47 lines
1.4 KiB
Python
47 lines
1.4 KiB
Python
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import os
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from autotest_lib.client.bin import test, utils
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class linus_stress(test.test):
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version = 1
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def setup(self):
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os.mkdir(self.srcdir)
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os.chdir(self.bindir)
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utils.system('cp linus_stress.c src/')
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os.chdir(self.srcdir)
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utils.system(utils.get_cc() + ' linus_stress.c -D_POSIX_C_SOURCE=200112 -o linus_stress')
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def initialize(self):
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self.job.require_gcc()
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def run_the_test(self, iterations):
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utils.write_one_line('/proc/sys/vm/dirty_ratio', '4')
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utils.write_one_line('/proc/sys/vm/dirty_background_ratio', '2')
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cmd = os.path.join(self.srcdir, 'linus_stress')
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args = "%d" % (utils.memtotal() / 32)
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profilers = self.job.profilers
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if profilers.present():
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profilers.start(self)
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for i in range(iterations):
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utils.system(cmd + ' ' + args)
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if profilers.present():
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profilers.stop(self)
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profilers.report(self)
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def execute(self, iterations = 1):
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dirty_ratio = utils.read_one_line('/proc/sys/vm/dirty_ratio')
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dirty_background_ratio = utils.read_one_line('/proc/sys/vm/dirty_background_ratio')
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try:
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self.run_the_test(iterations)
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finally:
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utils.write_one_line('/proc/sys/vm/dirty_ratio', dirty_ratio)
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utils.write_one_line('/proc/sys/vm/dirty_background_ratio', dirty_background_ratio)
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