Module scan 

Reading /proc and /sys.

All hot-path reads go through thread_local! scratch buffers so a scan allocates nothing per process (docs/DESIGN.md §9.4).

Functions

apply_stat

Apply stat fields to a row.

is_same_process

Whether /proc/<pid> still refers to the same process identified by starttime. Used to detect PID reuse between two samples.

list_pids

List process IDs by scanning /proc for numeric directory entries.

list_tids

List the thread ids inside a process (/proc/<pid>/task).

read_disk_counters

Read host-wide disk counters from /proc/diskstats.

read_gpu_usage

Read /proc/<pid>/fdinfo/* and sum every DRM descriptor’s counters.

read_identity

Fetch (and cache) the immutable identity of one process.

read_loadavg

Read /proc/loadavg.

read_meminfo

Read /proc/meminfo.

read_net_counters

Read host-wide network counters from /proc/net/dev.

read_proc_stat

Read /proc/stat.

read_psi

Read /proc/pressure/{cpu,memory,io,irq}.

read_stat

Read the stat file of one process.

read_thread_stat

Read stat for one thread of pid.

read_uptime

Read /proc/uptime, returning whole seconds.

read_zram

Read every zram device’s /sys/block/zram<N>/mm_stat.

read_zswap_max_percent

Read max_pool_percent from /sys/module/zswap/parameters.