Messages in this thread | | | Date | Fri, 3 Dec 1999 09:15:50 -0500 (EST) | From | William Montgomery <> | Subject | Re: lowlatency-2.2.13-A1 questions |
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On Fri, 3 Dec 1999, Ingo Molnar wrote: > yes - this was one reason why i didnt announce the 2.2.13 patch. The merge > should be more or less straightforward. Also the fbcon drivers have to be > changed as well to compile. >
You mentioned that the console changes were not forward ported from lowlatency-2.2.10-N6B to lowlatency-2.2.13-A1. After a few diffs, it appears that all console changes _are_ ported with the exception of the /drivers/char/pc_keyb.c changes. I am now exercising X on the console and I notice a 5msec latency when I switch to a virtual terminal then back to X, the kernel functions responsible are the delays in pc_keyb.c with respect to psaux mouse init.
I applied the 2.2.10-N6B pc_keyb.c changes and the problem shifted to a new group of functions: 3887204.62 0.15 detect_auxiliary_port pid(113) 3887204.78 0.13 kb_wait pid(113) 3887204.90 3.33 pckbd_unexpected_up pid(113) 3887208.23 0.13 kb_wait pid(113) 3887208.36 1.62 pckbd_unexpected_up pid(113) 3887209.98 0.13 __down_failed_trylock pid(113) 3887210.10 996.07 csum_partial_copy pid(113) 3888206.18 1.51 pckbd_unexpected_up pid(113) 3888207.69 0.13 __down_failed_trylock pid(113) 3888207.82 996.07 csum_partial_copy pid(113) 3889203.89 1.60 pckbd_unexpected_up pid(113) 3889205.50 0.13 __down_failed_trylock pid(113) 3889205.63 996.07 csum_partial_copy pid(113)
The "csum_partial_copy" now looks suspect. I'm not sure if this happened in 2.2.10? Did I break something?
I am using the vga console instead of the frame buffer stuff so I didnt have to do anything for the fbcon drivers.
Wm
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