On 26/01/22 12:14, André Bolinhas wrote:
Hi
I have a question regarding with this topic to, I need about 2M
filedescriptors so my squid is compiled with --enable-poll and
--enable-epoll.
In this case which mechanism Squid will use poll or epoll?
Should be epoll. You can verify with the cachemgr API:
squidclient mgr:menu | grep comm_incoming
poll(2) has a "comm_poll_incoming" report, and epoll(2) a matching
"comm_epoll_incoming" report. If you have neither, then your Squid is
using one of the other modules.
Also, for better performance for large FD, which mechanism did you recommend
poll, epoll or kqueue?
Recommended preference order for those is: epoll, kqueue, poll.
FWIW; with features like this where they are already well-known and
tested for years the build process and/or squid.conf defaults have
usually been designed to take care of these decisions automatically.
In this case, at most, you should only need to use ./configure options.
Squid follow the auto-tools best practice:
"--enable-foo" *requires* that foo dependencies etc all exist and be
usable, else configure halts with an error.
"--disable-foo" forces foo to be omitted from the build.
not specifying anything will attempt to enable foo as best-effort. But
with problems it will only log an error and leave 'foo' out of the build.
Cheers
Amos
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