Documentation/accounting/psi.rst

4 PSI - Pressure Stall Information
11 latency spikes, throughput losses, and run the risk of OOM kills.
14 either play it safe and under-utilize their hardware resources, or
23 scarcity aids users in sizing workloads to hardware--or provisioning
38 respective file in /proc/pressure/ -- cpu, memory, and io.
52 The "full" line indicates the share of time in which all non-idle
64 (in us) is tracked and exported as well, to allow detection of latency
76 generate a wakeup event.
84 	<some|full> <stall amount in us> <time window in us>
112 Notifications to the userspace are rate-limited to one per tracking window.
114 The trigger will de-register when the file descriptor used to define the
154 		n = poll(&fds, 1, -1);
183 Per-cgroup psi monitors can be specified and used the same way as
184 system-wide ones.