bpftrace MCP Server

#!/usr/bin/env bpftrace /* * loads Prints load averages. * For Linux, uses bpftrace and eBPF. * * These are the same load averages printed by "uptime", but to three decimal * places instead of two (not that it really matters). This is really a * demonstration of fetching and processing a kernel structure from bpftrace. * * USAGE: loads.bt * * This is a bpftrace version of a DTraceToolkit tool. * * Copyright 2018 Netflix, Inc. * Licensed under the Apache License, Version 2.0 (the "License") * * 10-Sep-2018 Brendan Gregg Created this. */ BEGIN { printf("Reading load averages... Hit Ctrl-C to end.\n"); } interval:s:1 { /* * See fs/proc/loadavg.c and include/linux/sched/loadavg.h for the * following calculations. */ $avenrun = kaddr("avenrun"); $load1 = *$avenrun; $load5 = *($avenrun + 8); $load15 = *($avenrun + 16); time("%H:%M:%S "); printf("load averages: %d.%03d %d.%03d %d.%03d\n", ($load1 >> 11), (($load1 & ((1 << 11) - 1)) * 1000) >> 11, ($load5 >> 11), (($load5 & ((1 << 11) - 1)) * 1000) >> 11, ($load15 >> 11), (($load15 & ((1 << 11) - 1)) * 1000) >> 11 ); }