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c18037074c
Commentary wording now refers to tasks (i.e., threads) rather than processes. This makes it somewhat easier to justify adding two kinds of counters together. After researching what "load average" has meant over time, we have what seems like a reasonable implementation, modulo Windows differences to Linux. The best resource I found is: https://www.brendangregg.com/blog/2017-08-08/linux-load-averages.html At end of load_init(), obtain and discard the first measure of the counters to deal with the first call always returning error, no data. Follow this with a specific short delay so the next measure actually has data to report. At least one older version of Windows, i.e. Win10 Pro 21H1, has a different name/location for the '% Processor Time' counter and is missing the 'Processor Queue Length' counter entirely. Code is changed to support both possible locations of the former and treat the missing latter as always reporting 0.0. A release note is added for 3.5.6. Reported-by: Mark Liam Brown <brownmarkliam@gmail.com> Addresses: https://cygwin.com/pipermail/cygwin/2024-August/256361.html Signed-off-by: Mark Geisert <mark@maxrnd.com> Fixes: 4dc982ddf60b (Cygwin: loadavg: improve debugging of load_init) (cherry picked from commit 0135b94949d2c9ba0b0f839fae8ff49a5bfe8589)
THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. Cygwin documentation is available on the net at https://cygwin.com You might especially be interested in https://cygwin.com/faq/faq.html#faq.programming.building-cygwin