From 364b1580accf607d8edacbe15376ef785b5b4d9a Mon Sep 17 00:00:00 2001
From: Johannes Stoelp <johannes.stoelp@gmail.com>
Date: Sat, 13 Nov 2021 23:00:09 +0100
Subject: strace: add useful flags + update examples

---
 src/trace_profile/strace.md | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

(limited to 'src/trace_profile/strace.md')

diff --git a/src/trace_profile/strace.md b/src/trace_profile/strace.md
index c610df3..ce77d17 100644
--- a/src/trace_profile/strace.md
+++ b/src/trace_profile/strace.md
@@ -9,6 +9,10 @@ strace [opts] [prg]
   -o <file> ... log output into <file>
   -c .......... dump syscall statitics at the end
   -k .......... dump stack trace for each syscall
+  -P <path> ... only trace syscall accesing path
+  -y .......... print paths for FDs
+  -tt ......... print absolute timestamp (with us precision)
+  -r .......... print relative timestamp
 ```
 
 ```markdown
@@ -29,5 +33,5 @@ strace -f -e trace=open,socket -p <pid>
 
 Trace signals delivered to a running process:
 ```markdown
-strace -f -e signal -p <pid>
+strace -e signal -e 'trace=!all' -p <pid>
 ```
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