Francois Romieu wrote:
Benjamin LaHaise <[EMAIL PROTECTED]> : [...]I'm seeing something odd with r8169 on FC7: doing a ping -s 1600 alternates between a 1s latency and sub 1ms. Has anyone else seen anything like this? The system in question is an Asus M2A-VM with an onboard RTL8111 (I think). NAPI doesn't seem to make a difference. The kernel in question is currently a vanilla 2.6.21.5. Sub-mtu sized packets behave normally.Same thing here for my 8168 rev 01 (asrock 945G dvi LOM) with 2.6.22-rc4 and 2.6.22-rc3 + r816x patchkit. Wonderful.
I've got a modified version of the latest realtek (r8168) driver running here that doesn't seem to exhibit those symptoms.
The trouble I have is that I've been playing with multiple sections of the code and I'm not 100% sure what part(s) might impact that particular test. The bits I know I've messed with are the bits that set the First/Last fragment flags and the NPQ flagging section (as described in my previous emails).
I know it's not particularly scientific of me to be changing multiple sections of the driver at once and I'm sorry about that but it's fairly late here and I really should get some sleep :). I might do some more thorough testing on the weekend to find out what the minimal changes required are to get things working.
In the mean-time I'll attach my patch for the r8168-8.001.00 realtek driver here in case anybody else wants to have a play with it and see if it helps them out.
Also, It might be a silly question, but have you tried taking packet captures from the perspective of the box with the realtek chipset & another box during the pinging and comparing the two?
Regards, Dave.
r8168-8.001.00-dg.patch.gz
Description: GNU Zip compressed data
