feef239c36
numactl was only modifying its own CPU affinity, which is fine when creating a new process, but not very helpful when modifying an existing processes. Reviewed by: adrian Sponsored by: Dell Inc. Differential Revision: https://reviews.freebsd.org/D4927
286 lines
6.7 KiB
C
286 lines
6.7 KiB
C
/*
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* Copyright (c) 2015 Adrian Chadd <adrian@FreeBSD.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/cpuset.h>
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#include <sys/numa.h>
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#include <sys/resource.h>
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#include <sys/time.h>
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#include <ctype.h>
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#include <err.h>
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#include <errno.h>
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#include <getopt.h>
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#include <libgen.h>
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#include <limits.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sysexits.h>
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#include <unistd.h>
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static struct option longopts[] = {
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{ "tid", required_argument, NULL, 't' },
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{ "pid", required_argument, NULL, 'p' },
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{ "memdomain", required_argument, NULL, 'm' },
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{ "cpudomain", required_argument, NULL, 'c' },
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{ "mempolicy", required_argument, NULL, 'l' },
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{ "set", no_argument, NULL, 's' },
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{ "get", no_argument, NULL, 'g' },
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{ NULL, 0, NULL, 0 }
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};
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static const char *
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policy_to_str(vm_domain_policy_type_t vt)
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{
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switch (vt) {
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case VM_POLICY_NONE:
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return ("none");
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case VM_POLICY_ROUND_ROBIN:
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return ("rr");
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case VM_POLICY_FIXED_DOMAIN:
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return ("fixed-domain");
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case VM_POLICY_FIXED_DOMAIN_ROUND_ROBIN:
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return ("fixed-domain-rr");
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case VM_POLICY_FIRST_TOUCH:
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return ("first-touch");
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case VM_POLICY_FIRST_TOUCH_ROUND_ROBIN:
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return ("first-touch-rr");
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default:
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return ("unknown");
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}
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}
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static int
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parse_policy(struct vm_domain_policy_entry *vd, const char *str)
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{
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if (strcmp(str, "rr") == 0) {
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vd->policy = VM_POLICY_ROUND_ROBIN;
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vd->domain = -1;
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return (0);
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}
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if (strcmp(str, "first-touch-rr") == 0) {
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vd->policy = VM_POLICY_FIRST_TOUCH_ROUND_ROBIN;
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vd->domain = -1;
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return (0);
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}
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if (strcmp(str, "first-touch") == 0) {
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vd->policy = VM_POLICY_FIRST_TOUCH;
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vd->domain = -1;
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return (0);
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}
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if (strcmp(str, "fixed-domain") == 0) {
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vd->policy = VM_POLICY_FIXED_DOMAIN;
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vd->domain = 0;
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return (0);
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}
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if (strcmp(str, "fixed-domain-rr") == 0) {
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vd->policy = VM_POLICY_FIXED_DOMAIN_ROUND_ROBIN;
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vd->domain = 0;
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return (0);
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}
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return (-1);
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}
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static void
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usage(void)
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{
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printf("usage: numactl --get [--tid/-t <tid>] [--pid/-p <pid>]\n");
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printf(" numactl --set [--tid=<tid>] [--pid/-p<pid>]\n");
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printf(" [--mempolicy/-l <policy>] [--memdomain/"
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"-m <domain>]\n");
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printf(" [--cpudomain/-c <domain>]\n");
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printf(" numactl [--mempolicy/-l <policy>] [--memdomain/-m "
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"<domain>]\n");
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printf(" [--cpudomain/-c <domain>] <cmd> ...\n");
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exit(EX_USAGE);
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}
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static int
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set_numa_domain_cpuaffinity(int cpu_domain, cpuwhich_t which, id_t id)
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{
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cpuset_t set;
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int error;
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error = cpuset_getaffinity(CPU_LEVEL_WHICH, CPU_WHICH_DOMAIN,
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cpu_domain, sizeof(set), &set);
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if (error != 0)
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err(1, "cpuset_getaffinity");
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error = cpuset_setaffinity(CPU_LEVEL_WHICH, which, id, sizeof(set),
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&set);
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if (error != 0)
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err(1, "cpuset_setaffinity");
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return (0);
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}
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int
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main(int argc, char *argv[])
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{
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struct vm_domain_policy_entry vd;
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lwpid_t tid;
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pid_t pid;
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cpuwhich_t which;
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id_t id;
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int error;
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int is_set, is_get;
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int mem_policy_set;
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int ch;
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int cpu_domain;
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id = -1;
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which = -1;
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is_set = 0;
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is_get = 0;
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mem_policy_set = 0;
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tid = -1;
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pid = -1;
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cpu_domain = -1;
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while ((ch = getopt_long(argc, argv, "c:gl:m:p:st:", longopts,
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NULL)) != -1) {
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switch (ch) {
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case 'c':
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cpu_domain = atoi(optarg);
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break;
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case 'g':
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is_get = 1;
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break;
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case 'l':
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if (parse_policy(&vd, optarg) != 0) {
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fprintf(stderr,
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"Could not parse policy: '%s'\n", optarg);
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exit(1);
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}
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mem_policy_set = 1;
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break;
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case 'm':
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if (mem_policy_set == 0) {
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fprintf(stderr,
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"Error: set policy first before domain\n");
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exit(1);
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}
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vd.domain = atoi(optarg);
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break;
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case 'p':
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pid = atoi(optarg);
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break;
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case 's':
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is_set = 1;
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break;
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case 't':
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tid = atoi(optarg);
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break;
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default:
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usage();
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}
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}
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argc -= optind;
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argv += optind;
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/* Handle the user wishing to run a command */
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if (argc) {
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/* Ensure that a policy was set */
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if (mem_policy_set == 0) {
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fprintf(stderr, "Error: no policy given\n");
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usage();
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}
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/* Set current memory process policy, will be inherited */
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if (numa_setaffinity(CPU_WHICH_PID, -1, &vd) != 0)
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err(1, "numa_setaffinity");
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/* If a CPU domain policy was given, include that too */
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if (cpu_domain != -1)
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(void) set_numa_domain_cpuaffinity(cpu_domain,
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CPU_WHICH_PID, -1);
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errno = 0;
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execvp(*argv, argv);
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err(errno == ENOENT ? 127 : 126, "%s", *argv);
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}
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/* Figure out which */
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if (tid != -1) {
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which = CPU_WHICH_TID;
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id = tid;
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} else if (pid != -1) {
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which = CPU_WHICH_PID;
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id = pid;
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} else {
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fprintf(stderr, "Error: one of tid or pid must be given\n");
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usage();
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}
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/* Sanity checks */
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if (is_set && is_get) {
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fprintf(stderr, "Error: can't set both 'set' and 'get'\n");
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usage();
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}
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if (is_set && ! mem_policy_set) {
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fprintf(stderr, "Error: --set given, but no policy\n");
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usage();
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}
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/* If it's get, then get the policy and return */
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if (is_get) {
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error = numa_getaffinity(which, id, &vd);
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if (error != 0)
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err(1, "numa_getaffinity");
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printf(" Policy: %s; domain: %d\n",
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policy_to_str(vd.policy),
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vd.domain);
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exit(0);
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}
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/* Assume it's set */
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/* Syscall */
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error = numa_setaffinity(which, id, &vd);
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if (error != 0)
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err(1, "numa_setaffinity");
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/* If a CPU domain policy was given, include that too */
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if (cpu_domain != -1)
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(void) set_numa_domain_cpuaffinity(cpu_domain, which, id);
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exit(0);
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}
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