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41 lines
1.1 KiB
41 lines
1.1 KiB
#!/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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text = """
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#include <linux/ptrace.h>
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struct Ptr { u64 ptr; };
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struct Counters { char unused; __int128 stat1; };
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BPF_HASH(stats, struct Ptr, struct Counters, 1024);
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int count_sched(struct pt_regs *ctx) {
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struct Ptr key = {.ptr=PT_REGS_PARM1(ctx)};
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struct Counters zleaf;
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memset(&zleaf, 0, sizeof(zleaf));
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stats.lookup_or_init(&key, &zleaf)->stat1++;
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return 0;
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}
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"""
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class TestTracingEvent(TestCase):
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def setUp(self):
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b = BPF(text=text, debug=0)
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self.stats = b.get_table("stats")
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b.attach_kprobe(event="finish_task_switch", fn_name="count_sched")
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def test_sched1(self):
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for i in range(0, 100):
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sleep(0.01)
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for key, leaf in self.stats.items():
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print("ptr %x:" % key.ptr, "stat1 (%d %d)" % (leaf.stat1[1], leaf.stat1[0]))
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if __name__ == "__main__":
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main()
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