Kevin O'Connor wrote:
] Here seabios kconfig options I changed:
][...]
] ATA controllers n
] AHCI controllers y
] Floppy controllern
] PS/2 portn
] USB UHCI controllers
On Sat, Apr 30, 2011 at 10:37:09PM -0500, Scott Duplichan wrote:
Kevin O'Connor wrote:
] That's a great boot time! Do you have a breakdown of where the 640ms
] is spent?
I tried adding some serial logging to get an idea about where
the time is spent. The logging adds 8 ms to the boot time:
On Thu, Apr 28, 2011 at 10:01:50PM -0500, Scott Duplichan wrote:
The option is off by default because of side effects such as
long build time and unusable dwarf2 debug output. This
option cuts persimmon+seabios DOS boot from SSD time from
690 ms to 640 ms.
That's a great boot time! Do you
Kevin O'Connor wrote:
] That's a great boot time! Do you have a breakdown of where the 640ms
] is spent?
]
] -Kevin
Hello Kevin,
I tried adding some serial logging to get an idea about where
the time is spent. The logging adds 8 ms to the boot time:
Time in ms
0 cold reset
366memory
image size by removing unused functions and data. Reducing the
image size saves boot time by minimizing the flash memory read
It always made me wonder how DMA support for flash memory copy could improve
this. The SB700/SB800 has a support for that - it allows to copy the flash
memory using
Adds a kconfig option to enable gcc link time optimization.
Link time optimization reduces both rom stage and ram stage
image size by removing unused functions and data. Reducing the
image size saves boot time by minimizing the flash memory read
and decompress time for ram stage.
The option is
On 4/28/11 8:01 PM, Scott Duplichan wrote:
Adds a kconfig option to enable gcc link time optimization.
Link time optimization reduces both rom stage and ram stage
image size by removing unused functions and data. Reducing the
image size saves boot time by minimizing the flash memory read
and
Stefan Reinauer wrote:
] Did you do some size tests with non-AGESA targets?
The improvement for non-agesa-v5 projects is smaller.
Here are a couple of examples:
AMD Mahogany F10 standard -flto
fallback/romstage 74803 73004
fallback/coreboot_ram 55665 49928
Intel D945GCLF
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