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The pressure stall information (PSI) metrics provide useful information on delays caused by waiting for CPU, IO and memory. Particularly on busy servers it can provide a quick overview of what's "slowing things down". This feature is supported on Linux >= 4.20. The interface is documented here: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/plain/Documentation/accounting/psi.txt These links provide rationale: https://lwn.net/Articles/759781/ https://facebookmicrosites.github.io/psi/ The following metrics are added, corresponding to the currently exposed lines (see `head /proc/pressure/*`): - PressureStallCPUSome - PressureStallIOSome - PressureStallIOFull - PressureStallMemorySome - PressureStallMemoryFull The color scheme is the same as that used for Load Average, however I gave it separate entries just in case someone wants to change them specifically. Tested on 4.20.7-arch1-1-ARCH, on the linux platform. Also tested that other platforms still compile (changed configure to use the unsupported platform). Closes #879. |
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| .. | ||
| Battery.c | ||
| Battery.h | ||
| IOPriority.c | ||
| IOPriority.h | ||
| IOPriorityPanel.c | ||
| IOPriorityPanel.h | ||
| LinuxCRT.c | ||
| LinuxCRT.h | ||
| LinuxProcess.c | ||
| LinuxProcess.h | ||
| LinuxProcessList.c | ||
| LinuxProcessList.h | ||
| Platform.c | ||
| Platform.h | ||
| PressureStallMeter.c | ||
| PressureStallMeter.h | ||