From 3a9241add947cb6d24b5de7a8927517426a78795 Mon Sep 17 00:00:00 2001 From: Rob Landley Date: Sat, 25 Aug 2012 14:25:22 -0500 Subject: Move commands into "posix", "lsb", and "other" menus/directories. --- toys/taskset.c | 110 --------------------------------------------------------- 1 file changed, 110 deletions(-) delete mode 100644 toys/taskset.c (limited to 'toys/taskset.c') diff --git a/toys/taskset.c b/toys/taskset.c deleted file mode 100644 index 7ac3b572..00000000 --- a/toys/taskset.c +++ /dev/null @@ -1,110 +0,0 @@ -/* vi: set sw=4 ts=4: - * - * taskset.c - Retrieve or set the CPU affinity of a process. - * - * Copyright 2012 Elie De Brauwer - * - * No standard. - -USE_TASKSET(NEWTOY(taskset, "<1^pa", TOYFLAG_BIN|TOYFLAG_STAYROOT)) - -config TASKSET - bool "taskset" - default y - help - usage: taskset [-ap] [mask] [PID | cmd [args...]] - - Launch a new task which may only run on certain processors, or change - the processor affinity of an exisitng PID. - - Mask is a hex string where each bit represents a processor the process - is allowed to run on. PID without a mask displays existing affinity. - - -p Set/get the affinity of given PID instead of a new command. - -a Set/get the affinity of all threads of the PID. -*/ - -#include "toys.h" - -#define FLAG_a 0x1 -#define FLAG_p 0x2 - -// Prototype for syscall wrappers sched.h refuses to give us -int sched_setaffinity(pid_t pid, size_t size, void *cpuset); -int sched_getaffinity(pid_t pid, size_t size, void *cpuset); - -// mask is an array of long, which makes the layout a bit weird on big -// endian systems but as long as it's consistent... - -static void do_taskset(pid_t pid, int quiet) -{ - unsigned long *mask = (unsigned long *)toybuf; - char *s = *toys.optargs, *failed = "failed to %s %d's affinity"; - int i, j, k; - - for (i=0; ; i++) { - if (!quiet) { - int j = sizeof(toybuf), flag = 0; - - if (sched_getaffinity(pid, sizeof(toybuf), (void *)mask)) - perror_exit(failed, "get", pid); - - printf("pid %d's %s affinity mask: ", pid, i ? "new" : "current"); - - while (j--) { - int x = 255 & (mask[j/sizeof(long)] >> (8*(j&(sizeof(long)-1)))); - - if (flag) printf("%02x", x); - else if (x) { - flag++; - printf("%x", x); - } - } - putchar('\n'); - } - - if (i || toys.optc < 2) return; - - memset(toybuf, 0, sizeof(toybuf)); - k = strlen(s = *toys.optargs); - s += k; - for (j = 0; j 9) digit = 10 + tolower(*s)-'a'; - if (digit > 15) error_exit("bad mask '%s'", *toys.optargs); - mask[j/(2*sizeof(long))] |= digit << 4*(j&((2*sizeof(long))-1)); - } - - if (sched_setaffinity(pid, sizeof(toybuf), (void *)mask)) - perror_exit(failed, "set", pid); - } -} - -static int task_callback(struct dirtree *new) -{ - if (!new->parent) return DIRTREE_RECURSE; - if (isdigit(*new->name)) do_taskset(atoi(new->name), 0); - - return 0; -} - -void taskset_main(void) -{ - if (!(toys.optflags & FLAG_p)) { - if (toys.optc < 2) error_exit("Needs 2 args"); - do_taskset(getpid(), 1); - xexec(toys.optargs+1); - } else { - char *c; - pid_t pid = strtol(toys.optargs[toys.optc-1], &c, 10); - - if (*c) error_exit("Not int %s", toys.optargs[1]); - - if (toys.optflags & FLAG_a) { - char buf[33]; - sprintf(buf, "/proc/%ld/task/", (long)pid); - dirtree_read(buf, task_callback); - } else do_taskset(pid, 0); - } -} -- cgit v1.2.3