tree d2aa1bba9c9bd85ea22f502e4f14c943f8ed65fa
parent c208a54ab2aede84402d38758f855789b1a836d1
author Willy Tarreau <w@1wt.eu> 1592418318 +0200
committer Willy Tarreau <w@1wt.eu> 1592418318 +0200
encoding latin1

MINOR: activity: report the number of times poll() reports I/O

The "show activity" output mentions a number of indicators to explain
wake up reasons but doesn't have the number of times poll() sees some
I/O. And given that multiple events can happen simultaneously, it's
not always possible to deduce this metric by subtracting.

This patch adds a new "poll_io" counter that allows one to see how
often poll() returns with at least one active FD. This should help
detect stuck events and measure various ratios of poll sub-metrics.