linux-kernel - [PATCH v3 3/4] pm:cpupower: Include test_raw

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Message-ID: <20240905021916.15938-4-jwyatt@redhat.com>
Date: Wed,  4 Sep 2024 22:19:10 -0400
From: "John B. Wyatt IV" <jwyatt@...hat.com>
To: Shuah Khan <skhan@...uxfoundation.org>
Cc: "John B. Wyatt IV" <jwyatt@...hat.com>,
	linux-pm@...r.kernel.org,
	Thomas Renninger <trenn@...e.com>,
	Shuah Khan <shuah@...nel.org>,
	"Rafael J. Wysocki" <rafael@...nel.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	linux-kernel@...r.kernel.org,
	John Kacur <jkacur@...hat.com>,
	Tomas Glozar <tglozar@...hat.com>,
	Arnaldo Melo <acme@...hat.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	"John B. Wyatt IV" <sageofredondo@...il.com>
Subject: [PATCH v3 3/4] pm:cpupower: Include test_raw_pylibcpupower.py

This script demonstrates how to make use of, and tests, the bindings.

In the future, this script could become part of a larger test suite to
test the bindings and libcpupower.

Signed-off-by: John B. Wyatt IV <jwyatt@...hat.com>
Signed-off-by: John B. Wyatt IV <sageofredondo@...il.com>
---

Changes in v3:
	- Small puncations below fixed.
	- Reordered patch series for cpupower stub implementation to be
	  first.
	- Added pm:cpupower prefix to header and Rafael to Cc.

Changes in v2:
	- None.
---
 .../bindings/python/test_raw_pylibcpupower.py | 42 +++++++++++++++++++
 1 file changed, 42 insertions(+)
 create mode 100755 tools/power/cpupower/bindings/python/test_raw_pylibcpupower.py

diff --git a/tools/power/cpupower/bindings/python/test_raw_pylibcpupower.py b/tools/power/cpupower/bindings/python/test_raw_pylibcpupower.py
new file mode 100755
index 000000000000..3d6f62b9556a
--- /dev/null
+++ b/tools/power/cpupower/bindings/python/test_raw_pylibcpupower.py
@@ -0,0 +1,42 @@
+#!/usr/bin/env python3
+# SPDX-License-Identifier: GPL-2.0-only
+
+import raw_pylibcpupower as p
+
+# Simple function call
+
+"""
+Get cstate count
+"""
+cpu_cstates_count = p.cpuidle_state_count(0)
+if cpu_cstates_count > -1:
+    print(f"CPU 0 has {cpu_cstates_count} c-states")
+else:
+    print(f"cstate count error: return code: {cpu_cstates_count}")
+
+"""
+Disable cstate (will fail if the above is 0, ex: a virtual machine)
+"""
+cstate_disabled = p.cpuidle_state_disable(0, 0, 1)
+if cpu_cstates_count == 0:
+    print(f"CPU 0 has {cpu_cstates_count} c-states")
+else:
+    print(f"cstate count error: return code: {cpu_cstates_count}")
+
+match cstate_disabled:
+    case 0:
+        print(f"CPU state disabled")
+    case -1:
+        print(f"Idlestate not available")
+    case _:
+        print(f"Not documented")
+
+
+# Pointer example
+
+topo = p.cpupower_topology()
+total_cpus = p.get_cpu_topology(topo)
+if total_cpus > 0:
+    print(f"Number of total cpus: {total_cpus} and number of cores: {topo.cores}")
+else:
+    print(f"Error: could not get cpu topology")
-- 
2.46.0