On Thu, Apr 13, 2023 at 01:59:44PM +0200, Jesper Dangaard Brouer wrote: > Hi Andi and Acme, > > Regarding below discussion and subj (top-posting as you don't need to > read discussion to answer my perf questions). > > Can we somehow use perf to profile things happening in PCIe ? > E.g. Are there any PMU counters "uncore" events for PCIe ? > > Hint, we can list more PMU counter via Andi's ocperf tool[42]. > # sudo ./ocperf list > > Could we use the TopDown [toplev] model, to indicate/detect that the > PCIe device (or PCIe root complex) is the bottleneck? perf list uncore_iio_free_running has the bandwidth counters on Intel servers. It can be tricky to identify the device for that, there was a patchkit from Alexander Andronov to make it easier, but I'm not sure if it made it in. -Andi
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