Comment 6 for bug 1796904

-- -proposed kernel testing --

ubuntu@helo:~$ uname -a
Linux helo 4.15.0-39-generic #42-Ubuntu SMP Tue Oct 23 15:43:48 UTC 2018 aarch64 aarch64 aarch64 GNU/Linux
ubuntu@helo:~$

ubuntu@helo:~$ apt policy linux-image-generic
linux-image-generic:
  Installed: 4.15.0.39.41
  Candidate: 4.15.0.39.41
  Version table:
 *** 4.15.0.39.41 500
        500 http://ports.ubuntu.com/ubuntu-ports bionic-proposed/main arm64 Packages
        100 /var/lib/dpkg/status
     4.15.0.38.40 500
        500 http://ports.ubuntu.com/ubuntu-ports bionic-updates/main arm64 Packages
     4.15.0.36.38 500
        500 http://ports.ubuntu.com/ubuntu-ports bionic-security/main arm64 Packages
     4.15.0.20.23 500
        500 http://ports.ubuntu.com/ubuntu-ports bionic/main arm64 Packages
ubuntu@helo:~$

ubuntu@helo:~$ perf list

List of pre-defined events (to be used in -e):

  armv8_pmuv3_0/br_immed_retired/ [Kernel PMU event]
  armv8_pmuv3_0/br_mis_pred/ [Kernel PMU event]
  armv8_pmuv3_0/br_mis_pred_retired/ [Kernel PMU event]
  armv8_pmuv3_0/br_pred/ [Kernel PMU event]
  armv8_pmuv3_0/br_retired/ [Kernel PMU event]
  armv8_pmuv3_0/br_return_retired/ [Kernel PMU event]
  armv8_pmuv3_0/bus_access/ [Kernel PMU event]
  armv8_pmuv3_0/bus_cycles/ [Kernel PMU event]
  armv8_pmuv3_0/cid_write_retired/ [Kernel PMU event]
  armv8_pmuv3_0/cpu_cycles/ [Kernel PMU event]
  armv8_pmuv3_0/exc_return/ [Kernel PMU event]
  armv8_pmuv3_0/exc_taken/ [Kernel PMU event]
  armv8_pmuv3_0/inst_retired/ [Kernel PMU event]
  armv8_pmuv3_0/inst_spec/ [Kernel PMU event]
  armv8_pmuv3_0/l1d_cache/ [Kernel PMU event]
  armv8_pmuv3_0/l1d_cache_allocate/ [Kernel PMU event]
  armv8_pmuv3_0/l1d_cache_refill/ [Kernel PMU event]
  armv8_pmuv3_0/l1d_cache_wb/ [Kernel PMU event]
  armv8_pmuv3_0/l1d_tlb/ [Kernel PMU event]
  armv8_pmuv3_0/l1d_tlb_refill/ [Kernel PMU event]
  armv8_pmuv3_0/l1i_cache/ [Kernel PMU event]
  armv8_pmuv3_0/l1i_cache_refill/ [Kernel PMU event]
  armv8_pmuv3_0/l1i_tlb/ [Kernel PMU event]
  armv8_pmuv3_0/l1i_tlb_refill/ [Kernel PMU event]
  armv8_pmuv3_0/l2d_cache/ [Kernel PMU event]
  armv8_pmuv3_0/l2d_cache_allocate/ [Kernel PMU event]
  armv8_pmuv3_0/l2d_cache_refill/ [Kernel PMU event]
  armv8_pmuv3_0/l2d_cache_wb/ [Kernel PMU event]
  armv8_pmuv3_0/l2d_tlb/ [Kernel PMU event]
  armv8_pmuv3_0/l2d_tlb_refill/ [Kernel PMU event]
  armv8_pmuv3_0/ld_retired/ [Kernel PMU event]
  armv8_pmuv3_0/mem_access/ [Kernel PMU event]
  armv8_pmuv3_0/st_retired/ [Kernel PMU event]
  armv8_pmuv3_0/stall_backend/ [Kernel PMU event]
  armv8_pmuv3_0/stall_frontend/ [Kernel PMU event]
  armv8_pmuv3_0/sw_incr/ [Kernel PMU event]
  armv8_pmuv3_0/ttbr_write_retired/ [Kernel PMU event]
  armv8_pmuv3_0/unaligned_ldst_retired/ [Kernel PMU event]

core imp def:
  bus_access_rd
       [Bus access read]
  bus_access_wr
       [Bus access write]
  exc_dabort
       [Exception taken, Data Abort and SError]
  exc_fiq
       [Exception taken, FIQ]
  exc_hvc
       [Exception taken, Hypervisor Call]
  exc_irq
       [Exception taken, IRQ]
  exc_pabort
       [Exception taken, Instruction Abort]
  exc_smc
       [Exception taken, Secure Monitor Call]
  exc_svc
       [Exception taken, Supervisor Call]
  exc_trap_dabort
       [Exception taken, Data Abort or SError not taken locally]
  exc_trap_fiq
       [Exception taken, FIQ not taken locally]
  exc_trap_irq
       [Exception taken, IRQ not taken locally]
  exc_trap_other
       [Exception taken, Other traps not taken locally]
  exc_trap_pabort
       [Exception taken, Instruction Abort not taken locally]
  exc_undef
       [Exception taken, Other synchronous]
  l1d_cache_inval
       [L1D cache invalidate]
  l1d_cache_rd
       [L1D cache access, read]
  l1d_cache_refill_inner
       [L1D cache refill, inner]
  l1d_cache_refill_outer
       [L1D cache refill, outer]
  l1d_cache_refill_rd
       [L1D cache refill, read]
  l1d_cache_refill_wr
       [L1D cache refill, write]
  l1d_cache_wb_clean
       [L1D cache Write-Back, cleaning and coherency]
  l1d_cache_wb_victim
       [L1D cache Write-Back, victim]
  l1d_cache_wr
       [L1D cache access, write]
  l1d_tlb_rd
       [L1D tlb access, read]
  l1d_tlb_refill_rd
       [L1D tlb refill, read]
  l1d_tlb_refill_wr
       [L1D tlb refill, write]
  l1d_tlb_wr
       [L1D tlb access, write]
  l2d_tlb_rd
       [L2D cache access, read]
  l2d_tlb_refill_rd
       [L2D cache refill, read]
  l2d_tlb_refill_wr
       [L2D cache refill, write]
  l2d_tlb_wr
       [L2D cache access, write]
  mem_access_rd
       [Data memory access, read]
  mem_access_wr
       [Data memory access, write]
  unaligned_ld_spec
       [Unaligned access, read]
  unaligned_ldst_spec
       [Unaligned access]
  unaligned_st_spec
       [Unaligned access, write]

  rNNN [Raw hardware event descrip
  cpu/t1=v1[,t2=v2,t3 ...]/modifier [Raw hardware event descrip
   (see 'man perf-list' on how to encode it)

  mem:<addr>[/len][:access] [Hardware breakpoint]

ubuntu@helo:~$

ubuntu@helo:~$ sudo perf stat -e l1d_cache_refill_rd,l1d_cache_refill_wr,armv8_pmuv3_0/l1d_cache_refill/ stress-ng -c 2 -i 1 -m 1 --vm-bytes 128M -t 10s
stress-ng: info: [6096] dispatching hogs: 2 cpu, 1 io, 1 vm
stress-ng: info: [6096] successful run completed in 10.86s

 Performance counter stats for 'stress-ng -c 2 -i 1 -m 1 --vm-bytes 128M -t 10s':

         215192996 l1d_cache_refill_rd
          68057599 l1d_cache_refill_wr
         283250595 armv8_pmuv3_0/l1d_cache_refill/

      11.080157375 seconds time elapsed

ubuntu@helo:~$

ubuntu@helo:~$ sudo perf stat -e unaligned_ld_spec,unaligned_st_spec,unaligned_ldst_spec,mem_access_rd,mem_access_wr,armv8_pmuv3_0/mem_access/ stress-ng -c 2 -i 1 -m 1 --vm-bytes 128M -t 10s
stress-ng: info: [6107] dispatching hogs: 2 cpu, 1 io, 1 vm
stress-ng: info: [6107] successful run completed in 10.28s

 Performance counter stats for 'stress-ng -c 2 -i 1 -m 1 --vm-bytes 128M -t 10s':

           2925792 unaligned_ld_spec
           4271379 unaligned_st_spec
           7197171 unaligned_ldst_spec
        2748840198 mem_access_rd
        2108536216 mem_access_wr
        4857376384 armv8_pmuv3_0/mem_access/

      10.609944930 seconds time elapsed

ubuntu@helo:~$