cc17b27a2b
3 sets of libraries are built now: . ack: all libraries that ack can compile (/usr/lib/i386/) . clang+elf: all libraries with minix headers (/usr/lib/) . clang+elf: all libraries with netbsd headers (/usr/netbsd/) Once everything can be compiled with netbsd libraries and headers, the /usr/netbsd hierarchy will be obsolete and its libraries compiled with netbsd headers will be installed in /usr/lib, and its headers in /usr/include. (i.e. minix libc and current minix headers set will be gone.) To use the NetBSD libc system (libraries + headers) before it is the default libc, see: http://wiki.minix3.org/en/DevelopersGuide/UsingNetBSDCode This wiki page also documents the maintenance of the patch files of minix-specific changes to imported NetBSD code. Changes in this commit: . libsys: Add NBSD compilation and create a safe NBSD-based libc. . Port rest of libraries (except libddekit) to new header system. . Enable compilation of libddekit with new headers. . Enable kernel compilation with new headers. . Enable drivers compilation with new headers. . Port legacy commands to new headers and libc. . Port servers to new headers. . Add <sys/sigcontext.h> in compat library. . Remove dependency file in tree. . Enable compilation of common/lib/libc/atomic in libsys . Do not generate RCSID strings in libc. . Temporarily disable zoneinfo as they are incompatible with NetBSD format . obj-nbsd for .gitignore . Procfs: use only integer arithmetic. (Antoine Leca) . Increase ramdisk size to create NBSD-based images. . Remove INCSYMLINKS handling hack. . Add nbsd_include/sys/exec_elf.h . Enable ELF compilation with NBSD libc. . Add 'make nbsdsrc' in tools to download reference NetBSD sources. . Automate minix-port.patch creation. . Avoid using fstavfs() as it is *extremely* slow and unneeded. . Set err() as PRIVATE to avoid name clash with libc. . [NBSD] servers/vm: remove compilation warnings. . u32 is not a long in NBSD headers. . UPDATING info on netbsd hierarchy . commands fixes for netbsd libc
66 lines
1.9 KiB
C
66 lines
1.9 KiB
C
/* ProcFS - util.c - by Alen Stojanov and David van Moolenbroek */
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#include "inc.h"
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/*===========================================================================*
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* procfs_getloadavg *
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*===========================================================================*/
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PUBLIC int procfs_getloadavg(struct load *loadavg, int nelem)
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{
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/* Retrieve system load average information.
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*/
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struct loadinfo loadinfo;
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u32_t system_hz, ticks_per_slot;
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int p, unfilled_ticks;
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int minutes[3] = { 1, 5, 15 };
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ssize_t l;
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if(nelem < 1) {
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errno = ENOSPC;
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return -1;
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}
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system_hz = sys_hz();
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if((l=sys_getloadinfo(&loadinfo)) != OK)
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return -1;
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if(nelem > 3)
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nelem = 3;
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/* How many ticks are missing from the newest-filled slot? */
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ticks_per_slot = _LOAD_UNIT_SECS * system_hz;
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unfilled_ticks =
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ticks_per_slot - (loadinfo.last_clock % ticks_per_slot);
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for(p = 0; p < nelem; p++) {
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int h, slots;
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int latest = loadinfo.proc_last_slot;
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slots = minutes[p] * 60 / _LOAD_UNIT_SECS;
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loadavg[p].proc_load = 0;
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/* Add up the total number of process ticks for this number
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* of minutes (minutes[p]). Start with the newest slot, which
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* is latest, and count back for the number of slots that
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* correspond to the right number of minutes. Take wraparound
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* into account by calculating the index modulo _LOAD_HISTORY,
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* which is the number of slots of history kept.
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*/
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for(h = 0; h < slots; h++) {
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int slot;
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slot = (latest - h + _LOAD_HISTORY) % _LOAD_HISTORY;
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loadavg[p].proc_load +=
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loadinfo.proc_load_history[slot];
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l += (double) loadinfo.proc_load_history[slot];
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}
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/* The load average over this number of minutes is the number
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* of process-ticks divided by the number of ticks, not
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* counting the number of ticks the last slot hasn't been
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* around yet.
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*/
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loadavg[p].ticks = slots * ticks_per_slot - unfilled_ticks;
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}
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return nelem;
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}
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