tail head cat sleep
QR code linking to this page
Main index Section 3
Go to:
Options

Manual Pages  — PMC_GET_DRIVER_STATS

NAME

pmc_get_driver_stats – retrieve driver statistics

CONTENTS

LIBRARY

Performance Counters Library (libpmc, -lpmc)

SYNOPSIS

#include <pmc.h>

int
pmc_get_driver_stats(struct pmc_driverstats *gms);

DESCRIPTION

The function pmc_get_driver_statistics() retrieves a snapshot of the usage statistics maintained by hwpmc(4) into the memory area pointed to by argument gms.

The returned structure includes the following fields:
pm_intr_ignored The number of sampling interrupts ignored.
pm_intr_processed The number of sampling interrupts processed.
pm_intr_bufferfull The number of sampling interrupts dropped due to lack of space in the sample buffer.
pm_syscalls The number of system calls into hwpmc(4).
pm_syscalls_errors The number of system calls into hwpmc(4) that failed.
pm_buffer_requests The number of log buffer requests so far.
pm_buffer_requests_failed
  The number of log buffer requests that failed due to lack of buffers.
pm_log_sweeps The number of sample buffer processing sweeps.

RETURN VALUES

Upon successful completion, the value 0 is returned; otherwise the value -1 is returned and the global variable errno is set to indicate the error.

SEE ALSO

pmc(3), hwpmc(4)
PMC_GET_DRIVER_STATS (3) November 25, 2007
tail head cat sleep
QR code linking to this page
Main index Section 3
Go to:
Options

Please direct any comments about this manual page service to Ben Bullock. Privacy policy.

“ Never write it in C if you can do it in `awk';
Never do it in `awk' if `sed' can handle it;
Never use `sed' when `tr' can do the job;
Never invoke `tr' when `cat' is sufficient;
Avoid using `cat' whenever possible. 		”
— Taylor's Laws of Programming