diff options
Diffstat (limited to 'lib/libkvm/kvm_getpcpu.3')
| -rw-r--r-- | lib/libkvm/kvm_getpcpu.3 | 37 |
1 files changed, 35 insertions, 2 deletions
diff --git a/lib/libkvm/kvm_getpcpu.3 b/lib/libkvm/kvm_getpcpu.3 index 1e0c1f4f48c3..4087f1c2b175 100644 --- a/lib/libkvm/kvm_getpcpu.3 +++ b/lib/libkvm/kvm_getpcpu.3 @@ -28,7 +28,7 @@ .\" .\" $FreeBSD$ .\" -.Dd February 28, 2010 +.Dd April 11, 2013 .Dt KVM_GETPCPU 3 .Os .Sh NAME @@ -49,6 +49,10 @@ .Fn kvm_getmaxcpu "kvm_t *kd" .Ft void * .Fn kvm_getpcpu "kvm_t *kd" "int cpu" +.Ft ssize_t +.Fn kvm_read_zpcpu "kvm_t *kd" "void *buf" "u_long base" "size_t size" "int cpu" +.Ft uint64_t +.Fn kvm_counter_u64_fetch "kvm_t *kd" "u_long base" .Sh DESCRIPTION The .Fn kvm_dpcpu_setcpu , @@ -83,6 +87,28 @@ is not active, then .Dv NULL is returned instead. .Pp +The +.Fn kvm_read_zpcpu +function is used to obtain private per-CPU copy from a +.Dv UMA_ZONE_PCPU +.Xr zone 9 . +It takes +.Fa base +argument as base address of an allocation and copyies +.Fa size +bytes into +.Fa buf +from the part of allocation that is private to +.Fa cpu . +.Pp +The +.Fn kvm_counter_u64_fetch +function fetches value of a +.Xr counter 9 +pointed by +.Fa base +address. +.Pp Symbols for dynamic per-CPU data are accessed via .Xr kvm_nlist 3 as with other symbols. @@ -122,9 +148,16 @@ On success, the .Fn kvm_dpcpu_setcpu call returns 0; if an error occurs, it returns -1 instead. .Pp +On success, the +.Fn kvm_read_zpcpu +function returns number of bytes copied. +If an error occurs, it returns -1 instead. +.Pp If any function encounters an error, then an error message may be retrieved via .Xr kvm_geterr 3 . .Sh SEE ALSO .Xr free 3 , -.Xr kvm 3 +.Xr kvm 3 , +.Xr counter 9 , +.Xr zone 9 |