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Commit fbe31388 authored by Doug Smythies's avatar Doug Smythies Committed by Rafael J. Wysocki
Browse files

tools/power/x86/intel_pstate_tracer: Free the trace buffer memory 



The trace buffer memory should be, mostly, freed after
the buffer has been output.

This patch is required before a future patch that will allow
the user to override the default, and specify the trace buffer
memory allocation as a command line option.

Signed-off-by: default avatarDoug Smythies <dsmythies@telus.net>
Acked-by: default avatarSrinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent cc85a6e2

tools/power/x86/intel_pstate_tracer/intel_pstate_tracer.py

+15 −0
Original line number Diff line number Diff line
@@ -411,6 +411,16 @@ def set_trace_buffer_size(): 
        print('IO error setting trace buffer size ')

        quit()



def free_trace_buffer():

    """ Free the trace buffer memory """



    try:

       open('/sys/kernel/debug/tracing/buffer_size_kb'

                 , 'w').write("1")

    except:

        print('IO error setting trace buffer size ')

        quit()



def read_trace_data(filename):

    """ Read and parse trace data """
@@ -583,4 +593,9 @@ for root, dirs, files in os.walk('.'): 
    for f in files:

        fix_ownership(f)



clear_trace_file()

# Free the memory

if interval:

    free_trace_buffer()



os.chdir('../../')