Re: [RESEND PATCH 0/7] perf vendor events riscv: Update SiFive CPU PMU events

[Samuel Holland]

Hi Atish,

On 2025-03-01 3:21 AM, Atish Patra wrote:
> On Wed, Feb 19, 2025 at 1:27 PM Namhyung Kim <namhyung@xxxxxxxxxx> wrote:
>>
>> Hello,
>>
>> On Wed, Feb 12, 2025 at 05:21:33PM -0800, Samuel Holland wrote:
>>> This series updates the PMU event JSON files to add support for newer
>>> SiFive CPUs, including those used in the HiFive Premier P550 board.
>>> Since most changes are incremental, symbolic links are used when a set
>>> of events is unchanged from the previous CPU series.
>>>
>>> I originally sent this series about a year ago[1], but received no
>>> feedback. The P550 board is now available (and I have tested this series
>>> on it), so it would be good to get perf support for it upstream.
>>>
>>> [1]: https://lore.kernel.org/linux-perf-users/20240509021531.680920-1-samuel.holland@xxxxxxxxxx/
>>>
> 
> Tested the patches that are part of sifive's release tree for p550.
> Both perf stat/record seems to work fine
> for a bunch of events.
> 
> Based on that
> Tested-by: Atish Patra <atishp@xxxxxxxxxxxx>

Thanks for testing!

> @Samuel Holland : perf report that the following two events are not
> supported on the p550 board.
> 
> cycle and instruction count:
>   core_clock_cycles
>        [Counts core clock cycles]
>   instructions_retired
>        [Counts instructions retired]
> 
> I assumed that these are raw events cycle/instruction retired events
> that can support
> perf sampling as well. Maybe I am missing something ? DT binding ?

perf is correct. Those two events are not supported on P550, only by the newer
cores (bulled-0d and p650). Yes, those are aliases of cycles and instructions
that were added to support sampling.

Regards,
Samuel

>>>
>>> Eric Lin (5):
>>>   perf vendor events riscv: Update SiFive Bullet events
>>>   perf vendor events riscv: Add SiFive Bullet version 0x07 events
>>>   perf vendor events riscv: Add SiFive Bullet version 0x0d events
>>>   perf vendor events riscv: Add SiFive P550 events
>>>   perf vendor events riscv: Add SiFive P650 events
>>>
>>> Samuel Holland (2):
>>>   perf vendor events riscv: Rename U74 to Bullet
>>>   perf vendor events riscv: Remove leading zeroes
>>
>> It'd be nice if anyone in the RISC-V community can review this.
>>
>> Thanks,
>> Namhyung
>>
>>>
>>>  tools/perf/pmu-events/arch/riscv/mapfile.csv  |  6 +-
>>>  .../cycle-and-instruction-count.json          | 12 +++
>>>  .../arch/riscv/sifive/bullet-07/firmware.json |  1 +
>>>  .../riscv/sifive/bullet-07/instruction.json   |  1 +
>>>  .../arch/riscv/sifive/bullet-07/memory.json   |  1 +
>>>  .../riscv/sifive/bullet-07/microarch.json     | 62 +++++++++++++
>>>  .../riscv/sifive/bullet-07/watchpoint.json    | 42 +++++++++
>>>  .../cycle-and-instruction-count.json          |  1 +
>>>  .../arch/riscv/sifive/bullet-0d/firmware.json |  1 +
>>>  .../riscv/sifive/bullet-0d/instruction.json   |  1 +
>>>  .../arch/riscv/sifive/bullet-0d/memory.json   |  1 +
>>>  .../riscv/sifive/bullet-0d/microarch.json     | 72 +++++++++++++++
>>>  .../riscv/sifive/bullet-0d/watchpoint.json    |  1 +
>>>  .../sifive/{u74 => bullet}/firmware.json      |  0
>>>  .../arch/riscv/sifive/bullet/instruction.json | 92 +++++++++++++++++++
>>>  .../arch/riscv/sifive/bullet/memory.json      | 32 +++++++
>>>  .../arch/riscv/sifive/bullet/microarch.json   | 57 ++++++++++++
>>>  .../arch/riscv/sifive/p550/firmware.json      |  1 +
>>>  .../arch/riscv/sifive/p550/instruction.json   |  1 +
>>>  .../arch/riscv/sifive/p550/memory.json        | 47 ++++++++++
>>>  .../arch/riscv/sifive/p550/microarch.json     |  1 +
>>>  .../p650/cycle-and-instruction-count.json     |  1 +
>>>  .../arch/riscv/sifive/p650/firmware.json      |  1 +
>>>  .../arch/riscv/sifive/p650/instruction.json   |  1 +
>>>  .../arch/riscv/sifive/p650/memory.json        | 57 ++++++++++++
>>>  .../arch/riscv/sifive/p650/microarch.json     | 62 +++++++++++++
>>>  .../arch/riscv/sifive/p650/watchpoint.json    |  1 +
>>>  .../arch/riscv/sifive/u74/instructions.json   | 92 -------------------
>>>  .../arch/riscv/sifive/u74/memory.json         | 32 -------
>>>  .../arch/riscv/sifive/u74/microarch.json      | 57 ------------
>>>  30 files changed, 555 insertions(+), 182 deletions(-)
>>>  create mode 100644 tools/perf/pmu-events/arch/riscv/sifive/bullet-07/cycle-and-instruction-count.json
>>>  create mode 120000 tools/perf/pmu-events/arch/riscv/sifive/bullet-07/firmware.json
>>>  create mode 120000 tools/perf/pmu-events/arch/riscv/sifive/bullet-07/instruction.json
>>>  create mode 120000 tools/perf/pmu-events/arch/riscv/sifive/bullet-07/memory.json
>>>  create mode 100644 tools/perf/pmu-events/arch/riscv/sifive/bullet-07/microarch.json
>>>  create mode 100644 tools/perf/pmu-events/arch/riscv/sifive/bullet-07/watchpoint.json
>>>  create mode 120000 tools/perf/pmu-events/arch/riscv/sifive/bullet-0d/cycle-and-instruction-count.json
>>>  create mode 120000 tools/perf/pmu-events/arch/riscv/sifive/bullet-0d/firmware.json
>>>  create mode 120000 tools/perf/pmu-events/arch/riscv/sifive/bullet-0d/instruction.json
>>>  create mode 120000 tools/perf/pmu-events/arch/riscv/sifive/bullet-0d/memory.json
>>>  create mode 100644 tools/perf/pmu-events/arch/riscv/sifive/bullet-0d/microarch.json
>>>  create mode 120000 tools/perf/pmu-events/arch/riscv/sifive/bullet-0d/watchpoint.json
>>>  rename tools/perf/pmu-events/arch/riscv/sifive/{u74 => bullet}/firmware.json (100%)
>>>  create mode 100644 tools/perf/pmu-events/arch/riscv/sifive/bullet/instruction.json
>>>  create mode 100644 tools/perf/pmu-events/arch/riscv/sifive/bullet/memory.json
>>>  create mode 100644 tools/perf/pmu-events/arch/riscv/sifive/bullet/microarch.json
>>>  create mode 120000 tools/perf/pmu-events/arch/riscv/sifive/p550/firmware.json
>>>  create mode 120000 tools/perf/pmu-events/arch/riscv/sifive/p550/instruction.json
>>>  create mode 100644 tools/perf/pmu-events/arch/riscv/sifive/p550/memory.json
>>>  create mode 120000 tools/perf/pmu-events/arch/riscv/sifive/p550/microarch.json
>>>  create mode 120000 tools/perf/pmu-events/arch/riscv/sifive/p650/cycle-and-instruction-count.json
>>>  create mode 120000 tools/perf/pmu-events/arch/riscv/sifive/p650/firmware.json
>>>  create mode 120000 tools/perf/pmu-events/arch/riscv/sifive/p650/instruction.json
>>>  create mode 100644 tools/perf/pmu-events/arch/riscv/sifive/p650/memory.json
>>>  create mode 100644 tools/perf/pmu-events/arch/riscv/sifive/p650/microarch.json
>>>  create mode 120000 tools/perf/pmu-events/arch/riscv/sifive/p650/watchpoint.json
>>>  delete mode 100644 tools/perf/pmu-events/arch/riscv/sifive/u74/instructions.json
>>>  delete mode 100644 tools/perf/pmu-events/arch/riscv/sifive/u74/memory.json
>>>  delete mode 100644 tools/perf/pmu-events/arch/riscv/sifive/u74/microarch.json
>>>
>>> --
>>> 2.47.0
>>>
>>
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> 
> 
> 
> --
> Regards,
> Atish