Hello Development Team,
We are benchmarking squid performance with epoll() / without epoll() on the
hardware configuration of,
model name : Pentium III (Coppermine)
cpu MHz : 927.753
RAM size : 512 MB
version : Fedora core 2 - 2.6.5
Results with squid-3.0 ( Development ) and squid-2.5S7 (Stable ) are as,
squid-3.0 Pre3 + epoll() + in-core memory + /dev/null fs ( with epoll() ) :
=================================================
req.rate = 371 req / sec
rep.rate = 370 rep / sec
Problem : CPU usage to 100% - CPU bound
squid-3.0 Pre3 + poll() + in-core memory + /dev/null fs ( without epoll() ) :
==================================================
req.rate = 345 req / sec
rep.rate = 344 rep / sec
Problem : CPU usage to 100% - CPU bound
poll() vs epoll() :
using poll(), squid is using 50% - 60% usage for even 50 - 150 requests
/ sec. epoll() is utilizing around 10-15% cpu usage.
( report based on top tool )
squid-2.5 Stable 7 + poll() + in-core memory + /dev/null fs ( Stable
version ) :
====================================================
req.rate=612 req / sec
rep.rate=611 rep / sec
Problem : CPU usage to 100% - CPU bound
Why squid-3.0 withoutepoll() benchmark and squid-2.5 stable 7 results are
getting differed? epoll() method is making 100% cpu
usage.? Is it a right behaviour of epoll() I/O method? ( I have used recent
100% usage patch of epoll() ). NO error messages
appeared in cache.log file.
IF you want to have more informations, let us know.
Thanks for your help.
Regards
Visolve Dev. team.
