From: claudio <claudio@openbsd.org>
Date: Fri, 12 May 2023 14:34:00 +0000 (+0000)
Subject: Add example user profile btrace script.
X-Git-Url: http://artulab.com/gitweb/?a=commitdiff_plain;h=9dd2df6aa8c1e6f5e9bf7dbaa8de656a22936b38;p=openbsd

Add example user profile btrace script.
With and OK mpi@
---

diff --git a/share/btrace/Makefile b/share/btrace/Makefile
index 900b5f69570..acca2897a58 100644
--- a/share/btrace/Makefile
+++ b/share/btrace/Makefile
@@ -1,6 +1,6 @@
-#	$OpenBSD: Makefile,v 1.1 2021/10/23 19:37:35 mpi Exp $
+#	$OpenBSD: Makefile,v 1.2 2023/05/12 14:34:00 claudio Exp $
 
-FILES=	kprofile.bt runqlat.bt
+FILES=	kprofile.bt runqlat.bt uprofile.bt
 NOOBJ=	noobj
 
 install:
diff --git a/share/btrace/uprofile.bt b/share/btrace/uprofile.bt
new file mode 100644
index 00000000000..17ce622ee96
--- /dev/null
+++ b/share/btrace/uprofile.bt
@@ -0,0 +1,17 @@
+/*	$OpenBSD: uprofile.bt,v 1.1 2023/05/12 14:34:00 claudio Exp $	*/
+
+/*
+ * uprofile.bt	Userland profiling (stack sampling) at 100Hz.
+ *
+ * To produce a FlameGraph process the output with stackcollapse-bpftrace.pl
+ * and flamegraph.pl found in:
+ *	https://github.com/brendangregg/FlameGraph
+ *
+ * The PID of the to be monitored process is the first optional argument to
+ * btrace(8).
+ * This only works for a single static binary where everything was compiled
+ * with -fno-omit-frame-pointer.
+ */
+profile:hz:100 / pid == $1 / {
+	@[ustack] = count();
+}