From 783d57af7bb2b851c16cf87df848e0365e5052da Mon Sep 17 00:00:00 2001 From: Denys Vlasenko Date: Wed, 12 Apr 2017 13:58:40 +0200 Subject: Sort some miscutils/ applets into coreutils or util-linux No code changes Signed-off-by: Denys Vlasenko --- miscutils/taskset.c | 221 ---------------------------------------------------- 1 file changed, 221 deletions(-) delete mode 100644 miscutils/taskset.c (limited to 'miscutils/taskset.c') diff --git a/miscutils/taskset.c b/miscutils/taskset.c deleted file mode 100644 index 94a07383a..000000000 --- a/miscutils/taskset.c +++ /dev/null @@ -1,221 +0,0 @@ -/* vi: set sw=4 ts=4: */ -/* - * taskset - retrieve or set a processes' CPU affinity - * Copyright (c) 2006 Bernhard Reutner-Fischer - * - * Licensed under GPLv2 or later, see file LICENSE in this source tree. - */ - -//config:config TASKSET -//config: bool "taskset" -//config: default y -//config: help -//config: Retrieve or set a processes's CPU affinity. -//config: This requires sched_{g,s}etaffinity support in your libc. -//config: -//config:config FEATURE_TASKSET_FANCY -//config: bool "Fancy output" -//config: default y -//config: depends on TASKSET -//config: help -//config: Needed for machines with more than 32-64 CPUs: -//config: affinity parameter 0xHHHHHHHHHHHHHHHHHHHH can be arbitrarily long -//config: in this case. Otherwise, it is limited to sizeof(long). - -//applet:IF_TASKSET(APPLET(taskset, BB_DIR_USR_BIN, BB_SUID_DROP)) -//kbuild:lib-$(CONFIG_TASKSET) += taskset.o - -//usage:#define taskset_trivial_usage -//usage: "[-p] [HEXMASK] PID | PROG ARGS" -//usage:#define taskset_full_usage "\n\n" -//usage: "Set or get CPU affinity\n" -//usage: "\n -p Operate on an existing PID" -//usage: -//usage:#define taskset_example_usage -//usage: "$ taskset 0x7 ./dgemm_test&\n" -//usage: "$ taskset -p 0x1 $!\n" -//usage: "pid 4790's current affinity mask: 7\n" -//usage: "pid 4790's new affinity mask: 1\n" -//usage: "$ taskset 0x7 /bin/sh -c './taskset -p 0x1 $$'\n" -//usage: "pid 6671's current affinity mask: 1\n" -//usage: "pid 6671's new affinity mask: 1\n" -//usage: "$ taskset -p 1\n" -//usage: "pid 1's current affinity mask: 3\n" -/* - * Not yet implemented: - * -a/--all-tasks (affect all threads) - * needs to get TIDs from /proc/PID/task/ and use _them_ as "pid" in sched_setaffinity(pid) - * -c/--cpu-list (specify CPUs via "1,3,5-7") - */ - -#include -#include "libbb.h" - -typedef unsigned long ul; -#define SZOF_UL (unsigned)(sizeof(ul)) -#define BITS_UL (unsigned)(sizeof(ul)*8) -#define MASK_UL (unsigned)(sizeof(ul)*8 - 1) - -#if ENABLE_FEATURE_TASKSET_FANCY -#define TASKSET_PRINTF_MASK "%s" -/* craft a string from the mask */ -static char *from_mask(const ul *mask, unsigned sz_in_bytes) -{ - char *str = xzalloc((sz_in_bytes+1) * 2); /* we will leak it */ - char *p = str; - for (;;) { - ul v = *mask++; - if (SZOF_UL == 4) - p += sprintf(p, "%08lx", v); - if (SZOF_UL == 8) - p += sprintf(p, "%016lx", v); - if (SZOF_UL == 16) - p += sprintf(p, "%032lx", v); /* :) */ - sz_in_bytes -= SZOF_UL; - if ((int)sz_in_bytes <= 0) - break; - } - while (str[0] == '0' && str[1]) - str++; - return str; -} -#else -#define TASKSET_PRINTF_MASK "%lx" -static unsigned long long from_mask(ul *mask, unsigned sz_in_bytes UNUSED_PARAM) -{ - return *mask; -} -#endif - -static unsigned long *get_aff(int pid, unsigned *sz) -{ - int r; - unsigned long *mask = NULL; - unsigned sz_in_bytes = *sz; - - for (;;) { - mask = xrealloc(mask, sz_in_bytes); - r = sched_getaffinity(pid, sz_in_bytes, (void*)mask); - if (r == 0) - break; - sz_in_bytes *= 2; - if (errno == EINVAL && (int)sz_in_bytes > 0) - continue; - bb_perror_msg_and_die("can't %cet pid %d's affinity", 'g', pid); - } - //bb_error_msg("get mask[0]:%lx sz_in_bytes:%d", mask[0], sz_in_bytes); - *sz = sz_in_bytes; - return mask; -} - -int taskset_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; -int taskset_main(int argc UNUSED_PARAM, char **argv) -{ - ul *mask; - unsigned mask_size_in_bytes; - pid_t pid = 0; - unsigned opt_p; - const char *current_new; - char *aff; - - /* NB: we mimic util-linux's taskset: -p does not take - * an argument, i.e., "-pN" is NOT valid, only "-p N"! - * Indeed, util-linux-2.13-pre7 uses: - * getopt_long(argc, argv, "+pchV", ...), not "...p:..." */ - - opt_complementary = "-1"; /* at least 1 arg */ - opt_p = getopt32(argv, "+p"); - argv += optind; - - aff = *argv++; - if (opt_p) { - char *pid_str = aff; - if (*argv) { /* "-p ...rest.is.ignored..." */ - pid_str = *argv; /* NB: *argv != NULL in this case */ - } - /* else it was just "-p ", and *argv == NULL */ - pid = xatoul_range(pid_str, 1, ((unsigned)(pid_t)ULONG_MAX) >> 1); - } else { - /* */ - if (!*argv) - bb_show_usage(); - } - - mask_size_in_bytes = SZOF_UL; - current_new = "current"; - print_aff: - mask = get_aff(pid, &mask_size_in_bytes); - if (opt_p) { - printf("pid %d's %s affinity mask: "TASKSET_PRINTF_MASK"\n", - pid, current_new, from_mask(mask, mask_size_in_bytes)); - if (*argv == NULL) { - /* Either it was just "-p ", - * or it was "-p " and we came here - * for the second time (see goto below) */ - return EXIT_SUCCESS; - } - *argv = NULL; - current_new = "new"; - } - memset(mask, 0, mask_size_in_bytes); - - /* Affinity was specified, translate it into mask */ - /* it is always in hex, skip "0x" if it exists */ - if (aff[0] == '0' && (aff[1]|0x20) == 'x') - aff += 2; - - if (!ENABLE_FEATURE_TASKSET_FANCY) { - mask[0] = xstrtoul(aff, 16); - } else { - unsigned i; - char *last_char; - - i = 0; /* bit pos in mask[] */ - - /* aff is ASCII hex string, accept very long masks in this form. - * Process hex string AABBCCDD... to ulong mask[] - * from the rightmost nibble, which is least-significant. - * Bits not fitting into mask[] are ignored: (example: 1234 - * in 12340000000000000000000000000000000000000ff) - */ - last_char = strchrnul(aff, '\0'); - while (last_char > aff) { - char c; - ul val; - - last_char--; - c = *last_char; - if (isdigit(c)) - val = c - '0'; - else if ((c|0x20) >= 'a' && (c|0x20) <= 'f') - val = (c|0x20) - ('a' - 10); - else - bb_error_msg_and_die("bad affinity '%s'", aff); - - if (i < mask_size_in_bytes * 8) { - mask[i / BITS_UL] |= val << (i & MASK_UL); - //bb_error_msg("bit %d set", i); - } - /* else: - * We can error out here, but we don't. - * For one, kernel itself ignores bits in mask[] - * which do not map to any CPUs: - * if mask[] has one 32-bit long element, - * but you have only 8 CPUs, all bits beyond first 8 - * are ignored, silently. - * No point in making bits past 31th to be errors. - */ - i += 4; - } - } - - /* Set pid's or our own (pid==0) affinity */ - if (sched_setaffinity(pid, mask_size_in_bytes, (void*)mask)) - bb_perror_msg_and_die("can't %cet pid %d's affinity", 's', pid); - //bb_error_msg("set mask[0]:%lx", mask[0]); - - if (!argv[0]) /* "-p [...ignored...]" */ - goto print_aff; /* print new affinity and exit */ - - BB_EXECVP_or_die(argv); -} -- cgit v1.2.3