See following attachments which contains some results of 4 commands executed in same Lava job or without Lava

Each test takes around 3/4 minutes.
Is it some periodically action from LAVA to check if DUT is always available (ping/ssh ... ) which can explain these differences of results ?

Florence

-----Original Message-----
From: Steve McIntyre [mailto:steve.mcintyre@linaro.org]
Sent: vendredi 26 janvier 2018 15:14
To: Florence ROUGER JUNG <florence.rouger-jung@st.com>
Cc: Remi Duraffort <remi.duraffort@linaro.org>; Neil Williams <neil.williams@linaro.org>; lava-users@lists.linaro.org
Subject: Re: [Lava-users] IOZone test to measure performance of DUT

On Fri, Jan 26, 2018 at 02:04:52PM +0000, Florence ROUGER JUNG wrote:
>That's right, at first I used following command  and there was some output  to the terminal
>       iozone $OPT -f /mnt_emmc/tmp/iozone.tmp | tee result.log
>
>But now I redirect output
>       iozone $OPT -f /mnt_emmc/tmp/iozone.tmp > iozone.log 2>&1 performance
>are better but remain not homogeneous with Lava

OK, that does surprise me. I could imagine that running a test with lots of output to the serial port could slow things down, but if you're redirecting everything then it should be making no difference at all. What kind of variance are you seeing?

>
Cheers,
--
Steve McIntyre                                steve.mcintyre@linaro.org
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