21 Dec
2016
21 Dec
'16
3:44 p.m.
https://bugs.freedesktop.org/show_bug.cgi?id=99130
--- Comment #14 from Dorota Czaplejewicz dorota.czaplejewicz@collabora.co.uk --- # cat /proc/consoles tty0 -WU (EC p ) 4:1
Upon further digging, the slow stack *seems* like this (may be wrong, the tracing tool is less useful with huge numbers of calls):
console_unlock() call_console_drivers.isra.0.constprop.15() vt_console_print() lf() scrup() fbcon_scroll() fbcon_cursor() fbcon_redraw.isra.17()
Inside of this, the delay is split up among many shorter calls, most time occupied by fbcon_putcs -> bit_putcs -> cfb_imageblit.
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