intel / intel/ethernet-linux-ixgbe
ixgbe: Does ethtool -m (DOM/eeprom reads) block datapath or cause traffic delay?
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Description
Hi,
We are using ixgbe driver version 5.19.9 (firmware 0x800000cb) on Intel NICs with SFP.
We observed occasional latency spikes when running `ethtool -m ethX` to read the module
DOM/eeprom data.
1. Does `ethtool -m` on ixgbe trigger a synchronous I2C/EEPROM read that can
temporarily block the NIC datapath or cause packet delay?
2. Are there known driver or firmware versions where this was fixed or improved?
3. Is there a recommended way to read DOM data safely without disrupting traffic instead of ethtool for SFP monitoring?
Any confirmation or guidance would be appreciated.
Thanks,
Tal
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