linux-kernel - Re: [PATCH 1/1] perf annotate csky: Add perf annotate support

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Date:   Wed, 26 Jun 2019 14:56:55 +0800
From:   Guo Ren <guoren@...nel.org>
To:     Mao Han <han_mao@...ky.com>
Cc:     linux-kernel@...r.kernel.org, linux-csky@...r.kernel.org,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...hat.com>,
        Namhyung Kim <namhyung@...nel.org>
Subject: Re: [PATCH 1/1] perf annotate csky: Add perf annotate support

Thx Mao,

Approved!

Best Regards
 Guo Ren

On Wed, Jun 26, 2019 at 2:53 PM Mao Han <han_mao@...ky.com> wrote:
>
> This patch add basic arch initialization and instruction associate support
> for csky.
>
> perf annotate --stdio2
> Samples: 161  of event 'cpu-clock:pppH', 4000 Hz, Event count (approx.):
> 40250000, [percent: local period]
> test_4() /usr/lib/perf-test/callchain_test
> Percent
>
>             Disassembly of section .text:
>
>             00008420 <test_4>:
>             test_4():
>               subi  sp, sp, 4
>               st.w  r8, (sp, 0x0)
>               mov   r8, sp
>               subi  sp, sp, 8
>               subi  r3, r8, 4
>               movi  r2, 0
>               st.w  r2, (r3, 0x0)
>             ↓ br    2e
> 100.00  14:   subi  r3, r8, 4
>               ld.w  r2, (r3, 0x0)
>               subi  r3, r8, 8
>               st.w  r2, (r3, 0x0)
>               subi  r3, r8, 4
>               ld.w  r3, (r3, 0x0)
>               addi  r2, r3, 1
>               subi  r3, r8, 4
>               st.w  r2, (r3, 0x0)
>         2e:   subi  r3, r8, 4
>               ld.w  r2, (r3, 0x0)
>               lrw   r3, 0x98967f    // 8598 <main+0x28>
>               cmplt r3, r2
>             ↑ bf    14
>               mov   r0, r0
>               mov   r0, r0
>               mov   sp, r8
>               ld.w  r8, (sp, 0x0)
>               addi  sp, sp, 4
>             ← rts
>
> Signed-off-by: Mao Han <han_mao@...ky.com>
> Cc: Guo Ren <guoren@...nel.org>
> Cc: Peter Zijlstra <peterz@...radead.org>
> Cc: Ingo Molnar <mingo@...hat.com>
> Cc: Arnaldo Carvalho de Melo <acme@...nel.org>
> Cc: Alexander Shishkin <alexander.shishkin@...ux.intel.com>
> Cc: Jiri Olsa <jolsa@...hat.com>
> Cc: Namhyung Kim <namhyung@...nel.org>
> ---
>  tools/perf/arch/csky/annotate/instructions.c | 48 ++++++++++++++++++++++++++++
>  tools/perf/util/annotate.c                   |  5 +++
>  2 files changed, 53 insertions(+)
>  create mode 100644 tools/perf/arch/csky/annotate/instructions.c
>
> diff --git a/tools/perf/arch/csky/annotate/instructions.c b/tools/perf/arch/csky/annotate/instructions.c
> new file mode 100644
> index 0000000..5337bfb
> --- /dev/null
> +++ b/tools/perf/arch/csky/annotate/instructions.c
> @@ -0,0 +1,48 @@
> +// SPDX-License-Identifier: GPL-2.0
> +// Copyright (C) 2019 Hangzhou C-SKY Microsystems co.,ltd.
> +
> +#include <linux/compiler.h>
> +
> +static struct ins_ops *csky__associate_ins_ops(struct arch *arch,
> +                                              const char *name)
> +{
> +       struct ins_ops *ops = NULL;
> +
> +       /* catch all kind of jumps */
> +       if (!strcmp(name, "bt") ||
> +           !strcmp(name, "bf") ||
> +           !strcmp(name, "bez") ||
> +           !strcmp(name, "bnez") ||
> +           !strcmp(name, "bnezad") ||
> +           !strcmp(name, "bhsz") ||
> +           !strcmp(name, "bhz") ||
> +           !strcmp(name, "blsz") ||
> +           !strcmp(name, "blz") ||
> +           !strcmp(name, "br") ||
> +           !strcmp(name, "jmpi") ||
> +           !strcmp(name, "jmp"))
> +               ops = &jump_ops;
> +
> +       /* catch function call */
> +       if (!strcmp(name, "bsr") ||
> +           !strcmp(name, "jsri") ||
> +           !strcmp(name, "jsr"))
> +               ops = &call_ops;
> +
> +       /* catch function return */
> +       if (!strcmp(name, "rts"))
> +               ops = &ret_ops;
> +
> +       if (ops)
> +               arch__associate_ins_ops(arch, name, ops);
> +       return ops;
> +}
> +
> +static int csky__annotate_init(struct arch *arch, char *cpuid __maybe_unused)
> +{
> +       arch->initialized = true;
> +       arch->objdump.comment_char = '/';
> +       arch->associate_instruction_ops = csky__associate_ins_ops;
> +
> +       return 0;
> +}
> diff --git a/tools/perf/util/annotate.c b/tools/perf/util/annotate.c
> index 79db038..eb2456e 100644
> --- a/tools/perf/util/annotate.c
> +++ b/tools/perf/util/annotate.c
> @@ -144,6 +144,7 @@ static int arch__associate_ins_ops(struct arch* arch, const char *name, struct i
>  #include "arch/arc/annotate/instructions.c"
>  #include "arch/arm/annotate/instructions.c"
>  #include "arch/arm64/annotate/instructions.c"
> +#include "arch/csky/annotate/instructions.c"
>  #include "arch/x86/annotate/instructions.c"
>  #include "arch/powerpc/annotate/instructions.c"
>  #include "arch/s390/annotate/instructions.c"
> @@ -163,6 +164,10 @@ static struct arch architectures[] = {
>                 .init = arm64__annotate_init,
>         },
>         {
> +               .name = "csky",
> +               .init = csky__annotate_init,
> +       },
> +       {
>                 .name = "x86",
>                 .init = x86__annotate_init,
>                 .instructions = x86__instructions,
> --
> 2.7.4
>


-- 
Best Regards
 Guo Ren

ML: https://lore.kernel.org/linux-csky/