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Message-ID: <20240827062438.71809-4-jwyatt@redhat.com>
Date: Tue, 27 Aug 2024 02:24:35 -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>,
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 v2 3/4] 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 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
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