profiling fuse-python -

i writing fuse using fuse-python. it's doing should. however, after it's mounted few weeks, it's becoming noticeably slow. wanted profile it. know few point optimized. these should not culprits.

however, fuse-python hangs in infinite loop (see line 733 , 757 of fuse source). if run fuse in debug mode (using -d switch), run in foreground. however, cannot stop sigint nor ctrl+c (which anyway same).

i tried use signal module trap signal in main thread. not work either. interestingly, once shoot process down sigkill, see keyboardinterrupt on stdout. also, after sigkill, signal handler executed expected.

this has repercussions on profiling. process never terminates normally, cprofile never gets chance save stats file.

any ideas?

python installs handler raises keyboardinterrupt on sigint. if non-default signal handler detected when fuse's main called, not replace handler own, calls fuse_session_exit , cleans up. after you've called fuse's main, keyboardinterrupt swallowed cfunctype wrappers , never see them.

your options to:

• send sigquit pressing ctrl+\, or other terminating signal other sigint. fuse not exit cleanly.
• install default signal handler sigint before calling fuse's main, , restore original when you're done.

old_handler =signal(sigint, sig_dfl) # call main signal(sigint, old_handler) 

i'd highly recommend switch alternative binding also, fuse-python terribly messy , difficult work with. i've had lot of luck fusepy, , have submitted few patches there.

when you're able terminate fuse instance without using uncaught signals, python profiler able save stats per normal.