[coreboot] coreboot 4.4 testing / boot time regression on google/panther
Matt DeVillier
matt.devillier at gmail.com
Mon Apr 18 14:56:19 CEST 2016
bah, nevermind - seems that there was one config difference which was
responsible for the problem (CONFIG_DRIVERS_UART_8250IO being set vs
unset). Carry on with the 4.4 release :)
On 4/18/2016 1:32 AM, Matt DeVillier wrote:
> Greetings,
>
> prompted by another posting on the topic, I also noticed a significant
> degradation in boot time on google/panther (Asus Chromebox / Haswell
> mobile) . I haven't had a chance to bisect commits yet, but did test
> a few older firmware builds to confirm my suspicion. Below are cbmem
> timestamps from current ToT (2016-04-17) as well as one of my older
> builds (2015-10-15). I don't recall any config changes between the
> two, but will extract the configs to compare shortly - I just wanted
> to get this email out before it slipped my mind (again)
>
> cheers,
> Matt
>
> 2016-04-17:
>
> 20 entries total:
>
> 0:1st timestamp 9,347
> 1:start of rom stage 90,188 (80,840)
> 2:before ram initialization 114,963 (24,774)
> 3:after ram initialization 310,446 (195,482)
> 4:end of romstage 370,484 (60,038)
> 8:starting to load ramstage 384,426 (13,941)
> 15:starting LZMA decompress (ignore for x86) 390,377 (5,951)
> 16:finished LZMA decompress (ignore for x86) 417,628 (27,250)
> 9:finished loading ramstage 430,016 (12,387)
> 10:start of ramstage 440,820 (10,804)
> 30:device enumeration 446,586 (5,765)
> 40:device configuration 703,927 (257,340)
> 50:device enable 1,084,974
> (381,046)
> 60:device initialization 1,180,544 (95,570)
> 70:device setup done 1,840,066
> (659,522)
> 75:cbmem post 1,844,931 (4,864)
> 80:write tables 1,877,301 (32,370)
> 90:load payload 2,347,005
> (469,704)
> 15:starting LZMA decompress (ignore for x86) 2,402,510 (55,504)
> 16:finished LZMA decompress (ignore for x86) 2,418,100 (15,589)
> 99:selfboot jump 2,438,022 (19,922)
>
> Total Time: 2,428,663
>
> 2015-10-15:
>
> 20 entries total:
>
> 0:1st timestamp 9,180
> 1:start of rom stage 103,887 (94,707)
> 2:before ram initialization 105,073 (1,185)
> 3:after ram initialization 149,422 (44,349)
> 4:end of romstage 152,822 (3,400)
> 8:starting to load ramstage 155,245 (2,423)
> 15:starting LZMA decompress (ignore for x86) 155,576 (330)
> 16:finished LZMA decompress (ignore for x86) 198,752 (43,176)
> 9:finished loading ramstage 200,077 (1,325)
> 10:start of ramstage 201,218 (1,140)
> 30:device enumeration 201,251 (33)
> 40:device configuration 205,820 (4,568)
> 50:device enable 207,904 (2,084)
> 60:device initialization 208,257 (352)
> 70:device setup done 231,943 (23,686)
> 75:cbmem post 231,956 (13)
> 80:write tables 236,907 (4,950)
> 90:load payload 240,268 (3,361)
> 15:starting LZMA decompress (ignore for x86) 240,436 (167)
> 16:finished LZMA decompress (ignore for x86) 255,986 (15,550)
> 99:selfboot jump 524,459 (268,473)
>
> Total Time: 515,272
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