kvm_getloadavg(3) - NetBSD Manual Pages

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KVM_GETLOADAVG(3)       NetBSD Library Functions Manual      KVM_GETLOADAVG(3)


NAME

     kvm_getloadavg -- get system load averages, from live or dead kernels


LIBRARY

     Kernel Data Access Library (libkvm, -lkvm)


SYNOPSIS

     #include <sys/resource.h>
     #include <kvm.h>

     int
     kvm_getloadavg(kvm_t *kd, double loadavg[], int nelem);


DESCRIPTION

     The kvm_getloadavg() function returns the number of processes in the sys-
     tem run queue of the kernel or core file, indicated by kd.  Up to nelem
     samples are retrieved and assigned to successive elements of loadavg[].
     The system imposes a maximum of 3 samples, representing averages over the
     last 1, 5, and 15 minutes, respectively.  On a live system, the load
     average is obtained by calling getloadavg(3).  If performing post mortem
     on a kernel core file, kvm_getloadavg is able to extract the system load
     averages at the time of death from the core file directly.


RETURN VALUES

     If the load average was unobtainable, -1 is returned; otherwise, the num-
     ber of samples actually retrieved is returned.


SEE ALSO

     uptime(1), getloadavg(3), kvm(3), kvm_open(3), sysctl(3)

NetBSD 9.4_STABLE              December 11, 2018             NetBSD 9.4_STABLE