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e093a222d7
evsel__increase_rlimit() helper does nothing with evsel, and description of the functionality is inaccurate, rename it and move to util/rlimit.c. By the way, fix a checkppatch warning about misplaced license tag: WARNING: Misplaced SPDX-License-Identifier tag - use line 1 instead #160: FILE: tools/perf/util/rlimit.h:3: /* SPDX-License-Identifier: LGPL-2.1 */ No functional change. Signed-off-by: Yang Jihong <yangjihong1@huawei.com> Link: https://lore.kernel.org/r/20231023033144.1011896-1-yangjihong1@huawei.com Signed-off-by: Namhyung Kim <namhyung@kernel.org>
57 lines
1.2 KiB
C
57 lines
1.2 KiB
C
/* SPDX-License-Identifier: LGPL-2.1 */
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#include <errno.h>
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#include "util/debug.h"
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#include "util/rlimit.h"
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#include <sys/time.h>
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#include <sys/resource.h>
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/*
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* Bump the memlock so that we can get bpf maps of a reasonable size,
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* like the ones used with 'perf trace' and with 'perf test bpf',
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* improve this to some specific request if needed.
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*/
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void rlimit__bump_memlock(void)
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{
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struct rlimit rlim;
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if (getrlimit(RLIMIT_MEMLOCK, &rlim) == 0) {
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rlim.rlim_cur *= 4;
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rlim.rlim_max *= 4;
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if (setrlimit(RLIMIT_MEMLOCK, &rlim) < 0) {
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rlim.rlim_cur /= 2;
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rlim.rlim_max /= 2;
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if (setrlimit(RLIMIT_MEMLOCK, &rlim) < 0)
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pr_debug("Couldn't bump rlimit(MEMLOCK), failures may take place when creating BPF maps, etc\n");
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}
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}
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}
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bool rlimit__increase_nofile(enum rlimit_action *set_rlimit)
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{
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int old_errno;
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struct rlimit l;
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if (*set_rlimit < INCREASED_MAX) {
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old_errno = errno;
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if (getrlimit(RLIMIT_NOFILE, &l) == 0) {
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if (*set_rlimit == NO_CHANGE) {
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l.rlim_cur = l.rlim_max;
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} else {
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l.rlim_cur = l.rlim_max + 1000;
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l.rlim_max = l.rlim_cur;
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}
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if (setrlimit(RLIMIT_NOFILE, &l) == 0) {
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(*set_rlimit) += 1;
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errno = old_errno;
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return true;
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}
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}
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errno = old_errno;
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}
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return false;
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}
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