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

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Date:   Thu, 1 Feb 2018 11:10:35 -0800
From:   Frank Rowand <frowand.list@...il.com>
To:     Chintan Pandya <cpandya@...eaurora.org>,
        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 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?

Thanks,

Frank