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Warping
#1
Hello,

I am running 2 servers on a single Xeon 3Ghz, 1.5GB memory.
All ressources usage is low: CPU < 30%, RAM < 20%.

However, I experience warping issues. No loss, almost no choke, good ping. Just 1-2 seconds warps every minute or so, with sometimes the inventory showing while I run.

I tried:
- using other kernels (from stock kernels to recompiling, w/o SMP, w/o SMT, w/o irq balancing, different io schedulers, w/o preemption etc etc ....)
- disabling all other software on the box (mysql, apache, crontabs...)
- testing the bandwidth with iperf (udp)
- layer 2 (ethernet) monitoring
- net_showdrop 1

Nothing helped.

I do have a few packet losses, but nothing exceptionnal (same level of losses on other servers do not lead to that kind of warping).

I am still trying to figure if the problem comes from the box or the network. Any leads as to how to troubleshoot further, other than moving the box to another network?
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#2
It may help others: I tracked it down to faulty Ethernet cabling.
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