Interesting thought!
I run SRSS 4.2 on SXCE build 127.
I notice some performance difference between SR 170, SR 270 and the SR 2 FS.
The 2 FS works like a charm even video is handled pretty well.
The 270 works fine but noticeably slower when dragging windows and playing video.
The 170 has a blocky screen build up and is the slowest of the three.
I thought it had to do something with de X extentions which are better supported on faster hardware like the 270 and 2 FS. But I can not remember the 170 being this slow with setups I used in the past. If the 170 is forced in a low bandwidth mode I am sure interested in changing this.

Kind regards,

Ivar

Marty Scholes schreef:
Bob Doolittle wrote:
It might be a bit before we can get to any deep-dives regarding performance on OSol. We will get there and appreciate your patience. Please test with 4.2!
I am going to revive this thread a little. Since I last wrote, I replace my feeble server with a more robust 4 way v40z last week.

I have CPU cycles, network bandwidth and memory to burn.  We have noticed some 
odd behavior with the DTUs.

Initially, things were not much better, the managed switches showed very low 
network utilization on the DTU ports and server CPU utilization was nigh-zero.

After a few days of uptime, one or two of the heads on the triple head displays 
started refreshing very quickly, and those ports on the switches showed much 
higher, ~50%, link utilization.

Sometimes the heads would revert to slow refreshes.  I haven't figured out the 
pattern of when they will behave a certain way.

There appears to be two refresh modes:
1. Low bandwidth refresh which is slow and updates blocks across the screen top 
to bottom and left to right within each row, taking more than a second.  This 
makes scrolling in a browser/PDF/OO Document/gnome-terminal/etc. a painful task.
2. High bandwidth refresh which is fast and consumes the ethernet link, 
smoothly refreshing the whole screen in less than half a second.

I seem to recall that 4.1 ran in "high bandwidth" mode quite often but 4.2 
prefers the slower mode.  Changing the DTU to the 4.1 firmware had no effect, so I can 
only assume it is SRSS which is making these decisions.

Assuming (naive, I know) that this is how SRSS operates, is there a way to coax it into 
the "high bandwidth" mode permanently?

Many thanks,
Marty
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