Let's document: iovisor/bcc

I found a large list (98) of incredible system monitoring tools for Linux: https://github.com/iovisor/bcc

Every single one of them is written in Python, so argdist.py is the executable (except read-trace which only has a .sh file and netqtop which as a .c file in addition to the .py file).

• argdist — Display function parameter values as a histogram or frequency count — examples
• bashreadline — Print entered bash commands system wide — examples
• bindsnoop — Trace IPv4 and IPv6 bind() system calls (bind()) — examples
• biolatency — Summarize block device I/O latency as a histogram — examples
• biotop — Top for disks: Summarize block device I/O by process — examples
• biosnoop — Trace block device I/O with PID and latency — examples
• bitesize — Show per process I/O size histogram — examples
• bpflist — Display processes with active BPF programs and maps — examples
• btrfsdist — Summarize btrfs operation latency distribution as a histogram — examples
• btrfsslower — Trace slow btrfs operations — examples
• capable — Trace security capability checks — examples
• cachestat — Trace page cache hit/miss ratio — examples
• cachetop — Trace page cache hit/miss ratio by processes — examples
• compactsnoop — Trace compact zone events with PID and latency — examples
• cpudist — Summarize on- and off-CPU time per task as a histogram — examples
• cpuunclaimed — Sample CPU run queues and calculate unclaimed idle CPU — examples
• criticalstat — Trace and report long atomic critical sections in the kernel — examples
• dbslower — Trace MySQL/PostgreSQL queries slower than a threshold — examples
• dbstat — Summarize MySQL/PostgreSQL query latency as a histogram — examples
• dcsnoop — Trace directory entry cache (dcache) lookups — examples
• dcstat — Directory entry cache (dcache) stats — examples
• deadlock — Detect potential deadlocks on a running process — examples
• dirtop — File reads and writes by directory. Top for directories — examples
• drsnoop — Trace direct reclaim events with PID and latency — examples
• execsnoop — Trace new processes via exec() syscalls — examples
• exitsnoop — Trace process termination (exit and fatal signals) — examples
• ext4dist — Summarize ext4 operation latency distribution as a histogram — examples
• ext4slower — Trace slow ext4 operations — examples
• filelife — Trace the lifespan of short-lived files — examples
• fileslower — Trace slow synchronous file reads and writes — examples
• filetop — File reads and writes by filename and process. Top for files — examples
• funccount — Count kernel function calls — examples
• funcinterval — Time interval between the same function as a histogram — examples
• funclatency — Time functions and show their latency distribution — examples
• funcslower — Trace slow kernel or user function calls — examples
• gethostlatency — Show latency for getaddrinfo/gethostbyname[2] calls — examples
• hardirqs — Measure hard IRQ (hard interrupt) event time — examples
• inject — Targeted error injection with call chain and predicate — examples
• killsnoop — Trace signals issued by the kill() syscall — examples
• klockstat — Traces kernel mutex lock events and display locks statistics — examples
• llcstat — Summarize CPU cache references and misses by process — examples
• mdflush — Trace md flush events — examples
• memleak — Display outstanding memory allocations to find memory leaks — examples
• mountsnoop — Trace mount and umount syscalls system-wide — examples
• mysqld_qslower — Trace MySQL server queries slower than a threshold — examples
• netqtop — Trace and display packets distribution on NIC queues — examples
• nfsslower — Trace slow NFS operations — examples
• nfsdist — Summarize NFS operation latency distribution as a histogram — examples
• offcputime — Summarize off-CPU time by kernel stack trace — examples
• offwaketime — Summarize blocked time by kernel off-CPU stack and waker stack — examples
• oomkill — Trace the out-of-memory (OOM) killer — examples
• opensnoop → #1576 — Trace open() syscalls — examples
• pidpersec — Count new processes (via fork) — examples
• profile — Profile CPU usage by sampling stack traces at a timed interval — examples
• readahead — Show performance of read-ahead cach — examples
• reset-trace.sh: Reset the state of tracing. Maintenance tool only — examples
• runqlat — Run queue (scheduler) latency as a histogram — examples
• runqlen — Run queue length as a histogram — examples
• runqslower — Trace long process scheduling delays — examples
• shmsnoop — Trace System V shared memory syscalls — examples
• sofdsnoop — Trace FDs passed through unix sockets — examples
• slabratetop — Kernel SLAB/SLUB memory cache allocation rate top — examples
• softirqs — Measure soft IRQ (soft interrupt) event time — examples
• solisten — Trace TCP socket listen — examples
• sslsniff — Sniff OpenSSL written and readed data — examples
• stackcount — Count kernel function calls and their stack traces — examples
• syncsnoop — Trace sync() syscall — examples
• syscount — Summarize syscall counts and latencies — examples
• tcpaccept — Trace TCP passive connections (accept()) — examples
• tcpconnect — Trace TCP active connections (connect()) — examples
• tcpconnlat — Trace TCP active connection latency (connect()) — examples
• tcpdrop — Trace kernel-based TCP packet drops with details — examples
• tcplife — Trace TCP sessions and summarize lifespan — examples
• tcpretrans — Trace TCP retransmits and TLPs — examples
• tcprtt — Trace TCP round trip time — examples
• tcpstates — Trace TCP session state changes with durations — examples
• tcpsubnet — Summarize and aggregate TCP send by subnet — examples
• tcpsynbl — Show TCP SYN backlog — examples
• tcptop — Summarize TCP send/recv throughput by host. Top for TCP — examples
• tcptracer — Trace TCP established connections (connect(), accept(), close()) — examples
• threadsnoop — List new thread creation — examples
• tplist — Display kernel tracepoints or USDT probes and their formats — examples
• trace — Trace arbitrary functions, with filters — examples
• ttysnoop — Watch live output from a tty or pts device — examples
• ucalls — Summarize method calls or Linux syscalls in high-level languages — examples
• uflow — Print a method flow graph in high-level languages — examples
• ugc — Trace garbage collection events in high-level languages — examples
• uobjnew — Summarize object allocation events by object type and number of bytes allocated — examples
• ustat — Collect events such as GCs, thread creations, object allocations, exceptions and more in high-level languages — examples
• uthreads — Trace thread creation events in Java and raw pthreads — examples
• vfscount — Count VFS calls — examples
• vfsstat — Count some VFS calls, with column output — examples
• virtiostat — Show VIRTIO device IO statistics — examples
• wakeuptime — Summarize sleep to wakeup time by waker kernel stack — examples
• xfsdist — Summarize XFS operation latency distribution as a histogram — examples
• xfsslower — Trace slow XFS operations — examples
• zfsdist — Summarize ZFS operation latency distribution as a histogram — examples
• zfsslower — Trace slow ZFS operations — examples

For reference, I used this script to test if we have each tool documented:

#!/bin/sh
tldrfind() {
    for p in "$TLDR_ROOT"/pages*; do
        for d in "$p"/*; do
            if [ -f "$d"/"$1".md ]; then
                echo 1
                return 0
            fi
        done
    done
    echo 0
    return 1
}