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add loadavg calculation notes

This commit is contained in:
Doug MacEachern 2004-07-19 18:36:17 +00:00
parent 3b4d48a0ce
commit c92662082c
1 changed files with 12 additions and 1 deletions
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13
src/os/aix/aix_sigar.c
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@ -18,6 +18,7 @@
#include <sys/user.h> #include <sys/user.h>
#include <sys/utsname.h> #include <sys/utsname.h>
#include <sys/vmount.h> #include <sys/vmount.h>
#include <sys/proc.h>
#include <sys/socket.h> #include <sys/socket.h>
#include <arpa/inet.h> #include <arpa/inet.h>
@ -33,7 +34,17 @@
#include <sys/ldr.h> #include <sys/ldr.h>
#define FIXED_TO_DOUBLE(x) (((double)x) / 65536.0) /* not defined in aix 4.3 */
#ifndef SBITS
#define SBITS 16
#endif
/*
* from libperfstat.h:
* "To calculate the load average, divide the numbers by (1<<SBITS).
* SBITS is defined in <sys/proc.h>."
*/
#define FIXED_TO_DOUBLE(x) (((double)x) / (1<<SBITS))
/* these offsets wont change so just lookup them up during open */ /* these offsets wont change so just lookup them up during open */
static int get_koffsets(sigar_t *sigar) static int get_koffsets(sigar_t *sigar)