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: Doug Smythies <dsmythies@telus.net> Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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@ -411,6 +411,16 @@ def set_trace_buffer_size():
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print('IO error setting trace buffer size ')
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quit()
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def free_trace_buffer():
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""" Free the trace buffer memory """
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try:
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open('/sys/kernel/debug/tracing/buffer_size_kb'
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, 'w').write("1")
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except:
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print('IO error setting trace buffer size ')
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quit()
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def read_trace_data(filename):
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""" Read and parse trace data """
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@ -583,4 +593,9 @@ for root, dirs, files in os.walk('.'):
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for f in files:
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fix_ownership(f)
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clear_trace_file()
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# Free the memory
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if interval:
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free_trace_buffer()
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os.chdir('../../')
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