Bug 1430 - af_xdp: reset stats has no effect on imissed
Summary: af_xdp: reset stats has no effect on imissed
Status: UNCONFIRMED
Alias: None
Product: DPDK
Classification: Unclassified
Component: ethdev (show other bugs)
Version: 24.03
Hardware: All All
: Normal minor
Target Milestone: ---
Assignee: dev
URL:
Depends on:
Blocks:
 
Reported: 2024-05-01 16:41 CEST by Stephen Hemminger
Modified: 2024-05-01 16:41 CEST (History)
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Description Stephen Hemminger 2024-05-01 16:41:03 CEST 
Since the AF_XDP PMD queries the kernel to find the number of missed packets,
it does not handle the case where stats have been reset.

Something like:
        ...
        eth_stats_get()
              = stats->imissed was 5 packets
        eth_stats_reset()
        eth_stats_get()
              = stats->imissed will still be 5 packets

The driver needs to record the count in the reset handler and then
offset the read count on the next stats get.
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