On 11-10-05 01:09 PM, Venkatesh Babu Chitlur Srinivasa (vchitlur) wrote: > I followed the instructions in > http://git.lttng.org/?p=lttv.git;a=blob_plain;f=LTTngManual.html#install > lttng to enable the tracing for only the system call enter/exits on > MontaVista kernel. So I loaded only the ltt-* modules and > syscall-trace. > > I did mount debugfs and enabled only syscall enter/exit. > > echo 1 > /mnt/debugfs/ltt/markers/kernel/syscall_entry/enable > echo 1 > /mnt/debugfs/ltt/markers/kernel/syscall_exit/enable > > lttctl -C -w /tmp/trace1 trace1 trace1 > > lttctl -D trace1 > > lttv -mtextDump -t /tmp/trace1 > > But it is only tracing the syscall exits but not syscall enter. > > kernel.syscall_exit: 0.991063935 (/tmp/trace1/kernel_3), 0, 0, , , 0, > 0x0, MODE_UNKNOWN { ret = 0 } > kernel.syscall_exit: 0.991065411 (/tmp/trace1/kernel_3), 0, 0, , , 0, > 0x0, MODE_UNKNOWN { ret = 1 } > kernel.syscall_exit: 0.991066830 (/tmp/trace1/kernel_3), 0, 0, , , 0, > 0x0, MODE_UNKNOWN { ret = 2 } > kernel.syscall_exit: 0.991068682 (/tmp/trace1/kernel_3), 0, 0, , , 0, > 0x0, MODE_UNKNOWN { ret = 0 } > kernel.syscall_exit: 0.991203430 (/tmp/trace1/kernel_3), 0, 0, , , 0, > 0x0, MODE_UNKNOWN { ret = 718741504 } > kernel.syscall_exit: 0.991255070 (/tmp/trace1/kernel_3), 0, 0, , , 0, > 0x0, MODE_UNKNOWN { ret = 0 } > kernel.syscall_exit: 0.991300875 (/tmp/trace1/kernel_3), 0, 0, , , 0, > 0x0, MODE_UNKNOWN { ret = 8060 } > kernel.syscall_exit: 0.991322296 (/tmp/trace1/kernel_2), 0, 0, , , 0, > 0x0, MODE_UNKNOWN { ret = 0 } > > Even when I loaded the all the other trace modules and did ltt-armall, > still I am seeing the traces for only syscall_exit but not for > syscall_enter. Am I missing something here?
Just out of curiosity, are you grep'ing to get this output? The event name is syscall_entry, not _enter, so grep obviously wouldn't find anything. -- Alexandre Montplaisir DORSAL lab, École Polytechnique de Montréal _______________________________________________ ltt-dev mailing list [email protected] http://lists.casi.polymtl.ca/cgi-bin/mailman/listinfo/ltt-dev
