perf_counter tools: add help texts

Add Documentation/perf-stat.txt and Documentation/perf-top.txt.

The template that was used for it: Documentation/git-add.txt from Git.

Fix up small bugs to make these help texts show up both in the 'perf'
common-command summary output screen, and on the individual help screens.
Signed-off-by: NIngo Molnar <mingo@elte.hu>

Documentation/perf_counter/Documentation/perf-stat.txt

+perf-stat(1)
+==========
+
+NAME
+----
+perf-stat - Run a command and gather performance counter statistics
+
+SYNOPSIS
+--------
+[verse]
+'perf stat' [-e <EVENT> | --event=EVENT] [-l] [-a] <command>
+
+DESCRIPTION
+-----------
+This command runs a command and gathers performance counter statistics
+from it.
+
+
+OPTIONS
+-------
+<command>...::
+	Any command you can specify in a shell.
+
+-e::
+--event=::
+                             0:0: cpu-cycles          
+                             0:0: cycles              
+                             0:1: instructions        
+                             0:2: cache-references    
+                             0:3: cache-misses        
+                             0:4: branch-instructions 
+                             0:4: branches            
+                             0:5: branch-misses       
+                             0:6: bus-cycles          
+                             1:0: cpu-clock           
+                             1:1: task-clock          
+                             1:2: page-faults         
+                             1:2: faults              
+                             1:5: minor-faults        
+                             1:6: major-faults        
+                             1:3: context-switches    
+                             1:3: cs                  
+                             1:4: cpu-migrations      
+                             1:4: migrations          
+                           rNNN: raw PMU events (eventsel+umask)
+
+-a::
+        system-wide collection
+
+-l::
+        scale counter values
+
+Configuration
+-------------
+
+EXAMPLES
+--------
+
+$ perf stat sleep 1
+
+ Performance counter stats for 'sleep':
+
+       0.678356  task clock ticks     (msecs)
+              7  context switches     (events)
+              4  CPU migrations       (events)
+            232  pagefaults           (events)
+        1810403  CPU cycles           (events)
+         946759  instructions         (events)
+          18952  cache references     (events)
+           4885  cache misses         (events)
+
+ Wall-clock time elapsed:  1001.252894 msecs
+
+SEE ALSO
+--------
+linkperf:git-tops[1]

Documentation/perf_counter/Documentation/perf-top.txt

+perf-top(1)
+==========
+
+NAME
+----
+perf-top - Run a command and profile it
+
+SYNOPSIS
+--------
+[verse]
+'perf top' [-e <EVENT> | --event=EVENT] [-l] [-a] <command>
+
+DESCRIPTION
+-----------
+This command runs a command and gathers a performance counter profile
+from it.
+
+
+OPTIONS
+-------
+<command>...::
+	Any command you can specify in a shell.
+
+-e::
+--event=::
+                             0:0: cpu-cycles          
+                             0:0: cycles              
+                             0:1: instructions        
+                             0:2: cache-references    
+                             0:3: cache-misses        
+                             0:4: branch-instructions 
+                             0:4: branches            
+                             0:5: branch-misses       
+                             0:6: bus-cycles          
+                             1:0: cpu-clock           
+                             1:1: task-clock          
+                             1:2: page-faults         
+                             1:2: faults              
+                             1:5: minor-faults        
+                             1:6: major-faults        
+                             1:3: context-switches    
+                             1:3: cs                  
+                             1:4: cpu-migrations      
+                             1:4: migrations          
+                           rNNN: raw PMU events (eventsel+umask)
+
+-a::
+        system-wide collection
+
+-l::
+        scale counter values
+
+Configuration
+-------------
+
+EXAMPLES
+--------
+
+SEE ALSO
+--------
+linkperf:git-stat[1]

Documentation/perf_counter/builtin.h

@@ -14,6 +14,6 @@ extern void prune_packed_objects(int);
 extern int read_line_with_nul(char *buf, int size, FILE *file);
 extern int check_pager_config(const char *cmd);
 
-extern int cmd_top(int argc, char **argv, const char *prefix);
-extern int cmd_stat(int argc, char **argv, const char *prefix);
+extern int cmd_top(int argc, const char **argv, const char *prefix);
+extern int cmd_stat(int argc, const char **argv, const char *prefix);
 #endif

Documentation/perf_counter/generate-cmdlist.sh

@@ -9,16 +9,16 @@ struct cmdname_help
 
 static struct cmdname_help common_cmds[] = {"
 
-sed -n -e 's/^git-\([^ 	]*\)[ 	].* common.*/\1/p' command-list.txt |
+sed -n -e 's/^perf-\([^ 	]*\)[ 	].* common.*/\1/p' command-list.txt |
 sort |
 while read cmd
 do
      sed -n '
-     /^NAME/,/git-'"$cmd"'/H
+     /^NAME/,/perf-'"$cmd"'/H
      ${
             x
-            s/.*git-'"$cmd"' - \(.*\)/  {"'"$cmd"'", "\1"},/
+            s/.*perf-'"$cmd"' - \(.*\)/  {"'"$cmd"'", "\1"},/
 	    p
-     }' "Documentation/git-$cmd.txt"
+     }' "Documentation/perf-$cmd.txt"
 done
 echo "};"