How can I profile a Java Native Interface library written in C?
I know about the usual C profilers, but my question is how can I profile the whole set including the calls to the JVM methods which might be slowing down the program.
After some research and testing with some of the methods proposed here I ended up using sprof
.
Basically I followed the instructions available in this answer . Some comments:
LD_PROFILE_OUTPUT
empty in order to get the result in /var/tmp/
, otherwise the output file was not generated. LD_PROFILE=libXXXX.so
To get the profile I ran the Java code which loads and uses the native JNI library and I got a file with the profiling results in:
/var/tmp/libXXXX.so.profile
Once you have the file you can read it using the command:
sprof /path/to/libXXXX.so /var/tmp/libXXXX.so.profile
The results of the profiling follow the same template as gprof
. Here you can find a description of the contents and their meaning.
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.