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.
48 The "full" line indicates the share of time in which all non-idle
63 (in us) is tracked and exported as well, to allow detection of latency
75 generate a wakeup event.
83 	<some|full> <stall amount in us> <time window in us>
116 Notifications to the userspace are rate-limited to one per tracking window.
118 The trigger will de-register when the file descriptor used to define the
158 		n = poll(&fds, 1, -1);
187 Per-cgroup psi monitors can be specified and used the same way as
188 system-wide ones.