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<div class="moz-cite-prefix">Hi Christophe,<br>
<br>
Do you know that by adding <b>"-mno-unaligned-access"</b>
flag into CFLAGS of MakeFile will decrease time to decompress
Image through QUIC method in our ARM based A20 SoC board? Does
that flag will impact anything from performance perspective?<br>
<br>
Please let me know if you have any idea for that.<br>
<pre class="moz-signature" cols="72">Regards,
Ritesh Prajapati,
System Level Solutions (India) Pvt.Ltd.
</pre>
On Monday 11 January 2016 03:50 PM, Christophe Fergeau wrote:<br>
</div>
<blockquote cite="mid:20160111102020.GW29984@edamame.cdg.redhat.com"
type="cite">
<pre wrap="">On Mon, Jan 11, 2016 at 09:44:38AM +0100, Pavel Grunt wrote:
</pre>
<blockquote type="cite">
<pre wrap="">On Mon, 2016-01-11 at 12:17 +0530, Ritesh Prajapati wrote:
</pre>
<blockquote type="cite">
<pre wrap="">I have also observed that SPICE Client is using QUIC Image
decompression method to uncompress compressed Image Frame.
So, Does anyone has idea or solution to decrease time in QUIC Image
De-compression Method or any alternative De-compression Method which
is faster than QUIC Mode?
</pre>
</blockquote>
<pre wrap="">
The fastest is without compression. You can try to change the
compression in the qemu commandline using image-
compression=[auto_glz|auto_lz|quic|glz|lz|off] and see what is the
fastest on A20.
e.g.:
qemu-kvm -spice port=5900,disable-ticketing,image-compression=off
Or if you use the latest spice server and spice-gtk you can change the
image-compression from the client using its '--spice-preferred-
compression'
</pre>
</blockquote>
<pre wrap="">
There has also been reports of unaligned memory accesses on ARM slowing
things down a lot, maybe you are hitting this as well.
See the "aspeed: video frames pass-through" thread from last October,
which turned into "demarshall: Add safe method for unaligned byte
access." in November.
Christophe
</pre>
</blockquote>
<br>
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