linux-kernel - Re: [PATCH] of: cache phandle nodes to decrease cost of of_find_node_by

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

Date:   Fri, 2 Feb 2018 11:29:16 +0530
From:   Chintan Pandya <cpandya@...eaurora.org>
To:     Frank Rowand <frowand.list@...il.com>,
        Rob Herring <robh+dt@...nel.org>
Cc:     devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] of: cache phandle nodes to decrease cost of
 of_find_node_by_phandle()



On 2/2/2018 12:40 AM, Frank Rowand wrote:
> On 02/01/18 02:31, Chintan Pandya wrote:
>>
>>>> Anyways, will fix this locally and share test results.
>>>
>>> Thanks, I look forward to the results.
>>>
>>
>> Set up for this time was slightly different. So, taken all the numbers again.
>>
>> Boot to shell time (in ms): Experiment 2
>> [1] Base            : 14.843805 14.784842 14.842338
>> [2] 64 sized fixed cache    : 14.189292 14.200003 14.266711
>> [3] Dynamic freeable cache    : 14.112412 14.064772 14.036052
>>
>> So, [3] (this patch) looks to be improving 750ms (on avg from base build).
>>
> 
> Is this with the many debug options enabled?  If so, can you repeat with
> a normal configuration?

Could you share me the point of doing this experiment in perf mode ? I 
don't have a set up for taking these numbers in perf mode. For that, I 
need to ask some other team and round trip follow ups. In my set up, I 
rely on serial console logging which gets disabled in perf mode.

> 
> Thanks,
> 
> Frank
> 

Chintan
-- 
Qualcom India Private Limited, on behalf of Qualcomm Innovation Center,
Inc. is a member of the Code Aurora Forum, a Linux Foundation
Collaborative Project