Hi Leo, On Tue, Jan 2, 2024 at 12:50 AM Leo Yan <leo.yan@xxxxxxxxxx> wrote: > > In the Linux perf tool, the ring buffer serves not only as a medium for > transferring PMU event data but also as a vital mechanism for hardware > tracing using technologies like Intel PT and Arm CoreSight, etc. > > Consequently, the ring buffer mechanism plays a crucial role by ensuring > high throughput for data transfer between the kernel and user space > while avoiding excessive overhead caused by the ring buffer itself. > > This commit documents the ring buffer mechanism in detail. It explains > the implementation of both the regular ring buffer and the AUX ring > buffer. Additionally, it covers how these ring buffers support various > tracing modes and explains the synchronization with memory barriers. > > Signed-off-by: Leo Yan <leo.yan@xxxxxxxxxx> Thanks a lot for working on this! Reviewed-by: Namhyung Kim <namhyung@xxxxxxxxxx> Thanks, Namhyung
