The following commit has been merged into the core/rcu branch of tip: Commit-ID: 847dd70aa971a67b4dfdb8f131428dfb90d88714 Gitweb: https://git.kernel.org/tip/847dd70aa971a67b4dfdb8f131428dfb90d88714 Author: Paul E. McKenney <paulmck@xxxxxxxxxx> AuthorDate: Fri, 29 May 2020 14:24:03 -07:00 Committer: Paul E. McKenney <paulmck@xxxxxxxxxx> CommitterDate: Mon, 29 Jun 2020 12:00:45 -07:00 doc: Document rcuperf's module parameters This commit adds documentation for the rcuperf module parameters. Cc: Joel Fernandes (Google) <joel@xxxxxxxxxxxxxxxxx> Signed-off-by: Paul E. McKenney <paulmck@xxxxxxxxxx> --- Documentation/admin-guide/kernel-parameters.txt | 36 ++++++++++++++++- 1 file changed, 36 insertions(+) diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt index fb95fad..20cd00b 100644 --- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -4407,6 +4407,42 @@ reboot_cpu is s[mp]#### with #### being the processor to be used for rebooting. + refperf.holdoff= [KNL] + Set test-start holdoff period. The purpose of + this parameter is to delay the start of the + test until boot completes in order to avoid + interference. + + refperf.loops= [KNL] + Set the number of loops over the synchronization + primitive under test. Increasing this number + reduces noise due to loop start/end overhead, + but the default has already reduced the per-pass + noise to a handful of picoseconds on ca. 2020 + x86 laptops. + + refperf.nreaders= [KNL] + Set number of readers. The default value of -1 + selects N, where N is roughly 75% of the number + of CPUs. A value of zero is an interesting choice. + + refperf.nruns= [KNL] + Set number of runs, each of which is dumped onto + the console log. + + refperf.readdelay= [KNL] + Set the read-side critical-section duration, + measured in microseconds. + + refperf.shutdown= [KNL] + Shut down the system at the end of the performance + test. This defaults to 1 (shut it down) when + rcuperf is built into the kernel and to 0 (leave + it running) when rcuperf is built as a module. + + refperf.verbose= [KNL] + Enable additional printk() statements. + relax_domain_level= [KNL, SMP] Set scheduler's default relax_domain_level. See Documentation/admin-guide/cgroup-v1/cpusets.rst.
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