Request for CVS Branches.

Hello Henrik / Adrian,

This is regarding some of the development work in Squid undertaken by
ViSolve team. We have partially completed the following two implementations.

1. RT Signal implementation.
The objective of using RealTime signals to implement network I/O is to
reduce CPU usage dramatically, thereby improving performance. The
select/poll model must scan through a huge array of file descriptors to see
which ones are ready for reading or writing. This scanning takes up lots of
CPU time. With RealTime signals, read/write events for a socket are placed
on a queue. To retrieve events, instead of polling, one just retrieves the
first item in the queue.

We have tested squid-2.4.STABLE3 and squid-2.4.STABLE3 with RT signal patch
by disabling the disk. The results show very sigificant improvement in the
performance. These two tests are taken with polymix-3 and hardware
configurations are
Processor : Pentium-3 933MHz
RAM : 512MB
NIC : 100Mbps card

Our RT signal squid went upto 500 req/sec with CPU usage is below 80%, where
as squid-2.4.STABLE3 reaches 100% CPU usage in 150 req/sec itself. When we
test our RT signal code by enabling the disk It is satisfying upto
230req/sec in the above configuration. During the test the CPU usage is less
than 40% and memory usage for squid is 105MB, overall response time is 1.3
sec, miss response time is 2.5 sec and hit response time is .26 sec. This is
55% more than the normal squid.

We have implemented this in Linux OS, kernel 2.4.13 by adding a patch for RT
Signal. We have also identified other challenges which we think could be
overcome with your help.

2. WCCP 2.0 compliance.
Reference: Open source code developed by Joe Cooper in Squid 2.2 for Wccp
2.0
compliance. We have worked on the above said reference and have changed
Squid 2.4 and
Squid 2.5 for WCCP 2.0 Compliance.

We request for 2 separate CVS branches for these codes or request
suggestions from you on the
procedure to submit the code and to share our futher developments in these
two branches
with Squid developers who would be interested to further this effort.

Best Regards,
squid team
www.visolve.com
Received on Fri May 10 2002 - 01:34:06 MDT