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forked fromtorvalds/linux

Commitfbe3138

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Doug Smythiesrafaeljw
Doug Smythies
authored andcommitted
tools/power/x86/intel_pstate_tracer: Free the trace buffer memory
The trace buffer memory should be, mostly, freed afterthe buffer has been output.This patch is required before a future patch that will allowthe user to override the default, and specify the trace buffermemory 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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‎tools/power/x86/intel_pstate_tracer/intel_pstate_tracer.py‎

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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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deffree_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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defread_trace_data(filename):
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""" Read and parse trace data """
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@@ -583,4 +593,9 @@ def read_trace_data(filename):
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forfinfiles:
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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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ifinterval:
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free_trace_buffer()
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os.chdir('../../')

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