rcutorture: Documentation for rcuperf kernel parameters

This commit adds documentation for the new rcuperf module's kernel
boot parameters.

Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>

diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index ecc74fa..951af48 100644 (file)
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -3284,6 +3284,38 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
                        Lazy RCU callbacks are those which RCU can
                        prove do nothing more than free memory.
 
+       rcuperf.gp_exp= [KNL]
+                       Measure performance of expedited synchronous
+                       grace-period primitives.
+
+       rcuperf.nreaders= [KNL]
+                       Set number of RCU readers.  The value -1 selects
+                       N, where N is the number of CPUs.  A value
+                       "n" less than -1 selects N-n+1, where N is again
+                       the number of CPUs.  For example, -2 selects N
+                       (the number of CPUs), -3 selects N+1, and so on.
+                       A value of "n" less than or equal to -N selects
+                       a single reader.
+
+       rcuperf.nwriters= [KNL]
+                       Set number of RCU writers.  The values operate
+                       the same as for rcuperf.nreaders.
+                       N, where N is the number of CPUs
+
+       rcuperf.perf_runnable= [BOOT]
+                       Start rcuperf running at boot time.
+
+       rcuperf.shutdown= [KNL]
+                       Shut the system down after performance tests
+                       complete.  This is useful for hands-off automated
+                       testing.
+
+       rcuperf.perf_type= [KNL]
+                       Specify the RCU implementation to test.
+
+       rcuperf.verbose= [KNL]
+                       Enable additional printk() statements.
+
        rcutorture.cbflood_inter_holdoff= [KNL]
                        Set holdoff time (jiffies) between successive
                        callback-flood tests.