linux-kernel - Re: [PATCH] perf annotate: Remove precision for mnemonics

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Message-ID: <20171114130427.GK8836@kernel.org>
Date:   Tue, 14 Nov 2017 10:04:27 -0300
From:   Arnaldo Carvalho de Melo <acme@...nel.org>
To:     Ravi Bangoria <ravi.bangoria@...ux.vnet.ibm.com>
Cc:     peterz@...radead.org, mingo@...hat.com,
        alexander.shishkin@...ux.intel.com, jolsa@...hat.com,
        namhyung@...nel.org, treeze.taeung@...il.com,
        linux-kernel@...r.kernel.org, dstence@...ibm.com
Subject: Re: [PATCH] perf annotate: Remove precision for mnemonics

Em Tue, Nov 14, 2017 at 08:55:40AM +0530, Ravi Bangoria escreveu:
> There are many instructions, esp on powerpc, whose mnemonics are
> longer than 6 characters. Using precision limit causes truncation
> of such mnemonics.
> 
> Fix this by removing precision limit. Note that, 'width' is still
> 6, so alignment won't get affected for length <= 6.
> 
> Before:
> 
>    li     r11,-1
>    xscvdp vs1,vs1
>    add.   r10,r10,r11
> 
> After:
> 
>   li     r11,-1
>   xscvdpsxds vs1,vs1
>   add.   r10,r10,r11

Ok, this improves the situation, as we stop truncating info, but I think
that we should look for the longest instruction name and then use that
to align the operands, will add that to my todo list if nobody does it
first :-)

Thanks, applied.

- Arnaldo
 
> Reported-by: Donald Stence <dstence@...ibm.com>
> Signed-off-by: Ravi Bangoria <ravi.bangoria@...ux.vnet.ibm.com>
> ---
>  tools/perf/util/annotate.c | 18 +++++++++---------
>  1 file changed, 9 insertions(+), 9 deletions(-)
> 
> diff --git a/tools/perf/util/annotate.c b/tools/perf/util/annotate.c
> index 54321b947de8..6462a7423beb 100644
> --- a/tools/perf/util/annotate.c
> +++ b/tools/perf/util/annotate.c
> @@ -165,7 +165,7 @@ static void ins__delete(struct ins_operands *ops)
>  static int ins__raw_scnprintf(struct ins *ins, char *bf, size_t size,
>  			      struct ins_operands *ops)
>  {
> -	return scnprintf(bf, size, "%-6.6s %s", ins->name, ops->raw);
> +	return scnprintf(bf, size, "%-6s %s", ins->name, ops->raw);
>  }
>  
>  int ins__scnprintf(struct ins *ins, char *bf, size_t size,
> @@ -230,12 +230,12 @@ static int call__scnprintf(struct ins *ins, char *bf, size_t size,
>  			   struct ins_operands *ops)
>  {
>  	if (ops->target.name)
> -		return scnprintf(bf, size, "%-6.6s %s", ins->name, ops->target.name);
> +		return scnprintf(bf, size, "%-6s %s", ins->name, ops->target.name);
>  
>  	if (ops->target.addr == 0)
>  		return ins__raw_scnprintf(ins, bf, size, ops);
>  
> -	return scnprintf(bf, size, "%-6.6s *%" PRIx64, ins->name, ops->target.addr);
> +	return scnprintf(bf, size, "%-6s *%" PRIx64, ins->name, ops->target.addr);
>  }
>  
>  static struct ins_ops call_ops = {
> @@ -299,7 +299,7 @@ static int jump__scnprintf(struct ins *ins, char *bf, size_t size,
>  			c++;
>  	}
>  
> -	return scnprintf(bf, size, "%-6.6s %.*s%" PRIx64,
> +	return scnprintf(bf, size, "%-6s %.*s%" PRIx64,
>  			 ins->name, c ? c - ops->raw : 0, ops->raw,
>  			 ops->target.offset);
>  }
> @@ -372,7 +372,7 @@ static int lock__scnprintf(struct ins *ins, char *bf, size_t size,
>  	if (ops->locked.ins.ops == NULL)
>  		return ins__raw_scnprintf(ins, bf, size, ops);
>  
> -	printed = scnprintf(bf, size, "%-6.6s ", ins->name);
> +	printed = scnprintf(bf, size, "%-6s ", ins->name);
>  	return printed + ins__scnprintf(&ops->locked.ins, bf + printed,
>  					size - printed, ops->locked.ops);
>  }
> @@ -448,7 +448,7 @@ static int mov__parse(struct arch *arch, struct ins_operands *ops, struct map *m
>  static int mov__scnprintf(struct ins *ins, char *bf, size_t size,
>  			   struct ins_operands *ops)
>  {
> -	return scnprintf(bf, size, "%-6.6s %s,%s", ins->name,
> +	return scnprintf(bf, size, "%-6s %s,%s", ins->name,
>  			 ops->source.name ?: ops->source.raw,
>  			 ops->target.name ?: ops->target.raw);
>  }
> @@ -488,7 +488,7 @@ static int dec__parse(struct arch *arch __maybe_unused, struct ins_operands *ops
>  static int dec__scnprintf(struct ins *ins, char *bf, size_t size,
>  			   struct ins_operands *ops)
>  {
> -	return scnprintf(bf, size, "%-6.6s %s", ins->name,
> +	return scnprintf(bf, size, "%-6s %s", ins->name,
>  			 ops->target.name ?: ops->target.raw);
>  }
>  
> @@ -500,7 +500,7 @@ static struct ins_ops dec_ops = {
>  static int nop__scnprintf(struct ins *ins __maybe_unused, char *bf, size_t size,
>  			  struct ins_operands *ops __maybe_unused)
>  {
> -	return scnprintf(bf, size, "%-6.6s", "nop");
> +	return scnprintf(bf, size, "%-6s", "nop");
>  }
>  
>  static struct ins_ops nop_ops = {
> @@ -990,7 +990,7 @@ void disasm_line__free(struct disasm_line *dl)
>  int disasm_line__scnprintf(struct disasm_line *dl, char *bf, size_t size, bool raw)
>  {
>  	if (raw || !dl->ins.ops)
> -		return scnprintf(bf, size, "%-6.6s %s", dl->ins.name, dl->ops.raw);
> +		return scnprintf(bf, size, "%-6s %s", dl->ins.name, dl->ops.raw);
>  
>  	return ins__scnprintf(&dl->ins, bf, size, &dl->ops);
>  }
> -- 
> 2.13.6