Hi Vineet, On Thu, 2018-03-15 at 09:38 -0700, Vineet Gupta wrote: > On 03/15/2018 02:27 AM, Adrian Hunter wrote: > > Please try: > > > > perf record -a -e mmc:* -- bonnie++ -u root -r 256 -s 512 -x 1 -d /mnt > > > > and share the resulting perf.data file when you are able > > to reproduce the hung task message. > > > > You may want to add this patch first: > > > > https://marc.info/?l=linux-mmc&m=152110580324200 > > While this SoC has perf counters, Unfortunately the overflow interrupts are not > wired up. We can do perf stats but not sampling. I guess here Adrian was asking for pure software MMC-related events which are orthogonal to CPU's perf interrupts. Adrian? -Alexey
