59 lines
1.6 KiB
Diff
59 lines
1.6 KiB
Diff
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From b4543efe798bbc255519fdcec73484cbd43472d1 Mon Sep 17 00:00:00 2001
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From: Sandipan Das <sandipan.das@amd.com>
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Date: Mon, 18 Apr 2022 10:59:26 +0530
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Subject: [PATCH 13/15] common: Fix perf init for large systems
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Large systems with hundreds of CPUs can run into issues
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during perf event initialization because of the default
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resource limits for file descriptors. Set RLIMIT_NOFILE
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explicitly to a fairly large value to avoid them.
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Signed-off-by: Sandipan Das <sandipan.das@amd.com>
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---
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common/os/os_perf.c | 16 ++++++++++++++++
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1 file changed, 16 insertions(+)
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diff --git a/common/os/os_perf.c b/common/os/os_perf.c
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index 44ca43d..49fdaaa 100644
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--- a/common/os/os_perf.c
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+++ b/common/os/os_perf.c
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@@ -28,6 +28,7 @@
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#include <inttypes.h>
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#include <stdlib.h>
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+#include <sys/resource.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include <string.h>
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@@ -850,12 +851,27 @@ ll_init(pf_conf_t *conf)
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int
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os_perf_init(void)
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{
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+ struct rlimit limit;
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int ringsize, size;
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s_profiling_recbuf = NULL;
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s_ll_recbuf = NULL;
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s_partpause_enabled = B_FALSE;
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+ /*
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+ * Depending on the number of available CPUs in the system, the
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+ * default fd limit may be exceeded. Set it to a large value to
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+ * avoid running into problems.
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+ */
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+ limit.rlim_cur = 32768;
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+ limit.rlim_max = 32768;
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+
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+ if (setrlimit(RLIMIT_NOFILE, &limit) < 0) {
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+ exit_msg_put("Failed to setup perf!\n");
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+ debug_print(NULL, 2, "os_perf_init failed\n");
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+ return (-1);
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+ }
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+
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ringsize = pf_ringsize_init();
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size = ((ringsize / sizeof (pf_profiling_rbrec_t)) + 1) *
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sizeof (pf_profiling_rec_t);
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--
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2.31.1
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