#bcc Count map.ringbuf_reserve() failures #bcc
On Tue, Nov 2, 2021 at 03:24 PM, Eelco Chaudron wrote:
Thought I added the #bcc tag but I no longer see it :( So just in case, it's not clear, this is with BCC.
On Tue, Nov 2, 2021 at 7:31 AM Eelco Chaudron <echaudro@...> wrote:
You can check return value of map.ringbuf_reserve(). If the
reservation failed, you can notify user space through map, another
side channel ringbuf, perf buf, etc. Depending on your program type
and program running context, you might be able to use
bpf_send_signal() helper to send a signal to the *current* process.
On 3 Nov 2021, at 6:26, Y Song wrote:
On Tue, Nov 2, 2021 at 7:31 AM Eelco Chaudron <echaudro@...> wrote:Thanks, I was looking at BCC to solve this in the wrappers, but you are right, as simple BPF_TABLE() solved it.You can check return value of map.ringbuf_reserve(). If the
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