116T094000
DTEND;TZID=America/Chicago:20181116T100000
UID:submissions.supercomputing.org_SC18_sess153_ws_espt101@linklings.com
SUMMARY:Advanced Event Sampling Support for PAPI
DESCRIPTION:Forrest Smith and Vincent Weaver (University of Maine)\n\nThe 
 PAPI performance library is a widely used tool for gathering  performance 
 data from running applications. Modern processors support advanced samplin
 g interfaces, such as Intel's Precise Event Based Sampling (PEBS) and AMD'
 s Instruction Based Sampling (IBS). The current PAPI sampling interface pr
 edates the existence of these interfaces and only provides simple instruct
 ion-pointer based samples.\n\nWe propose a new, improved, sampling interfa
 ce that provides support for the extended sampling information available o
 n modern hardware. We extend the PAPI interface to add a new PAPI_sample_i
 nit call that uses the Linux perf_event interface to access the extra samp
 led information. A pointer to these samples is returned to the user, who c
 an either decode them on the fly, or write them to disk for later analysis
 .\n\nBy providing extended sampling information, this new PAPI interface a
 llows advanced performance analysis and optimization that was previously n
 ot possible. This will enhance the ability to optimize software in modern 
 extreme-scale programming environments.\n\nTag: Performance, Productivity\
 n\nRegistration Category: Workshop Reg Pass\n\nSession Chairs: Martin Schu
 lz (Technical University of Munich, Leibniz Supercomputing Centre (LRZ)) a
 nd Felix Wolf (Technical University of Darmstadt)\n\n
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