mirror of
https://github.com/varun-r-mallya/Python-BPF.git
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103 lines
2.4 KiB
Plaintext
103 lines
2.4 KiB
Plaintext
{
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"cells": [
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{
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"cell_type": "code",
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"execution_count": null,
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"id": "bfe01ceb-2f27-41b3-b3ba-50ec65cfddda",
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"metadata": {},
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"outputs": [],
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"source": [
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"from pythonbpf import bpf, map, section, bpfglobal, BPF, trace_fields\n",
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"from pythonbpf.helper import ktime\n",
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"from pythonbpf.maps import HashMap\n",
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"\n",
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"from ctypes import c_void_p, c_int64"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"id": "ddb115f4-20a7-43bc-bb5b-ccbfd6031fc2",
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"metadata": {},
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"outputs": [],
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"source": [
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"@bpf\n",
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"@map\n",
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"def last() -> HashMap:\n",
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" return HashMap(key=c_int64, value=c_int64, max_entries=1)\n",
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"\n",
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"\n",
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"@bpf\n",
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"@section(\"tracepoint/syscalls/sys_enter_sync\")\n",
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"def do_trace(ctx: c_void_p) -> c_int64:\n",
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" key = 0\n",
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" tsp = last.lookup(key)\n",
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" if tsp:\n",
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" delta = ktime() - tsp\n",
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" if delta < 1000000000:\n",
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" time_ms = delta // 1000000\n",
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" print(f\"{time_ms}\")\n",
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" last.delete(key)\n",
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" else:\n",
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" last.update(key, ktime())\n",
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" return 0\n",
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"\n",
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"\n",
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"@bpf\n",
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"@bpfglobal\n",
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"def LICENSE() -> str:\n",
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" return \"GPL\"\n",
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"\n",
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"\n",
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"# Compile and load\n",
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"b = BPF()\n",
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"b.load()\n",
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"b.attach_all()"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"id": "e4f46574-9fd8-46e7-9c7b-27a36d07f200",
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"metadata": {},
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"outputs": [],
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"source": [
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"print(\"Tracing for quick sync's... Ctrl-C to end\")\n",
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"\n",
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"# format output\n",
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"start = 0\n",
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"while True:\n",
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" try:\n",
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" task, pid, cpu, flags, ts, ms = trace_fields()\n",
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" if start == 0:\n",
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" start = ts\n",
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" ts -= start\n",
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" print(f\"At time {ts} s: Multiple syncs detected, last {ms} ms ago\")\n",
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" except KeyboardInterrupt:\n",
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" exit()"
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]
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}
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],
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"metadata": {
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"kernelspec": {
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"display_name": "Python 3 (ipykernel)",
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"language": "python",
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"name": "python3"
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},
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"language_info": {
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"codemirror_mode": {
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"name": "ipython",
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"version": 3
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},
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"file_extension": ".py",
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"mimetype": "text/x-python",
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"name": "python",
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"nbconvert_exporter": "python",
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"pygments_lexer": "ipython3",
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"version": "3.13.3"
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}
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},
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"nbformat": 4,
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"nbformat_minor": 5
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}
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