dtrace discuss - Mar 2007 - system call count stats broken down by lwp

I''ve seen the dtruss DTrace script that will summarize statistics for
the system calls that have been made by a particular process.  I need to
generate a similar report, but I need the statistics broken down by lwp (for all
lwps in the process).  Is there an easy way of doing this?

I haven''t really used DTrace before.

Thanks in advance.
 
 
This message posted from opensolaris.org

Robert C. Broeckelmann Jr. wrote:
> I''ve seen the dtruss DTrace script that will summarize statistics
for the system calls that have been made by a particular process.  I need to
generate a similar report, but I need the statistics broken down by lwp (for all
lwps in the process).  Is there an easy way of doing this?
> 
> I haven''t really used DTrace before.
> 
> Thanks in advance.
Sure, try this:

# cat lwpsc.d
#!/usr/sbin/dtrace -qs

syscall:::entry
/pid == $1/
{
         @[tid,probefunc] = count();
}
END
{
         printf ("%10s %15s %6s\n","TID",
"Syscall","count");
         printa ("%10d %15s %@6d\n",@);
}

# chmod 755 lwpsc.d
./lwpsc.d 2167
^C
        TID         Syscall  count
          1           write      1
          7        lwp_park      3
          8        lwp_park      3
        122        lwp_park      3
        132        lwp_park      3
        139        lwp_park      3
        176        lwp_park      3
        178        lwp_park      3
        179        lwp_park      3
        180        lwp_park      3
          1        lwp_park     25
          4           write     29
          1         pollsys     30
          1           ioctl     31
          1            read     31
          4        lwp_park     54

Jim