Hi Lin,
could you keep the lttng-dev list in CC on your replies in the future?
On 2023-10-24 09:25, Lin ArcX wrote:
Thanks for your response. i fixed the names. here is new commands:
# enable event for traced functions
sudo lttng enable-event --kernel irq_handler_entry,napi_poll,net_dev_queue
# different name with kernel
sudo lttng enable-event --kernel
net_if_rx_entry,net_if_rx_ni_entry,net_napi_gro_receive_entry,net_if_receive_skb_list_entry,net_if_receive_skb
Now In new tracefile i can see a lot of new events come. but still can't
see any trace from these:
net_if_rx_ni_entry
net_napi_gro_receive_entry
net_if_receive_skb_list_entry
This looks fine to me.
On a linux 4.19 system, I ran a test with using lttng-modules 2.12.14. I
saw events for "net_napi_gro_receive_entry".
In parallel with the LTTng tracing session, I ran
perf stat -e
net:netif_rx_ni_entry,net:netif_receive_skb_list_entry,net:napi_gro_receive_entry
The above allowed me to confirm that there were
"net:napi_gro_receive_entry_events", but no "net:netif_rx_ni_entry" or
"net:netif_receive_skb_list_entry" occurrences in my test.
Are you seeing a situation where another tool is recording occurrences
of the events that you think aren't being seen during your tracing session?
thanks,
kienan
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