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pfm_self_start

NAME

pfm_self_start, pfm_self_stop - start and stop monitoring for a self-monitoring 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>