On Mon, Jan 11, 2016 at 09:44:38AM +0100, Pavel Grunt wrote: > On Mon, 2016-01-11 at 12:17 +0530, Ritesh Prajapati wrote: > > 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? > > 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' 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
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