[Lava-users] Boot time measurement with Lava

Milosz Wasilewski milosz.wasilewski at linaro.org
Wed Aug 22 08:46:54 UTC 2018


On 22 August 2018 at 08:02, Denis HUMEAU <denis.humeau at st.com> wrote:
> Thanks Milosz,
>
> Do you have any idea on how intrusive Lava is on such boot processes? Based on what I see, without any further analysis, boot time is much higher when measured inside Lava. In my example, I measure Linux + Userland boot time, and I get about 20s more using Lava.
> As I said, I haven't analyzed yet.

I'm suffering from the same problem. The time recorded in
auto-login-action might be affected by some actions LAVA performs on
serial. Recently there was 'kernel-messages' test result introduced.
It might give better match. But I guess we'll need to wait for some
core LAVA folks to comment.

milosz

>
> But, globally speaking, we have noticed so far that time measurements, benchmarkings, when performed via Lava, produce results significantly different than when performed outside Lava. Boot time is the latest example. I wonder if it is due to Lava (Lava may not be designed for this), or maybe is it due to our setup.
>
> Regards,
>
> Denis
> -----Original Message-----
> From: Milosz Wasilewski <milosz.wasilewski at linaro.org>
> Sent: mardi 21 août 2018 11:58
> To: Denis HUMEAU <denis.humeau at st.com>
> Cc: lava-users at lists.linaro.org
> Subject: Re: [Lava-users] Boot time measurement with Lava
>
> On 21 August 2018 at 10:56, Denis HUMEAU <denis.humeau at st.com> wrote:
>> Hello Lava users,
>>
>>
>>
>> Do you have any example or advice to share on a way to measure boot
>> time using Lava?
>>
>> Let’s say that I use u-boot, a minimal boot for a device running
>> Linux, and I want to measure the time spent between Power On
>> (pdu-reboot e.g) and Linux prompt.
>
> You can find it in the 'lava' suite results as 'auto-login-action'. It has a measurement which is roughly what you expect.
>
> milosz
>
>>
>>
>>
>> Best regards,
>>
>>
>>
>> Denis
>>
>>
>>
>>
>> _______________________________________________
>> Lava-users mailing list
>> Lava-users at lists.linaro.org
>> https://lists.linaro.org/mailman/listinfo/lava-users
>>


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