From mboxrd@z Thu Jan  1 00:00:00 1970
From: Marek Vasut <marek.vasut@gmail.com>
Date: Wed, 16 Oct 2019 19:02:01 +0200
Subject: [U-Boot] [PATCH] lib: time: Add microsecond timer
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On 10/16/19 6:58 PM, Simon Glass wrote:
[...]
>>> Have you tried bootstage?
>>
>> What for ? I need to debug the EHCI driver performance across the EHCI
>> driver and USB storage implementation. Bootstage is not helpful here.
> 
> It can track the time spent in particular parts of the code,
> accumulating it over multiple calls, etc. E.g. how much is FS, how
> much is driver, how much is waiting for replies...

And how much overhead does it add compared to calling get_timer{,_us}()
directly ? It was about uSecs in this case, so this was the best approach.

-- 
Best regards,
Marek Vasut