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Re: FC4 possible kernel 2.6.15 issue



Skunk Worx wrote:
Under 2.6.14, there was one or two of these 40 ms. calls out of 48,000 calls total. Under 2.6.15, we're seeing about 3,000 40 ms. of these calls out of 48,000 calls total.

ugh, that's nasty to read.

This is only over localhost (lo). Two machines running client/server 2.6.15 over ether are fine, as is 2.6.14.

2.6.14 : about one or two recv() calls out of 48,000 take nearly 40 ms. (no big deal--might add 80 ms. to a 20 second operation).

2.6.15 : about 3,000 recv() calls out of 48,000 take nearly 40 ms. (adds almost two minutes!)

From strace :

15:27:04.568800 recv(3, "<?xml version=\"1.0\" encoding=\"UT"..., 555, ) = 555 <0.000121>

vs.

15:18:24.515891 recv(3, "<?xml version=\"1.0\" encoding=\"UT"..., 566, ) = 566 <0.038414>

--
SW


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