search

AdoptOpenJDK / jitwatch

Log analyser / visualiser for Java HotSpot JIT compiler. Inspect inlining decisions, hot methods, bytecode, and assembly. View results in the JavaFX user interface.
Other
3.07k stars 437 forks source link

Is it possible to make jarScan more verbose? #279

Closed zsokolowski closed 6 years ago

zsokolowski commented 6 years ago

Hi I'm waiting for report for prolonged time and I'm not sure what is going on. Is there possibility to make it more verbose?

chriswhocodes commented 6 years ago

Hi, Are you using Java 8 or Java 9? If you are using Java 8 then JarScan will use the API form of javap (com.sun.tools.javap.JavapTask). This is not available in Java 9 (due to modularisation changes) so JarScan has to repeatedly invoke the javap binary using a ProcessBuilder which is much slower :(

I've deliberately not added any status output to JarScan so that it's entire output (CSV format) can be piped into another tool.

Can I ask what size is the jar file / folder you are scanning?

Cheers,

Chris

zsokolowski commented 6 years ago

Hi Chris, thanks for the answer. Java 8 latest build 162 AFAIK. Jar is about 5.6 MB. Maybe another output could be possible with the certain flag? And indication that process is progressing. I used Cpu time used by the Windows. However I wasn't sure if proceses is advancing at all.

Cheers, Zbigniew

chriswhocodes commented 6 years ago

Fixed in https://github.com/AdoptOpenJDK/jitwatch/commit/66a3309efa2c35aff963882166fc9d7a3739e902

Use the --verbose switch to print progress info to stderr e.g. ./jarScan.sh --verbose --mode=MaxMethodSize --limit=325 /home/chris/java/jre/lib/rt.jar