The single call to bpf_ktime_get_ns uses about 30% of benchmark time on my machine. It would be a big perf win if we can replace it with something else.
There is a function bpf_jiffies64 which is probably cheaper, but less accurate. Open questions:
- What is the resolution we can get from jiffies64, and is that enough for our purposes?
- How do we convert jiffies64 to a timestamp?
The single call to
bpf_ktime_get_nsuses about 30% of benchmark time on my machine. It would be a big perf win if we can replace it with something else.There is a function
bpf_jiffies64which is probably cheaper, but less accurate. Open questions: