From: Simon Marchi <simon.marchi@polymtl.ca>
To: "Wiederhake, Tim" <tim.wiederhake@intel.com>
Cc: gdb-patches@sourceware.org, "Metzger,
Markus T" <markus.t.metzger@intel.com>
Subject: Re: [PATCH v3 10/12] btrace: Replace struct btrace_thread_info::segment.
Date: Wed, 10 May 2017 14:13:00 -0000 [thread overview]
Message-ID: <f8dc69c870c0a777f9b3a24d2513ae21@polymtl.ca> (raw)
In-Reply-To: <9676A094AF46E14E8265E7A3F4CCE9AF3C14CFE1@irsmsx105.ger.corp.intel.com>
On 2017-05-10 07:46, Wiederhake, Tim wrote:
>> Btw #2, I thing this function could be more efficient (or maybe I
>> don't
>> understand as well as I think). If bfun at function entry is in the
>> middle of a long list of segments, it will start from there and
>> iterate
>> backwards until it hits the first segment.
>
> Correct so far.
>
>> But because the same bfun
>> variable is reused, it will iterate forward from the start
>
> We saved PREV and NEXT beforehand and use BFUN as a temporary variable
> afterwards. The second "for" loop starts at NEXT, which is one past the
> original "middle of the long list of segments".
Ah, hence the need to save next before the first loop. For some reason
I thought the second loop was initialized from bfun. Sorry about that.
Simon
next prev parent reply other threads:[~2017-05-10 14:13 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-05-09 7:01 [PATCH v3 00/12] btrace: Turn linked list of function call segments into vector Tim Wiederhake
2017-05-09 7:01 ` [PATCH v3 11/12] btrace: Remove bfun_s vector Tim Wiederhake
2017-05-10 4:27 ` Simon Marchi
2017-05-10 11:46 ` Wiederhake, Tim
2017-05-09 7:01 ` [PATCH v3 06/12] btrace: Remove constant arguments Tim Wiederhake
2017-05-10 2:45 ` Simon Marchi
2017-05-10 11:46 ` Wiederhake, Tim
2017-05-09 7:01 ` [PATCH v3 08/12] btrace: Replace struct btrace_thread_info::up Tim Wiederhake
2017-05-10 3:26 ` Simon Marchi
2017-05-10 11:46 ` Wiederhake, Tim
2017-05-09 7:01 ` [PATCH v3 02/12] btrace: Transfer ownership of pointers Tim Wiederhake
2017-05-09 12:21 ` Simon Marchi
2017-05-09 7:01 ` [PATCH v3 09/12] btrace: Remove struct btrace_thread_info::flow Tim Wiederhake
2017-05-10 3:46 ` Simon Marchi
2017-05-10 11:46 ` Wiederhake, Tim
2017-05-10 13:59 ` Simon Marchi
2017-05-09 7:01 ` [PATCH v3 03/12] btrace: Add btinfo to instruction interator Tim Wiederhake
2017-05-09 7:01 ` [PATCH v3 05/12] btrace: Use function segment index in insn iterator Tim Wiederhake
2017-05-10 2:20 ` Simon Marchi
2017-05-10 11:46 ` Wiederhake, Tim
2017-05-09 7:01 ` [PATCH v3 07/12] btrace: Remove struct btrace_thread_info::{begin,end} Tim Wiederhake
2017-05-10 3:06 ` Simon Marchi
2017-05-09 7:01 ` [PATCH v3 01/12] btrace: Use std::vector in struct btrace_thread_information Tim Wiederhake
2017-05-09 12:10 ` Simon Marchi
2017-05-09 7:01 ` [PATCH v3 10/12] btrace: Replace struct btrace_thread_info::segment Tim Wiederhake
2017-05-10 4:14 ` Simon Marchi
2017-05-10 11:46 ` Wiederhake, Tim
2017-05-10 14:13 ` Simon Marchi [this message]
2017-05-09 7:01 ` [PATCH v3 04/12] btrace: Use function segment index in call iterator Tim Wiederhake
2017-05-09 12:50 ` Simon Marchi
2017-05-09 13:14 ` Wiederhake, Tim
2017-05-09 14:29 ` Simon Marchi
2017-05-09 7:01 ` [PATCH v3 12/12] btrace: Store function segments as objects Tim Wiederhake
2017-05-10 5:10 ` Simon Marchi
2017-05-10 11:46 ` Wiederhake, Tim
2017-05-10 14:16 ` Simon Marchi
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