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0 pointsbayindirh1y ago0 comments

Use a proper RTOS kernel with a good UI layer, and see all the developers complain loudly because they can't use the latest mobile phone stacks on that robust platform.

Sony boots a RTOS Linux system on their cameras in 3 seconds flat, and the firmware is arguably mission critical for that camera. It can be done for an infotainment system.

0 comments

throwanem1y ago

Three seconds is a long time. What's it doing to justify that lag? Or is there some kind of cold/warm boot distinction?

bayindirhOP1y ago

The booting process is dominated by checking SteadyShot's state (move sensor a bit, center and lock).

However, you don't notice that three seconds. Because when you flick the switch and raise the camera, and it's already ready to shoot.

There's powersave after a minute (configurable), which can be considered as S3 sleep, and returning from that is faster.

throwanem1y ago

Seems complicated. IBIS would be nice to have, but the two stops or so I get from my lenses' stabilizers usually works out to be enough.

1 more reply

nyarlathotep_1y ago

> Sony boots a RTOS Linux system on their cameras in 3 seconds flat, and the firmware is arguably mission critical for that camera. It can be done for an infotainment system.

Is stuff like this documented anywhere? This is one software topic I find endlessly fascinating but can't find any resources on.

j / k navigate · click thread line to collapse

0 comments

throwanem1y ago

Three seconds is a long time. What's it doing to justify that lag? Or is there some kind of cold/warm boot distinction?

bayindirhOP1y ago

The booting process is dominated by checking SteadyShot's state (move sensor a bit, center and lock).

However, you don't notice that three seconds. Because when you flick the switch and raise the camera, and it's already ready to shoot.

There's powersave after a minute (configurable), which can be considered as S3 sleep, and returning from that is faster.

throwanem1y ago

Seems complicated. IBIS would be nice to have, but the two stops or so I get from my lenses' stabilizers usually works out to be enough.

1 more reply

nyarlathotep_1y ago

> Sony boots a RTOS Linux system on their cameras in 3 seconds flat, and the firmware is arguably mission critical for that camera. It can be done for an infotainment system.

Is stuff like this documented anywhere? This is one software topic I find endlessly fascinating but can't find any resources on.

j / k navigate · click thread line to collapse