Thread (21 messages) 21 messages, 3 authors, 2018-02-07

Re: [PATCH] of: cache phandle nodes to decrease cost of of_find_node_by_phandle()

From: Chintan Pandya <hidden>
Date: 2018-02-02 05:59:29
Also in: lkml


On 2/2/2018 12:40 AM, Frank Rowand wrote:
On 02/01/18 02:31, Chintan Pandya wrote:
quoted
quoted
quoted
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
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