[v3 00/10] Improve RISC-V Perf support using SBI PMU and sscofpmf extension

[Atish Patra]

On Tue, Oct 5, 2021 at 2:18 AM Nikita Shubin <nikita.shubin at maquefel.me> wrote:
>
> On Fri, 10 Sep 2021 12:27:47 -0700
> Atish Patra <atish.patra at wdc.com> wrote:
>
> Hello Atish,
>
> > Perf stat:
> > =========
> >
> > [root at fedora-riscv riscv]# perf stat -e r8000000000000005 -e
> > r8000000000000007 -e r8000000000000006 -e r0000000000020002 -e
> > r0000000000020004 -e branch-misses -e cache-misses -e
> > dTLB-load-misses -e dTLB-store-misses -e iTLB-load-misses -e cycles
> > -e instructions ./hackbench -pipe 15 process Running with 15*40 (==
> > 600) tasks. Time: 6.578
> >
> >  Performance counter stats for './hackbench -pipe 15 process':
> >
> >              6,491      r8000000000000005      (52.59%) -->
> > SBI_PMU_FW_SET_TIMER 20,433      r8000000000000007      (60.74%) -->
> > SBI_PMU_FW_IPI_RECVD 21,271      r8000000000000006      (68.71%) -->
> > SBI_PMU_FW_IPI_SENT 0      r0000000000020002      (76.55%)
> >      <not counted>      r0000000000020004      (0.00%)
> >      <not counted>      branch-misses          (0.00%)
> >      <not counted>      cache-misses           (0.00%)
> >         57,537,853      dTLB-load-misses       (9.49%)
> >          2,821,147      dTLB-store-misses      (18.64%)
> >         52,928,130      iTLB-load-misses       (27.53%)
> >     89,521,791,110      cycles                 (36.08%)
> >     90,678,132,464      instructions #    1.01  insn per cycle
> > (44.44%)
> >
> >        6.975908032 seconds time elapsed
> >
> >        3.130950000 seconds user
> >       24.353310000 seconds sys
> >
>
> Tested your patch series with qemu and got results as expected:
>
> perf stat -e r8000000000000005 -e r8000000000000007 \
> -e r8000000000000006 -e r0000000000020002 -e r0000000000020004 -e
> branch-misses \ -e cache-misses -e dTLB-load-misses -e
> dTLB-store-misses -e iTLB-load-misses \ -e cycles -e instructions
> ./hackbench -pipe 15 process
>
> Running with 15*40 (== 600) tasks.nch -pipe 15 process
> Time: 20.027
>
>  Performance counter stats for './hackbench -pipe 15 process':
>
>               4896      r8000000000000005
>                             (53.34%) 0      r8000000000000007
>                                                 (61.20%) 0
>               r8000000000000006
>                   (68.88%) 0      r0000000000020002
>                                       (76.53%) <not counted>
>               r0000000000020004
>                   (0.00%) <not counted>      branch-misses
>                                                  (0.00%) <not counted>
>                   cache-misses
>                       (0.00%) 48414917      dTLB-load-misses
>                                                 (9.87%) 2427413
>               dTLB-store-misses
>                   (19.43%) 46958092      iTLB-load-misses
>                                              (28.58%) 69245163600
>               cycles
>                   (37.09%) 70334279943      instructions              #
>                  1.02  insn per cycle           (45.24%)
>
>       20.895871900 seconds time elapsed
>
>        2.724942000 seconds user
>       18.126277000 seconds sys
>
> perf top/record also works.
>
> Tested-by: Nikita Shubin <n.shubin at yadro.com>
>

Thanks for the testing.

> Yours,
> Nikita Shubin
>
>
>
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-- 
Regards,
Atish