From 4038f87747b78a62074309174558045e1adef939 Mon Sep 17 00:00:00 2001
From: johannst <johannes.stoelp@gmail.com>
Date: Tue, 17 Mar 2020 22:15:55 +0100
Subject: updated perf

---
 src/perf.md | 22 +++++++++++-----------
 1 file changed, 11 insertions(+), 11 deletions(-)

diff --git a/src/perf.md b/src/perf.md
index 003e164..57118ed 100644
--- a/src/perf.md
+++ b/src/perf.md
@@ -1,8 +1,7 @@
 # perf(1)
 
 ```markdown
-perf list
-  ......... show supported hw/sw events
+perf list      show supported hw/sw events
 
 perf stat
   -p <pid> .. show stats for running process
@@ -18,7 +17,8 @@ perf record
   -p <pid> ............... record stats for running process
   -F <hz> ................ sampling frequency
   --call-graph <method> .. [fp, dwarf, lbr] method how to caputre backtrace
-                           fp   : use frame-pointer, need -fno-omit-frame-pointer
+                           fp   : use frame-pointer, need to compile with
+                                  -fno-omit-frame-pointer
                            dwarf: use .cfi debug information
                            lbr  : use hardware last branch record facility
   -g ..................... short-hand for --call-graph fp
@@ -30,26 +30,26 @@ perf report
   -g graph,0.5,caller ... show caller based call chains with value >0.5
 ```
 
-## Useful `perf` events
-
 ```markdown
-useful <ev>:
+Useful <ev>:
   page-faults
   minor-faults
   major-faults
   cpu-cycles`
   task-clock
- ```
+```
 
 ## [`Flamegraph`](https://github.com/brendangregg/FlameGraph)
 
+### Flamegraph with single event trace
 ```markdown
-# flamegraph for single event trace
-perf record -g -p <pid> -e cpu-cycles
+perf record -g -e cpu-cycles -p <pid>
 perf script | FlameGraph/stackcollapse-perf.pl | FlameGraph/flamegraph.pl > cycles-flamegraph.svg
+```
 
-# flamegraphs for multiple events trace
-perf record -g -p <pid> -e cpu-cycles,page-faults
+### Flamegraph with multiple event traces
+```markdown
+perf record -g -e cpu-cycles,page-faults -p <pid>
 perf script --per-event-dump
 # fold & generate as above
 ```
-- 
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