On Fri, Apr 5, 2019 at 9:38 AM Will Deacon <will.deacon@xxxxxxx> wrote: > > On Fri, Apr 05, 2019 at 09:34:38AM -0500, Zhi Li wrote: > > On Thu, Apr 4, 2019 at 6:17 AM Will Deacon <will.deacon@xxxxxxx> wrote: > > > > > > Hi Frank, > > > > > > On Fri, Feb 15, 2019 at 06:03:11PM +0000, Frank Li wrote: > > > > Add ddr performance monitor support for iMX8QXP > > > > > > > > There are 4 counters for ddr perfomance events. > > > > counter 0 is dedicated for cycles. > > > > you choose any up to 3 no cycles events. > > > > > > > > for example: > > > > > > > > perf stat -a -e ddr0/read-access/,ddr0/write-access/,ddr0/precharge/ ls > > > > perf stat -a -e ddr0/cycles/,ddr0/read-access/,ddr0/write-access/ ls > > > > > > Could you elaborate a bit on DDR_CAP_AXI_ID, please? Specifically, how Only imx845 have AXID filter capability now. > > > does the COUNTER_DPCR1 register work and what happens if I specify two > > > simultaneous events with different values in config1? I'm a little wary There are difference match register for each event. 1. Read event with config 1 A 2. Read event with config 1 B 1 will show read count with filter A 2 will show read count with filter B. > > > of taking raw user input and throwing it straight into a device register! > > > > I have not find better method to do that. > > bit 0-15: AXIID > > bit 16-31: AXID_MASK > > > > Check condition AxID && AXI_MASKING == AXI_ID && AXI_MASKING > > Hmm, that doesn't really answer my second question :( > > What happens if I specify two simultaneous events with different values > in config1? Sorry, see above answer. > > Will
