On 7/3/2025 9:16 AM, Jacob Keller wrote: > On 7/2/2025 11:46 PM, Jaroslav Pulchart wrote: >>> think iperf doesn't do that, which might be part of whats causing this >>> issue. I'm going to try to see if I can generate such fragmentation to >>> confirm. Is your MTU kept at the default ethernet size? >> >> Our MTU size is set to 9000 everywhere. >> > > Ok. I am re-trying with MTU 9000 and using some traffic generated by wrk > now. I do see much larger memory use (~2GB) when using MTU 9000, so that > tracks with what your system shows. Currently its fluctuating between > 1.9 and 2G. I'll leave this going for a couple of days while on vacation > and see if anything pops up. > > Thanks, > Jake
Good news! After several days of running a wrk and iperf3 workload with 9k MTU, I see a significant increase in the memory usage from the page allocations: 7.3G 953314 drivers/net/ethernet/intel/ice/ice_txrx.c:682 [ice] func:ice_alloc_mapped_page ~5GB extra. At least I can reproduce this now. Its unclear how long it took since I was out on vacation from Wednesday through until now. I do have a singular hypothesis regarding the way we're currently tracking the page count, (just based on differences between ice and i40e). I'm going to attempt to align with i40e and re-run the test. Hopefully I'll have some more information in a day or two.
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