Hy!
I think i find some interesting problem (maybe it is basic :) ):
root@thelab ~/Tools/IPC$ ./ipc_count_syscall.d
syscall::semsys1690
root@thelab ~/Tools/IPC$ cat ./ipc_count_syscall.d
#!/usr/sbin/dtrace -qs
#pragma D option quiet
#pragma D
Hi Cni,
Your script is not operating the way you intended, but DTrace is
functioning properly. The fbt return probes are firing before the
syscall return probes and thus setting self-time to 0 so that when
the syscall return probe fires the predicate evaluates to false.
You don't seem to be
Hy!
In the script i used self-time = timestamp because in that version i
used @semcheck[this-name] = quantize(timestamp - self-time);.
After the letters i thinking and checking, there are syscall if i
check only entry:
root@thelab ~/Tools/IPC$ ./ipc_count_entry.d
fbt:ipc:ipcs_lock
