linux-kernel - [PATCH tip/core/rcu 22/30] doc: Document rcuperf's module parameters

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20200623003013.26252-22-paulmck@kernel.org>
Date:   Mon, 22 Jun 2020 17:30:05 -0700
From:   paulmck@...nel.org
To:     rcu@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, kernel-team@...com, mingo@...nel.org,
        jiangshanlai@...il.com, dipankar@...ibm.com,
        akpm@...ux-foundation.org, mathieu.desnoyers@...icios.com,
        josh@...htriplett.org, tglx@...utronix.de, peterz@...radead.org,
        rostedt@...dmis.org, dhowells@...hat.com, edumazet@...gle.com,
        fweisbec@...il.com, oleg@...hat.com, joel@...lfernandes.org,
        "Paul E. McKenney" <paulmck@...nel.org>
Subject: [PATCH tip/core/rcu 22/30] doc: Document rcuperf's module parameters

From: "Paul E. McKenney" <paulmck@...nel.org>

This commit adds documentation for the rcuperf module parameters.

Cc: Joel Fernandes (Google) <joel@...lfernandes.org>
Signed-off-by: Paul E. McKenney <paulmck@...nel.org>
---
 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.
-- 
2.9.5