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From: Arnaldo Carvalho de Melo <acme-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
To: Jiri Olsa <jolsa-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
Cc: Joe Mario <jmario-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>,
	dwarves-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: Re: [PATCH 1/3] dwarves print: Fix holes accounting
Date: Wed, 16 Dec 2015 14:58:39 -0300
Message-ID: <20151216175839.GB6843@kernel.org> (raw)
In-Reply-To: <1449614826-2278-2-git-send-email-jolsa-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>

Em Tue, Dec 08, 2015 at 11:47:04PM +0100, Jiri Olsa escreveu:
> Sometimes the hole could be missing, try to bypass
> this issue by comparing last and current offsets.

Can you provide an example of before and after this change? What real
case triggered this?

- Arnaldo
 
> Signed-off-by: Jiri Olsa <jolsa-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
> ---
>  dwarves_fprintf.c | 11 +++++++++++
>  1 file changed, 11 insertions(+)
> 
> diff --git a/dwarves_fprintf.c b/dwarves_fprintf.c
> index 71d8ce9f982b..df80af255c67 100644
> --- a/dwarves_fprintf.c
> +++ b/dwarves_fprintf.c
> @@ -1268,6 +1268,17 @@ size_t class__fprintf(struct class *class, const struct cu *cu,
>  		}
>  		pos = tag__class_member(tag_pos);
>  
> +		/*
> +		 * Sometimes the hole could be missing, try to bypass
> +		 * this issue by comparing last and current offsets.
> +		 */
> +		if (last) {
> +			uint32_t tmp = last->byte_offset + last->byte_size + last->hole;
> +
> +			if (pos->byte_offset > tmp)
> +				sum_holes += pos->byte_offset - tmp;
> +		}
> +
>  		if (last != NULL &&
>  		    pos->byte_offset != last->byte_offset &&
>  		    !cconf.suppress_comments)
> -- 
> 2.4.3
> 
> --
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  parent reply index

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-12-08 22:47 [RFC/PATCH 0/3] dwarves print: Cacheline accounting fixes Jiri Olsa
     [not found] ` <1449614826-2278-1-git-send-email-jolsa-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
2015-12-08 22:47   ` [PATCH 1/3] dwarves print: Fix holes accounting Jiri Olsa
     [not found]     ` <1449614826-2278-2-git-send-email-jolsa-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
2015-12-16 17:58       ` Arnaldo Carvalho de Melo [this message]
     [not found]         ` <20151216175839.GB6843-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
2015-12-16 18:05           ` Arnaldo Carvalho de Melo
     [not found]             ` <20151216180532.GD6843-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
2015-12-16 18:10               ` Arnaldo Carvalho de Melo
2015-12-08 22:47   ` [PATCH 2/3] dwarves print: Pass into struct conf_fprintf class__fprintf_cacheline_boundary Jiri Olsa
     [not found]     ` <1449614826-2278-3-git-send-email-jolsa-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
2015-12-16 18:00       ` Arnaldo Carvalho de Melo
     [not found]         ` <20151216180017.GC6843-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
2015-12-17  9:17           ` Jiri Olsa
2015-12-08 22:47   ` [PATCH 3/3] dwarves print: Keep global cacheline in struct conf_fprintf Jiri Olsa
     [not found]     ` <1449614826-2278-4-git-send-email-jolsa-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
2015-12-16 18:29       ` Arnaldo Carvalho de Melo
2015-12-16 16:57   ` [RFC/PATCH 0/3] dwarves print: Cacheline accounting fixes Jiri Olsa

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