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https://issues.apache.org/jira/browse/LUCENE-10099?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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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}
>
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