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Add kvm_getncpus() to obtain mp_ncpus.

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Sponsored by:	Nginx, Inc.
This commit is contained in:
Gleb Smirnoff 2014-02-12 19:22:48 +00:00
parent 2c566b9c4e
commit 9292aad4c9
3 changed files with 18 additions and 1 deletions
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1
lib/libkvm/kvm.h
View File

@ -77,6 +77,7 @@ char *kvm_geterr(kvm_t *);
char *kvm_getfiles(kvm_t *, int, int, int *);
int kvm_getloadavg(kvm_t *, double [], int);
int kvm_getmaxcpu(kvm_t *);
int kvm_getncpus(kvm_t *);
void *kvm_getpcpu(kvm_t *, int);
uint64_t kvm_counter_u64_fetch(kvm_t *, u_long);
struct kinfo_proc *

8
lib/libkvm/kvm_getpcpu.3
View File

@ -28,7 +28,7 @@
.\"
.\" $FreeBSD$
.\"
.Dd April 11, 2013
.Dd February 12, 2014
.Dt KVM_GETPCPU 3
.Os
.Sh NAME
@ -47,6 +47,8 @@
.Fn kvm_dpcpu_setcpu "kvm_t *kd" "u_int cpu"
.Ft int
.Fn kvm_getmaxcpu "kvm_t *kd"
.Ft int
.Fn kvm_getncpus "kvm_t *kd"
.Ft void *
.Fn kvm_getpcpu "kvm_t *kd" "int cpu"
.Ft ssize_t
@ -73,6 +75,10 @@ The
function returns the maximum number of CPUs supported by the kernel.
.Pp
The
.Fn kvm_getncpus
function returns the current number of CPUs in the kernel.
.Pp
The
.Fn kvm_getpcpu
function returns a buffer holding the per-CPU data for a single CPU.
This buffer is described by the

10
lib/libkvm/kvm_pcpu.c
View File

@ -173,6 +173,16 @@ kvm_getmaxcpu(kvm_t *kd)
return (maxcpu);
}
int
kvm_getncpus(kvm_t *kd)
{
if (mp_ncpus == 0)
if (_kvm_pcpu_init(kd) < 0)
return (-1);
return (mp_ncpus);
}
static int
_kvm_dpcpu_setcpu(kvm_t *kd, u_int cpu, int report_error)
{