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function old new delta get_malloc_cpu_affinity - 76 +76 nproc_main 216 206 -10 process_pid_str 250 206 -44 ------------------------------------------------------------------------------ (add/remove: 2/0 grow/shrink: 0/2 up/down: 76/-54) Total: 22 bytes Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
29 lines
724 B
C
29 lines
724 B
C
/* vi: set sw=4 ts=4: */
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/*
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* Utility routines.
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*
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* Copyright (C) 2024 Denys Vlasenko
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*
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* Licensed under GPLv2, see file LICENSE in this source tree.
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*/
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#include <sched.h>
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#include "libbb.h"
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unsigned long* FAST_FUNC get_malloc_cpu_affinity(int pid, unsigned *sz)
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{
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unsigned long *mask = NULL;
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unsigned sz_in_bytes = *sz;
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for (;;) {
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mask = xrealloc(mask, sz_in_bytes);
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if (sched_getaffinity(pid, sz_in_bytes, (void*)mask) == 0)
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break; /* got it */
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sz_in_bytes *= 2;
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if (errno == EINVAL && (int)sz_in_bytes > 0)
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continue;
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bb_perror_msg_and_die("can't %cet pid %d's affinity", 'g', pid);
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}
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//bb_error_msg("get mask[0]:%lx sz_in_bytes:%d", mask[0], sz_in_bytes);
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*sz = sz_in_bytes;
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return mask;
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}
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