X-Git-Url: https://git.lttng.org/?p=urcu.git;a=blobdiff_plain;f=README;h=b3839e1a614a134c4960cc96824cefca83078d69;hp=ca23d43fe3bee6b5e62d5cfcd0489bb93c7ffc2b;hb=fdf01eeda9f634a32db3fc90cd342da08d7a259d;hpb=795d506a10a06e05380ff275f31c588ca1e2cee8

diff --git a/README b/README
index ca23d43..b3839e1 100644
--- a/README
+++ b/README
@@ -44,19 +44,11 @@ Usage of liburcu
 
 	* #include <urcu.h>
 	* Link the application with "-lurcu".
-	* This is the preferred version of the library, both in terms of speed
-	  and flexibility. Requires a signal, typically SIGUSR1. Can be
-	  overridden with -DSIGURCU by modifying Makefile.build.inc.
-
-Usage of liburcu-mb
-
-	* #include <urcu.h>
-	* Compile any _LGPL_SOURCE code using this library with "-DURCU_MB".
-	* Link with "-lurcu-mb".
-	* This version of the urcu library does not need to
-	  reserve a signal number. URCU_MB uses full memory barriers for
-	  readers. This eliminates the need for signals but results in slower
-	  reads.
+	* This is the preferred version of the library, in terms of
+	  grace-period detection speed, read-side speed and flexibility.
+	  Dynamically detects kernel support for sys_membarrier(). Falls back
+	  on urcu-mb scheme if support is not present, which has slower
+	  read-side.
 
 Usage of liburcu-qsbr
 
@@ -68,13 +60,29 @@ Usage of liburcu-qsbr
 	  the threads are not active. It provides the fastest read-side at the
 	  expense of more intrusiveness in the application code.
 
+Usage of liburcu-mb
+
+	* #include <urcu.h>
+	* Compile any _LGPL_SOURCE code using this library with "-DRCU_MB".
+	* Link with "-lurcu-mb".
+	* This version of the urcu library uses memory barriers on the writer
+	  and reader sides. This results in faster grace-period detection, but
+	  results in slower reads.
+
+Usage of liburcu-signal
+
+	* #include <urcu-signal.h>
+	* Link the application with "-lurcu-signal".
+	* Version of the library that requires a signal, typically SIGUSR1. Can
+	  be overridden with -DSIGRCU by modifying Makefile.build.inc.
+
 Usage of liburcu-bp
 
 	* #include <urcu-bp.h>
 	* Link with "-lurcu-bp".
 	* The BP library flavor stands for "bulletproof". It is specifically
 	  designed to help tracing library to hook on applications without
-	  requiring to modify these applications. urcu_init(),
+	  requiring to modify these applications. rcu_init(),
 	  rcu_register_thread() and rcu_unregister_thread() all become nops.
 	  The state is dealt with by the library internally at the expense of
 	  read-side and write-side performance.