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authorRoss Zwisler <zwisler@chromium.org>2023-01-30 21:19:11 +0300
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2023-02-02 17:45:35 +0300
commitcf3e0251868c56b10ccb3e0b3628fcfb0c9c4ec5 (patch)
tree901893cb98de347b8432efcf307a4124211135a3 /tools/power
parent6d796c50f84ca79f1722bb131799e5a5710c4700 (diff)
downloadlinux-cf3e0251868c56b10ccb3e0b3628fcfb0c9c4ec5.tar.xz
PM: tools: use canonical ftrace path
The canonical location for the tracefs filesystem is at /sys/kernel/tracing. But, from Documentation/trace/ftrace.rst: Before 4.1, all ftrace tracing control files were within the debugfs file system, which is typically located at /sys/kernel/debug/tracing. For backward compatibility, when mounting the debugfs file system, the tracefs file system will be automatically mounted at: /sys/kernel/debug/tracing A few scripts in tools/power still refer to this older debugfs path, so let's update them to avoid confusion. Signed-off-by: Ross Zwisler <zwisler@google.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'tools/power')
-rwxr-xr-xtools/power/pm-graph/sleepgraph.py4
-rwxr-xr-xtools/power/x86/amd_pstate_tracer/amd_pstate_trace.py4
-rwxr-xr-xtools/power/x86/intel_pstate_tracer/intel_pstate_tracer.py10
3 files changed, 9 insertions, 9 deletions
diff --git a/tools/power/pm-graph/sleepgraph.py b/tools/power/pm-graph/sleepgraph.py
index c60c90f35d18..82c09cd25cc2 100755
--- a/tools/power/pm-graph/sleepgraph.py
+++ b/tools/power/pm-graph/sleepgraph.py
@@ -120,9 +120,9 @@ class SystemValues:
cgexp = False
testdir = ''
outdir = ''
- tpath = '/sys/kernel/debug/tracing/'
+ tpath = '/sys/kernel/tracing/'
fpdtpath = '/sys/firmware/acpi/tables/FPDT'
- epath = '/sys/kernel/debug/tracing/events/power/'
+ epath = '/sys/kernel/tracing/events/power/'
pmdpath = '/sys/power/pm_debug_messages'
s0ixpath = '/sys/module/intel_pmc_core/parameters/warn_on_s0ix_failures'
s0ixres = '/sys/devices/system/cpu/cpuidle/low_power_idle_system_residency_us'
diff --git a/tools/power/x86/amd_pstate_tracer/amd_pstate_trace.py b/tools/power/x86/amd_pstate_tracer/amd_pstate_trace.py
index 2dea4032ac56..904df0ea0a1e 100755
--- a/tools/power/x86/amd_pstate_tracer/amd_pstate_trace.py
+++ b/tools/power/x86/amd_pstate_tracer/amd_pstate_trace.py
@@ -248,7 +248,7 @@ def signal_handler(signal, frame):
ipt.free_trace_buffer()
sys.exit(0)
-trace_file = "/sys/kernel/debug/tracing/events/amd_cpu/enable"
+trace_file = "/sys/kernel/tracing/events/amd_cpu/enable"
signal.signal(signal.SIGINT, signal_handler)
interval = ""
@@ -319,7 +319,7 @@ print(cur_version)
cleanup_data_files()
if interval:
- file_name = "/sys/kernel/debug/tracing/trace"
+ file_name = "/sys/kernel/tracing/trace"
ipt.clear_trace_file()
ipt.set_trace_buffer_size(memory)
ipt.enable_trace(trace_file)
diff --git a/tools/power/x86/intel_pstate_tracer/intel_pstate_tracer.py b/tools/power/x86/intel_pstate_tracer/intel_pstate_tracer.py
index b46e9eb8f5aa..ec3323100e1a 100755
--- a/tools/power/x86/intel_pstate_tracer/intel_pstate_tracer.py
+++ b/tools/power/x86/intel_pstate_tracer/intel_pstate_tracer.py
@@ -373,7 +373,7 @@ def clear_trace_file():
""" Clear trace file """
try:
- f_handle = open('/sys/kernel/debug/tracing/trace', 'w')
+ f_handle = open('/sys/kernel/tracing/trace', 'w')
f_handle.close()
except:
print('IO error clearing trace file ')
@@ -401,7 +401,7 @@ def set_trace_buffer_size(memory):
""" Set trace buffer size """
try:
- with open('/sys/kernel/debug/tracing/buffer_size_kb', 'w') as fp:
+ with open('/sys/kernel/tracing/buffer_size_kb', 'w') as fp:
fp.write(memory)
except:
print('IO error setting trace buffer size ')
@@ -411,7 +411,7 @@ def free_trace_buffer():
""" Free the trace buffer memory """
try:
- open('/sys/kernel/debug/tracing/buffer_size_kb'
+ open('/sys/kernel/tracing/buffer_size_kb'
, 'w').write("1")
except:
print('IO error freeing trace buffer ')
@@ -495,7 +495,7 @@ def signal_handler(signal, frame):
sys.exit(0)
if __name__ == "__main__":
- trace_file = "/sys/kernel/debug/tracing/events/power/pstate_sample/enable"
+ trace_file = "/sys/kernel/tracing/events/power/pstate_sample/enable"
signal.signal(signal.SIGINT, signal_handler)
interval = ""
@@ -569,7 +569,7 @@ if __name__ == "__main__":
cleanup_data_files()
if interval:
- filename = "/sys/kernel/debug/tracing/trace"
+ filename = "/sys/kernel/tracing/trace"
clear_trace_file()
set_trace_buffer_size(memory)
enable_trace(trace_file)