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35 lines
727 B
Python
35 lines
727 B
Python
from pythonbpf import bpf, map, section, bpfglobal, compile
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from pythonbpf.helpers import ktime
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from pythonbpf.maps import HashMap
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from ctypes import c_void_p, c_int64, c_uint64
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@bpf
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@map
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def last() -> HashMap:
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return HashMap(key_type=c_uint64, value_type=c_uint64, max_entries=3)
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@bpf
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@section("tracepoint/syscalls/sys_sync")
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def do_trace(ctx: c_void_p) -> c_int64:
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key = 0
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tsp = last().lookup(key)
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if tsp:
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delta = (ktime() - tsp)
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if delta < 1000000000:
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time_ms = (delta // 1000000)
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print(f"sync called within last second, last {time_ms} ms ago")
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last().delete(key)
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return c_int64(0)
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@bpf
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@bpfglobal
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def LICENSE() -> str:
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return "GPL"
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compile()
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