linux-kernel - [PATCH 16/30] tools/sched_ext: Add scx_show

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20240618212056.2833381-17-tj@kernel.org>
Date: Tue, 18 Jun 2024 11:17:31 -1000
From: Tejun Heo <tj@...nel.org>
To: torvalds@...ux-foundation.org,
	mingo@...hat.com,
	peterz@...radead.org,
	juri.lelli@...hat.com,
	vincent.guittot@...aro.org,
	dietmar.eggemann@....com,
	rostedt@...dmis.org,
	bsegall@...gle.com,
	mgorman@...e.de,
	bristot@...hat.com,
	vschneid@...hat.com,
	ast@...nel.org,
	daniel@...earbox.net,
	andrii@...nel.org,
	martin.lau@...nel.org,
	joshdon@...gle.com,
	brho@...gle.com,
	pjt@...gle.com,
	derkling@...gle.com,
	haoluo@...gle.com,
	dvernet@...a.com,
	dschatzberg@...a.com,
	dskarlat@...cmu.edu,
	riel@...riel.com,
	changwoo@...lia.com,
	himadrics@...ia.fr,
	memxor@...il.com,
	andrea.righi@...onical.com,
	joel@...lfernandes.org
Cc: linux-kernel@...r.kernel.org,
	bpf@...r.kernel.org,
	kernel-team@...a.com,
	Tejun Heo <tj@...nel.org>
Subject: [PATCH 16/30] tools/sched_ext: Add scx_show_state.py

There are states which are interesting but don't quite fit the interface
exposed under /sys/kernel/sched_ext. Add tools/scx_show_state.py to show
them.

Signed-off-by: Tejun Heo <tj@...nel.org>
Reviewed-by: David Vernet <dvernet@...a.com>
---
 tools/sched_ext/scx_show_state.py | 39 +++++++++++++++++++++++++++++++
 1 file changed, 39 insertions(+)
 create mode 100644 tools/sched_ext/scx_show_state.py

diff --git a/tools/sched_ext/scx_show_state.py b/tools/sched_ext/scx_show_state.py
new file mode 100644
index 000000000000..d457d2a74e1e
--- /dev/null
+++ b/tools/sched_ext/scx_show_state.py
@@ -0,0 +1,39 @@
+#!/usr/bin/env drgn
+#
+# Copyright (C) 2024 Tejun Heo <tj@...nel.org>
+# Copyright (C) 2024 Meta Platforms, Inc. and affiliates.
+
+desc = """
+This is a drgn script to show the current sched_ext state.
+For more info on drgn, visit https://github.com/osandov/drgn.
+"""
+
+import drgn
+import sys
+
+def err(s):
+    print(s, file=sys.stderr, flush=True)
+    sys.exit(1)
+
+def read_int(name):
+    return int(prog[name].value_())
+
+def read_atomic(name):
+    return prog[name].counter.value_()
+
+def read_static_key(name):
+    return prog[name].key.enabled.counter.value_()
+
+def ops_state_str(state):
+    return prog['scx_ops_enable_state_str'][state].string_().decode()
+
+ops = prog['scx_ops']
+enable_state = read_atomic("scx_ops_enable_state_var")
+
+print(f'ops           : {ops.name.string_().decode()}')
+print(f'enabled       : {read_static_key("__scx_ops_enabled")}')
+print(f'switching_all : {read_int("scx_switching_all")}')
+print(f'switched_all  : {read_static_key("__scx_switched_all")}')
+print(f'enable_state  : {ops_state_str(enable_state)} ({enable_state})')
+print(f'bypass_depth  : {read_atomic("scx_ops_bypass_depth")}')
+print(f'nr_rejected   : {read_atomic("scx_nr_rejected")}')
-- 
2.45.2