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<dshankar>
looks while messing with aptitude i broke everything :-) it's now just a console boot.
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<JBD1986>
all, is there a list of required defconfig/.config items for the vivante drivers to work properly?
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<jas-hacks>
JBD1986: I tested on the debian rootfs again, I don't see any issues while dragging a windows around. The only issue I'm seeing is when a window is resized there a delay repainted and the CPU jumps to 60 %.
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<JBD1986>
jas-hacks, when you very rapidly move a window up and down on top of the desktop icons, do the desktop icons redraw instantly, or is there a delay?
<jas-hacks>
JBD1986: icon or any windows behind is drawn instantly
<JBD1986>
that sounds like my performance with compositing enabled
<JBD1986>
but with compositing disabled, redraw is much faster, and moving is slow, and redraw of icons is delayed
<JBD1986>
sorry resize is much faster
<JBD1986>
not redraw
<JBD1986>
compositing= fast window move, fast icon redraw, SUPER slow resizing
<JBD1986>
no compositing= laggy window movement, slow icon redraw. Window resize is reasonable, but still not great
<jas-hacks>
yes that matches
<JBD1986>
wait, so if you turn off compositing, your window movement is laggy?
<JBD1986>
and icon redraw is laggy?
<jas-hacks>
yes it is not as smooth with it off, which makes sense compositing should improve how the window stack is handled
<JBD1986>
jas-hacks, I thought you had compositing disabled and did not experience window moving lag?
<JBD1986>
high cpu utilization of xorg
<jas-hacks>
with or without it compositing I have issues with window moving lag
<jas-hacks>
/s/issues/no issues
<JBD1986>
jas-hacks, so with compositing disabled, you can wildly drag the window around the screen, and icons refresh properly, and the window is not lagging behind your mouse?
<jas-hacks>
the only symptom is slow icon redraw
<WarheadsSE>
hmm
<jas-hacks>
JBD1986: looks like it is because no h/w acceleration is used for icon/windows in the background because they aren't in off screen memory
<JBD1986>
jas-hacks, but there is 0 lag when dragging windows with compositing off, while moving a large window rapidly?
<JBD1986>
in terms of the window following your mouse
<JBD1986>
?
<jas-hacks>
I don't see that
<JBD1986>
jas-hacks, and cpu usage stays normal for xorg?
<JBD1986>
i.e. less than 50% of a single core?
<jas-hacks>
it only goes up if I wildly drag the window but thats to be expected
<newell>
Anyone in here ever use the global timer for the i.MX6?
<jas-hacks>
newell: I haven't
<JBD1986>
jas-hacks, does the issue get noticeably worse if the window takes up a large portion of the screen?
<JBD1986>
jas-hacks, simply moving a large window from the bottom right corner to the top left corner of my screen has a noticeable lag
<newell>
jas-hacks, have you used any of the timers on the i.MX6? We are trying to use one of the timers for a 125 microsecond interrupt to measure the interrupt latency of the system.
<newell>
I am getting hung up on how exactly to go about doing that
<newell>
We want to isolate one of the cores as well...uncertain on how I would do that as well.
<jas-hacks>
newell: nothing in the SDK?
<newell>
Those are baremetal programs...and we would like to use this within Linux
<jas-hacks>
JBD1986: I don't see much difference
<newell>
So I am thinking I will need to write a Linux kernel driver to do this just uncertain of how to go about it.