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Re: FC4 possible kernel 2.6.15 issue



Skunk Worx wrote:
I use the GSOAP soap server toolkit for transferring data.

Prior to kernel 2.6.15 I could pull about 3000 data items a second using the various persistent http connection toolkit options over TCP/IP.

Under 2.6.15 I am lucky to get 100 items/sec using the same codebase.

Reverting only the kernel, back to the last 2.6.14 in yum updates, fixes it. Not sure where else to post this as I know Fedora tends to patch the kernel a bit.

--
SW


I see via ethereal gsoap is using http continuation, and also keep alive/io chunking in the http headers under both kernels. No errnos in strace of servers or clients, and nothing in var/log/messages. Turning DEBUG on in GSOAP shows no major difference in the .log files between kernel versions.

Having the same problem on FC5t3 with kernel 2.6.15-1.2009.4.2_FC5

One of the guys I work with has a lot of UNIX experience at the kernel level and he is going to help me next week. I wonder if the server is refusing to thread faster than 100 hz? Our GSOAP server is implemented using pthreads.

Will run more tests early next week.

--
SW


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