On 12/17/2013 07:46 AM, Christian Weisgerber wrote:
Adam Jensen <han...@riseup.net> wrote:
I recently installed 5.4-stable on a machine with an intel graphics
device so I can tinker with the framebuffer console.
I notice that when running tmux on the console, output to the screen is
very sluggish and text seems to scroll with a wave-like effect.
The hardware acceleration for the framebuffer console on Intel
graphics went through several stages; from your report I guess that
5.4-release/stable is at one where only scrolling of the whole
screen is accelerated, but not that of a scrolling region.
In -current I don't see a slowdown in scrolling regions any longer.
This appears to have been silently (?) fixed.
Are you sure? We might be talking about different issues. I haven't
tinkered with 5.4-current so I can't verify whether or not the
framebuffer console behavior I've experienced has changed. A simple
experiment:
At the framebuffer console, login; change to a directory with many
files; measure the time of the directory listing.
# cd /usr/src/sys/arch/i386/compile/GENERIC.MP
# time ls
[...lots of output...]
0m0.29s real 0m0.00s user 0m0.22s system
Then start tmux in the simplest mode (one session, one window, no panes)
and do it again.
# tmux
# cd /usr/src/sys/arch/i386/compile/GENERIC.MP
# time ls
[...lots of output...]
0m33.19s real 0m0.01s user 0m0.01s system
If you do something like this on -current, what are your results?
