40 lines
1.3 KiB
Diff
40 lines
1.3 KiB
Diff
From 3359c4464c2a13ab04f15598b1c79040399978f5 Mon Sep 17 00:00:00 2001
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From: Clark Williams <williams@redhat.com>
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Date: Tue, 21 Jul 2020 16:10:22 -0500
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Subject: [PATCH] pi_stress: limit the number of inversion groups to the number
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of online cores
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Each inversion group is three SCHED_FIFO threads, so the chances of more groups
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than online cores actually getting to run is very slim. Limit the number of
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groups requested to be <= the number of online cpus.
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Signed-off-by: Clark Williams <williams@redhat.com>
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Changing the conversion in printf to %ld since the number of online
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processors is a long.
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Signed-off-by: John Kacur <jkacur@redhat.com>
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---
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src/pi_tests/pi_stress.c | 6 ++++++
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1 file changed, 6 insertions(+)
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diff --git a/src/pi_tests/pi_stress.c b/src/pi_tests/pi_stress.c
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index 0ed844c636cd..eba21d7727bc 100644
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--- a/src/pi_tests/pi_stress.c
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+++ b/src/pi_tests/pi_stress.c
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@@ -1327,6 +1327,12 @@ void process_command_line(int argc, char **argv)
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break;
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case 'g':
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ngroups = strtol(optarg, NULL, 10);
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+ if (ngroups > num_processors) {
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+ pi_error("the number of groups cannot exceed "
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+ "the number of online processors (%ld)\n",
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+ num_processors);
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+ exit(-1);
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+ }
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pi_info("number of groups set to %d\n", ngroups);
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break;
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case 'r':
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--
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2.26.2
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