在 2025/5/7 19:09, Jonathan Cameron 写道:
On Wed, 7 May 2025 09:15:35 +0800 Shuai Xue <xueshuai@xxxxxxxxxxxxxxxxx> wrote:Hotplug events are critical indicators for analyzing hardware health, particularly in AI supercomputers where surprise link downs can significantly impact system performance and reliability. To this end, define a new TRACING_SYSTEM named pci, add a generic RAS tracepoint for hotplug event to help healthy check, and generate tracepoints for pcie hotplug event. Add enum pci_hotplug_event in include/uapi/linux/pci.h so applications like rasdaemon can register tracepoint event handlers for it. The output like below: $ echo 1 > /sys/kernel/debug/tracing/events/pci/pci_hp_event/enable $ cat /sys/kernel/debug/tracing/trace_pipe <...>-206 [001] ..... 40.373870: pci_hp_event: 0000:00:02.0 slot:10, event:Link Down <...>-206 [001] ..... 40.374871: pci_hp_event: 0000:00:02.0 slot:10, event:Card not present Suggested-by: Lukas Wunner <lukas@xxxxxxxxx> Suggested-by: Steven Rostedt <rostedt@xxxxxxxxxxx> Reviewed-by: Lukas Wunner <lukas@xxxxxxxxx> Signed-off-by: Shuai Xue <xueshuai@xxxxxxxxxxxxxxxxx>FWIW looks good to me. Reviewed-by: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>
Thanks :)
Any userspace tooling planned for this?
Yep, we plan to monitor this tracepoint in rasdaemon after this patch merged. Best Regards, Shuai
