LIBPFM(3)
NAME
pfm_self_start, pfm_self_stop - start and stop monitoring for a selfmonitoring process
SYNOPSIS
#include <perfmon/pfmlib.h> int pfm_self_start(int fd); int pfm_self_stop(int fd);
DESCRIPTION
These two functions can only be used by self-monitoring processes.
They have no effect on system wide sessions.
The pfm_self_start function activates monitoring. This function is
equivalent to calling perfmonctl() with the PFM_START command and may
end up calling it. On Linux/ia64 it is implemented as a lightweight
call to set the psr.up bit.
The pfm_self_stop function deactivates monitoring This function is
equivalent to calling perfmonctl() with the PFM_STOP command and may
end up calling it.On Linux/ia64 it is implemented as a lightweight call
to clear the psr.up bit.
RETURN
The function returns 0 if successful, otherwise -1 and the error code
is set in errno.
ERRORS
0 is always returned on Linux/ia64.
AUTHOR
- Stephane Eranian <eranian@hpl.hp.com>