diff options
| -rwxr-xr-x | tools/perf/tests/shell/record.sh | 19 |
1 files changed, 18 insertions, 1 deletions
diff --git a/tools/perf/tests/shell/record.sh b/tools/perf/tests/shell/record.sh index 7964ebd9007d..36883b03169f 100755 --- a/tools/perf/tests/shell/record.sh +++ b/tools/perf/tests/shell/record.sh @@ -1,4 +1,4 @@ -#!/bin/sh +#!/bin/bash # perf record tests # SPDX-License-Identifier: GPL-2.0 @@ -23,6 +23,15 @@ br_cntr_file="/caps/branch_counter_nr" br_cntr_output="branch stack counters" br_cntr_script_output="br_cntr: A" +default_fd_limit=$(ulimit -Sn) +# With option --threads=cpu the number of open file descriptors should be +# equal to sum of: nmb_cpus * nmb_events (2+dummy), +# nmb_threads for perf.data.n (equal to nmb_cpus) and +# 2*nmb_cpus of pipes = 4*nmb_cpus (each pipe has 2 ends) +# All together it needs 8*nmb_cpus file descriptors plus some are also used +# outside of testing, thus raising the limit to 16*nmb_cpus +min_fd_limit=$(($(getconf _NPROCESSORS_ONLN) * 16)) + cleanup() { rm -rf "${perfdata}" rm -rf "${perfdata}".old @@ -197,11 +206,19 @@ test_branch_counter() { echo "Branch counter test [Success]" } +# raise the limit of file descriptors to minimum +if [[ $default_fd_limit -lt $min_fd_limit ]]; then + ulimit -Sn $min_fd_limit +fi + test_per_thread test_register_capture test_system_wide test_workload test_branch_counter +# restore the default value +ulimit -Sn $default_fd_limit + cleanup exit $err |