[ https://issues.apache.org/jira/browse/LUCENE-10099?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Mark Robert Miller updated LUCENE-10099: ---------------------------------------- Description: Allow async-profiler in addition to the JFR profiler. async profiler description: {noformat} This project is a low overhead sampling profiler for Java that does not suffer from Safepoint bias problem. It features HotSpot-specific APIs to collect stack traces and to track memory allocations. The profiler works with OpenJDK, Oracle JDK and other Java runtimes based on the HotSpot JVM. async-profiler can trace the following kinds of events: * CPU cycles * Hardware and Software performance counters like cache misses, branch misses, page faults, context switches etc. * Allocations in Java Heap * Contented lock attempts, including both Java object monitors and ReentrantLocks {noformat} The "tests.asyncprofile" mode switch turns on the async-profiler ([https://github.com/jvm-profiling-tools/async-profiler]) during test execution, and prints a simple summary at the end. For example, top-10 histogram of methods (cpu samples): {noformat} gradlew -p lucene/core test -Ptests.asyncprofile=true{noformat} Alternatively, you can profile heap allocations instead: TBD *Requirements* * You need to download async-profiler 2.x ([https://github.com/jvm-profiling-tools/async-profiler]) * You need the .so lib in a standard shared folder or one of the directories from LD_LIBRARY_PATH (Linux, though not Arch by default), DYLD_LIBRARY_PATH (Mac OS), or -Djava.library.path. I think ${HOME}/libs also works on Linux. We could also allow specifying the location directly as an option. * Debug version of Java is important for best results and is required for heap allocation profiling. Available as package on Ubuntu, can be built with a small modification on Arch. The following permissions need to be set to allow for the proper permissions for profiling: {noformat} # sysctl kernel.perf_event_paranoid=1 # sysctl kernel.kptr_restrict=0{noformat} was: Allow async profiler in addition to the JFR profiler. async profiler description: {noformat} This project is a low overhead sampling profiler for Java that does not suffer from Safepoint bias problem. It features HotSpot-specific APIs to collect stack traces and to track memory allocations. The profiler works with OpenJDK, Oracle JDK and other Java runtimes based on the HotSpot JVM. async-profiler can trace the following kinds of events: * CPU cycles * Hardware and Software performance counters like cache misses, branch misses, page faults, context switches etc. * Allocations in Java Heap * Contented lock attempts, including both Java object monitors and ReentrantLocks {noformat} The "tests.asyncprofile" mode switch turns on the async profiler ([https://github.com/jvm-profiling-tools/async-profiler]) during test execution, and prints a simple summary at the end. For example, top-10 histogram of methods (cpu samples): {noformat} gradlew -p lucene/core test -Ptests.asyncprofile=true{noformat} Alternatively, you can profile heap allocations instead: TBD *Requirements* * You need to download async profiler 2.x ([https://github.com/jvm-profiling-tools/async-profiler]) * You need the .so lib in a standard shared folder or one of the directories from LD_LIBRARY_PATH (Linux, though not Arch by default), DYLD_LIBRARY_PATH (Mac OS), or -Djava.library.path. I think ${HOME}/libs also works on Linux. We could also allow specifying the location directly as an option. * Debug version of Java is important for best results and is required for heap allocation profiling. Available as package on Ubuntu, can be built with a small modification on Arch. The following permissions need to be set to allow for the proper permissions for profiling: {noformat} # sysctl kernel.perf_event_paranoid=1 # sysctl kernel.kptr_restrict=0{noformat} > Add -Ptests.asyncprofile option. > -------------------------------- > > Key: LUCENE-10099 > URL: https://issues.apache.org/jira/browse/LUCENE-10099 > Project: Lucene - Core > Issue Type: Test > Components: modules/test-framework > Reporter: Mark Robert Miller > Assignee: Mark Robert Miller > Priority: Minor > Time Spent: 40m > Remaining Estimate: 0h > > Allow async-profiler in addition to the JFR profiler. > async profiler description: > {noformat} > This project is a low overhead sampling profiler for Java that does not > suffer from Safepoint bias problem. > It features HotSpot-specific APIs to collect stack traces and to track memory > allocations. > The profiler works with OpenJDK, Oracle JDK and other Java runtimes based on > the HotSpot JVM. > async-profiler can trace the following kinds of events: > * CPU cycles > * Hardware and Software performance counters like cache misses, branch > misses, page faults, context switches etc. > * Allocations in Java Heap > * Contented lock attempts, including both Java object monitors and > ReentrantLocks > {noformat} > > The "tests.asyncprofile" mode switch turns on the async-profiler > ([https://github.com/jvm-profiling-tools/async-profiler]) during test > execution, > and prints a simple summary at the end. > For example, top-10 histogram of methods (cpu samples): > {noformat} > gradlew -p lucene/core test -Ptests.asyncprofile=true{noformat} > Alternatively, you can profile heap allocations instead: TBD > *Requirements* > * You need to download async-profiler 2.x > ([https://github.com/jvm-profiling-tools/async-profiler]) > * You need the .so lib in a standard shared folder or one of the directories > from LD_LIBRARY_PATH (Linux, though not Arch by > default), DYLD_LIBRARY_PATH (Mac OS), or -Djava.library.path. I think > ${HOME}/libs also works > on Linux. We could also allow specifying the location directly as an option. > * Debug version of Java is important for best results and is required for > heap allocation profiling. Available as package on Ubuntu, can be built with > a small modification on Arch. > The following permissions need to be set to allow for the proper permissions > for profiling: > {noformat} > # sysctl kernel.perf_event_paranoid=1 > # sysctl kernel.kptr_restrict=0{noformat} > -- This message was sent by Atlassian Jira (v8.3.4#803005) --------------------------------------------------------------------- To unsubscribe, e-mail: issues-unsubscr...@lucene.apache.org For additional commands, e-mail: issues-h...@lucene.apache.org