linux-kernel - Re: [PATCH v2 1/1] perf jitdump: Add riscv64 support.

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Date:   Mon, 11 Apr 2022 16:40:50 -0300
From:   Arnaldo Carvalho de Melo <acme@...nel.org>
To:     Eric Lin <eric.lin@...ive.com>
Cc:     peterz@...radead.org, mingo@...hat.com, mark.rutland@....com,
        alexander.shishkin@...ux.intel.com, jolsa@...nel.org,
        namhyung@...nel.org, palmer@...belt.com, aou@...s.berkeley.edu,
        iii@...ux.ibm.com, linux-perf-users@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-riscv@...ts.infradead.org,
        paul.walmsley@...ive.com
Subject: Re: [PATCH v2 1/1] perf jitdump: Add riscv64 support.

Em Mon, Apr 11, 2022 at 06:54:38PM +0800, Eric Lin escreveu:
> This patch enable perf jitdump for riscv64 and it tested with V8 on qemu rv64.
> 
> Qemu rv64:
> $ perf record -e cpu-clock -c 1000 -g -k mono ./d8_rv64 --perf-prof --no-write-protect-code-memory test.js
> $ perf inject -j -i perf.data -o perf.data.jitted
> $ perf report -i perf.data.jitted

Thanks, applied.

- Arnaldo

 
> Output:
>  To display the perf.data header info, please use --header/--header-only options.
> 
>  Total Lost Samples: 0
> 
>  Samples: 87K of event 'cpu-clock'
>  Event count (approx.): 87974000
> 
>  Children      Self  Command          Shared Object                Symbol
> 
> ....
>      0.28%     0.06%  d8_rv64          d8_rv64                      [.] _ZN2v88i
> nternal6WasmJs7InstallEPNS0_7IsolateEb
>      0.28%     0.00%  d8_rv64          d8_rv64                      [.] _ZN2v88i
> nternal10ParserBaseINS0_6ParserEE22ParseLogicalExpressionEv
>      0.28%     0.03%  d8_rv64          jitted-112-76.so             [.] Builtin:
> InterpreterEntryTrampoline
>      0.12%     0.00%  d8_rv64          d8_rv64                      [.] _ZN2v88i
> nternal19ContextDeserializer11DeserializeEPNS0_7IsolateENS0_6HandleINS0_13JSGlob
> alProxyEEENS_33DeserializeInternalFieldsCallbackE
>      0.12%     0.01%  d8_rv64          jitted-112-651.so            [.] Builtin:
> CEntry_Return1_DontSaveFPRegs_ArgvOnStack_NoBuiltinExit
> ....
> 
> Signed-off-by: Eric Lin <eric.lin@...ive.com>
> ---
>  tools/perf/arch/riscv/Makefile | 1 +
>  tools/perf/util/genelf.h       | 3 +++
>  2 files changed, 4 insertions(+)
> 
> diff --git a/tools/perf/arch/riscv/Makefile b/tools/perf/arch/riscv/Makefile
> index 1aa9dd772489..a8d25d005207 100644
> --- a/tools/perf/arch/riscv/Makefile
> +++ b/tools/perf/arch/riscv/Makefile
> @@ -2,3 +2,4 @@ ifndef NO_DWARF
>  PERF_HAVE_DWARF_REGS := 1
>  endif
>  PERF_HAVE_ARCH_REGS_QUERY_REGISTER_OFFSET := 1
> +PERF_HAVE_JITDUMP := 1
> diff --git a/tools/perf/util/genelf.h b/tools/perf/util/genelf.h
> index 3db3293213a9..ae138afe6c56 100644
> --- a/tools/perf/util/genelf.h
> +++ b/tools/perf/util/genelf.h
> @@ -38,6 +38,9 @@ int jit_add_debug_info(Elf *e, uint64_t code_addr, void *debug, int nr_debug_ent
>  #elif defined(__s390x__)
>  #define GEN_ELF_ARCH	EM_S390
>  #define GEN_ELF_CLASS	ELFCLASS64
> +#elif defined(__riscv) && __riscv_xlen == 64
> +#define GEN_ELF_ARCH	EM_RISCV
> +#define GEN_ELF_CLASS	ELFCLASS64
>  #else
>  #error "unsupported architecture"
>  #endif
> -- 
> 2.35.1

-- 

- Arnaldo