Hi,
On Tue Mar 18, 2025 at 10:11:54 +0000, Eric Miniere via l4-hackers wrote:
I am looking for an estimate of the memory footprint to run the hypervisor L4RE on a quad Core ARM Cortex R52. Does it run directly from flash or it needs to be copied to run in RAM ? same question for Guests OS (ie FreeRtos)?
It can also run from flash. A guest as well I believe, but we never tried I think.
What could be the minimal needed L4RE footprint for code and data ?
Depends on the config of course. Last time we checked, a config for 16VMs was around 400k. We're constantly trying to improve here. For the ratio between code/data I do not have numbers at hand but a good part is code that could/would be running off flash.
Also if someone could share a rough idea of scheduling time for an ARM R52 running at 400Mhz ? or nb of cycle it takes to schedule ?
On a Cortex-A53 (in-order) we're short over 2000 cycles in the measurements for a timer interrupt triggered switch, which would translate to 5µs at 400MHz. If VMs would be involved a little bit more because of the added state to swtich. I'd assume it would be in similar range on R52.
Adam _______________________________________________ l4-hackers mailing list -- l4-hackers@os.inf.tu-dresden.de To unsubscribe send an email to l4-hackers-leave@os.inf.tu-dresden.de