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Add Python notebook examples for current BCC examples
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8 files changed

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‎BCC-Examples/hello_fields.ipynb‎

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{
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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": "28cf2e27-41e2-461c-a39c-147417141a4e",
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"metadata": {},
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"outputs": [],
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"source": [
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"from pythonbpf import bpf, section, bpfglobal, BPF, trace_fields\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": "133190e5-5a99-4585-b6e1-91224ed973c2",
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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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"@section(\"tracepoint/syscalls/sys_enter_clone\")\n",
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"def hello_world(ctx: c_void_p) -> c_int64:\n",
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" print(\"Hello, World!\")\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": "d3934efb-4043-4545-ae4c-c50ec40a24fd",
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"metadata": {},
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"outputs": [],
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"source": [
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"# header\n",
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"print(f\"{'TIME(s)':<18} {'COMM':<16} {'PID':<6} {'MESSAGE'}\")\n",
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"\n",
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"# format output\n",
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"while True:\n",
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" try:\n",
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" (task, pid, cpu, flags, ts, msg) = trace_fields()\n",
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" except ValueError:\n",
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" continue\n",
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" except KeyboardInterrupt:\n",
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" exit()\n",
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" print(f\"{ts:<18} {task:<16} {pid:<6} {msg}\")"
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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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}

‎BCC-Examples/hello_perf_output.ipynb‎

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{
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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": "79b74928-f4b4-4320-96e3-d973997de2f4",
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"metadata": {},
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"outputs": [],
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"source": [
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"from pythonbpf import bpf, map, struct, section, bpfglobal, BPF\n",
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"from pythonbpf.helper import ktime, pid, comm\n",
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"from pythonbpf.maps import PerfEventArray\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": "5bdb0329-ae2d-45e8-808e-5ed5b1374204",
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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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"@struct\n",
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"class data_t:\n",
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" pid: c_int64\n",
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" ts: c_int64\n",
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" comm: str(16)\n",
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"\n",
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"\n",
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"@bpf\n",
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"@map\n",
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"def events() -> PerfEventArray:\n",
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" return PerfEventArray(key_size=c_int64, value_size=c_int64)\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_clone\")\n",
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"def hello(ctx: c_void_p) -> c_int64:\n",
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" dataobj = data_t()\n",
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" dataobj.pid, dataobj.ts = pid(), ktime()\n",
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" comm(dataobj.comm)\n",
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" events.output(dataobj)\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": "4bcc7d57-6cc4-48a3-bbd2-42ad6263afdf",
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"metadata": {},
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"outputs": [],
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"source": [
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"start = 0\n",
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"\n",
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"\n",
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"def callback(cpu, event):\n",
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" global start\n",
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" if start == 0:\n",
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" start = event.ts\n",
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" ts = (event.ts - start) / 1e9\n",
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" print(f\"[CPU {cpu}] PID: {event.pid}, TS: {ts}, COMM: {event.comm.decode()}\")\n",
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"\n",
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"\n",
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"perf = b[\"events\"].open_perf_buffer(callback, struct_name=\"data_t\")\n",
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"print(\"Starting to poll... (Ctrl+C to stop)\")\n",
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"print(\"Try running: fork() or clone() system calls to trigger events\")\n",
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"\n",
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"try:\n",
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" while True:\n",
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" b[\"events\"].poll(1000)\n",
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"except KeyboardInterrupt:\n",
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" print(\"Stopping...\")"
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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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}

‎BCC-Examples/sync_count.ipynb‎

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{
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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": "dcab010c-f5e9-446f-9f9f-056cc794ad14",
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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": "720797e8-9c81-4af6-a385-80f1ec4c0f15",
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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=2)\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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" ts_key, cnt_key = 0, 1\n",
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" tsp, cntp = last.lookup(ts_key), last.lookup(cnt_key)\n",
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" if not cntp:\n",
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" last.update(cnt_key, 0)\n",
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" cntp = last.lookup(cnt_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} {cntp}\")\n",
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" last.delete(ts_key)\n",
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" else:\n",
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" last.update(ts_key, ktime())\n",
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" last.update(cnt_key, cntp + 1)\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": "78a8b82c-7c5f-43c1-9de1-cd982a0f345b",
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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, msg = 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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" ms, cnt = msg.split()\n",
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" print(f\"At time {ts} s: Multiple syncs detected, last {ms} ms ago. Count {cnt}\")\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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