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 87d40a72f6a1bec998be718138347a875c00117a..6c13d2f9dd0443efcdf8d6b00217dbd5050afc5c 100644 (file)
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -3233,6 +3233,38 @@ 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.
 
                        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.
        rcutorture.cbflood_inter_holdoff= [KNL]
                        Set holdoff time (jiffies) between successive
                        callback-flood tests.