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29 lines
875 B
29 lines
875 B
AUTHOR = "David Sharp <dhsharp@google.com>"
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NAME = "Tracing microbenchmark"
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TIME = "SHORT"
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TEST_CATEGORY = "Benchmark"
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TEST_CLASS = "Kernel"
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TEST_TYPE = "client"
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DOC = """
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A simple benchmark of kernel tracers such as ftrace. Enables tracepoints in
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sys_getuid and makes 100,000 calls to getuid with tracing on and off to measure
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the overhead of enabling tracing. The intent for this benchmark is to not
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overflow the ring buffer, so the buffer is generously sized.
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tracer: tracepoint enabled
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------
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off: n/a
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ftrace: syscalls:sys_enter_getuid
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Args:
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tracer: see table above.
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buffer_size_kb: Set the tracing ring buffer to this size (per-cpu).
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calls: Set the number of calls to make to getuid.
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"""
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job.run_test('tracing_microbenchmark', tracer='off', tag='off', iterations=10)
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job.run_test('tracing_microbenchmark', tracer='ftrace', tag='ftrace', iterations=10)
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