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42 lines
1.3 KiB
42 lines
1.3 KiB
4 months ago
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#!/usr/bin/env python
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# Copyright (c) PLUMgrid, Inc.
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# Licensed under the Apache License, Version 2.0 (the "License")
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from ctypes import c_uint, c_ulong, Structure
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from bcc import BPF
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from time import sleep
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import sys
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from unittest import main, TestCase
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arg1 = sys.argv.pop(1)
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arg2 = ""
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if len(sys.argv) > 1:
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arg2 = sys.argv.pop(1)
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class TestBlkRequest(TestCase):
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def setUp(self):
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b = BPF(arg1, arg2, debug=0)
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self.latency = b.get_table("latency", c_uint, c_ulong)
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b.attach_kprobe(event="blk_start_request",
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fn_name="probe_blk_start_request")
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b.attach_kprobe(event="blk_update_request",
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fn_name="probe_blk_update_request")
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def test_blk1(self):
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import subprocess
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import os
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# use /opt instead of /tmp so that it hits a real disk
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for i in range(0, 2):
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subprocess.call(["dd", "if=/dev/zero", "of=/opt/trace3.txt",
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"count=1024", "bs=4096"])
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subprocess.call(["sync"])
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os.unlink("/opt/trace3.txt")
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for key, leaf in self.latency.items():
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print("latency %u:" % key.value, "count %u" % leaf.value)
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sys.stdout.flush()
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self.assertEqual(len(list(self.latency.keys())), len(self.latency))
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if __name__ == "__main__":
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main()
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