linux-kernel - Re: [PATCH v2 3/5] perf diff: generalize hpp__color

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Date:	Wed, 27 Nov 2013 16:32:17 +0530
From:	Ramkumar Ramachandra <artagnon@...il.com>
To:	Jiri Olsa <jolsa@...hat.com>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	Namhyung Kim <namhyung@...nel.org>
Subject: Re: [PATCH v2 3/5] perf diff: generalize hpp__color_delta for -c

Ramkumar Ramachandra wrote:
> Jiri Olsa wrote:
>>>       if (!pair)
>>>               goto dummy_print;
>>>       if (pair->diff.computed)
>>> -             percent = pair->diff.period_ratio_delta;
>>> +             switch (comparison_method) {
>>> +             case COMPUTE_DELTA:
>>> +                     delta = pair->diff.period_ratio_delta;
>>> +                     break;
>>> +             default:
>>> +                     BUG_ON(1);
>>> +             }
>>>       else
>>> -             percent = compute_delta(he, pair);
>>> +             switch (comparison_method) {
>>> +             case COMPUTE_DELTA:
>>> +                     delta = compute_delta(he, pair);
>>> +                     break;
>>> +             default:
>>> +                     BUG_ON(1);
>>> +             }
>>>
>>> -     if (!he->dummy && fabs(percent) >= 0.01) {
>>> -             scnprintf(pfmt, 20, "%%%+d.2f%%%%", dfmt->header_width - 1);
>>> -             return color_snprintf(hpp->buf, hpp->size,
>>> -                             percent > 0 ? PERF_COLOR_GREEN : PERF_COLOR_RED,
>>> -                             pfmt, percent);
>>> +     if (!he->dummy) {
>>
>> isn't this check superfluous because of the above (!pair) check?
>
> From builtin-diff.c:get_pair_data(), we see that `pair' is one of the
> pairs in he->pairs. he->dummy is set in
> util/hist.c:hists__add_dummy_entry() which is called only when he
> doesn't have pairs (util/hist.c:942).

Sorry about the major thinko: hists__add_dummy_entry() returns a new
`he' with he->dummy set; it has nothing to do with pair->pairs of the
`pair' that it is passed.

I think I understand what's going on: I'll submit a new iteration soon.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/