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PM: tools: use canonical ftrace path

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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>
This commit is contained in:
Ross Zwisler 2023-01-30 11:19:11 -07:00 committed by Rafael J. Wysocki
parent 6d796c50f8
commit cf3e025186
3 changed files with 9 additions and 9 deletions
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4
tools/power/pm-graph/sleepgraph.py
View File

@ -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'

4
tools/power/x86/amd_pstate_tracer/amd_pstate_trace.py
View File

@ -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)

10
tools/power/x86/intel_pstate_tracer/intel_pstate_tracer.py
View File

@ -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)