xref: /freebsd/lib/libpmc/pmc_get_driver_stats.3 (revision 2f6a179eb910129fb812c1ad1bdc300da1203dc0)
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24.\" $FreeBSD$
25.\"
26.Dd November 25, 2007
27.Os
28.Dt PMC_GET_DRIVER_STATS 3
29.Sh NAME
30.Nm pmc_get_driver_stats
31.Nd retrieve driver statistics
32.Sh LIBRARY
33.Lb libpmc
34.Sh SYNOPSIS
35.In pmc.h
36.Ft int
37.Fn pmc_get_driver_stats "struct pmc_driverstats *gms"
38.Sh DESCRIPTION
39The function
40.Fn pmc_get_driver_statistics
41retrieves a snapshot of the usage statistics maintained by
42.Xr hwpmc 4
43into the memory area pointed to by argument
44.Fa gms .
45.Pp
46The returned structure includes the following fields:
47.Bl -tag -width pmc_intr_bufferfull -offset indent -compact
48.It pm_intr_ignored
49The number of sampling interrupts ignored.
50.It pm_intr_processed
51The number of sampling interrupts processed.
52.It pm_intr_bufferfull
53The number of sampling interrupts dropped due to lack of space
54in the sample buffer.
55.It pm_syscalls
56The number of system calls into
57.Xr hwpmc 4 .
58.It pm_syscalls_errors
59The number of system calls into
60.Xr hwpmc 4
61that failed.
62.It pm_buffer_requests
63The number of log buffer requests so far.
64.It pm_buffer_requests_failed
65The number of log buffer requests that failed due to lack of buffers.
66.It pm_log_sweeps
67The number of sample buffer processing sweeps.
68.El
69.Sh RETURN VALUES
70.Rv -std
71.Sh SEE ALSO
72.Xr pmc 3 ,
73.Xr hwpmc 4
74