OK Greg,
could be that I was using too much.. using 64KB of ramdisk also.. I
disabled some of the comfortable features like cmd line history etc,
and was already able to alloc quite a bit more than before..
Will further improve the sram usage..
Also, I missed the commit
mm/mm_heap: fix mm_heap not support BUILD_FLAT
GUIDINGLI
authored and patacongo
committed
on Apr 10
which well might impact my stuff here, will pull and let you know,
@Nathan I will also make tests if malloc continues returning non NULL
pointers even if out of memory..
Seems on a good way!!
Many thanks,
Florian
--
Florian Wehmeyer
TFW Tech-Solutions
On Seg, 2020-05-11 at 15:09 -0600, Gregory Nutt wrote:
> >
> >
> > >
> > > No custom board, it's the tm4c1294-launchpad.
> > > Seems no general problem with heap allocation, so I guess it's
> > > not in
> > > the linker script, it's rather directly linked to the usage of
> > > the elf-
> > > binary loader, and there are only two configs in the nuttx repo
> > > which
> > > use the CONFIG_ELF stuff.
> > That part has 256Kb of SRAM. That is more that many, but it could
> > be
> > that you are using too much SRAM and just cannot run ELF reliably.
> > It
> > does want a lot of SRAM.
> Most of the other boards that use CONFIG_ELF=y in a configuration
> have a
> much larger internal ram (exceptions in red):
>
> $ find . -name defconfig | xargs grep -l CONFIG_ELF=y | xargs grep
> RAM_SIZE
> ./arm/cxd56xx/spresense/configs/elf/defconfig:CONFIG_RAM_SIZE=1572864
> ./arm/cxd56xx/spresense/configs/module/defconfig:CONFIG_RAM_SIZE=1572
> 864
> ./arm/cxd56xx/spresense/configs/posix_spawn/defconfig:CONFIG_RAM_SIZE
> =1572864
> ./arm/cxd56xx/spresense/configs/rndis/defconfig:CONFIG_RAM_SIZE=15728
> 64
> ./arm/cxd56xx/spresense/configs/wifi/defconfig:CONFIG_RAM_SIZE=157286
> 4
> ./arm/lc823450/lc823450-
> xgevk/configs/elf/defconfig:CONFIG_RAM_SIZE=1044480
> ./arm/lc823450/lc823450-
> xgevk/configs/krndis/defconfig:CONFIG_RAM_SIZE=1044480
> ./arm/lc823450/lc823450-
> xgevk/configs/posix_spawn/defconfig:CONFIG_RAM_SIZE=1044480
> ./arm/lc823450/lc823450-
> xgevk/configs/rndis/defconfig:CONFIG_RAM_SIZE=1044480
> ./arm/lc823450/lc823450-
> xgevk/configs/usb/defconfig:CONFIG_RAM_SIZE=1044480
> ./arm/lpc17xx_40xx/lx_cpu/configs/nsh/defconfig:CONFIG_RAM_SIZE=65536
> ./arm/sama5/sama5d4-
> ek/configs/elf/defconfig:CONFIG_RAM_SIZE=268435456
> ./arm/sama5/sama5d4-
> ek/configs/knsh/defconfig:CONFIG_RAM_SIZE=268435456
> ./arm/stm32/olimex-stm32-
> p407/configs/kelf/defconfig:CONFIG_RAM_SIZE=114688
> ./arm/stm32/stm32f4discovery/configs/elf/defconfig:CONFIG_RAM_SIZE=11
> 4688
> ./arm/stm32/stm32f4discovery/configs/posix_spawn/defconfig:CONFIG_RAM
> _SIZE=114688
> ./arm/stm32/stm32f4discovery/configs/rndis/defconfig:CONFIG_RAM_SIZE=
> 114688
> ./arm/tms570/tms570ls31x-usb-
> kit/configs/nsh/defconfig:CONFIG_RAM_SIZE=262143
> ./risc-v/k210/maix-bit/configs/elf/defconfig:CONFIG_RAM_SIZE=2097152
> ./risc-v/k210/maix-
> bit/configs/module/defconfig:CONFIG_RAM_SIZE=2097152
> ./risc-v/k210/maix-
> bit/configs/posix_spawn/defconfig:CONFIG_RAM_SIZE=2097152
>
> And one of these exceptions has a large external DRAM:
>
> $ find . -name defconfig | xargs grep -l CONFIG_ELF=y | xargs grep
> EXTDRAM
> ./arm/lpc17xx_40xx/lx_cpu/configs/nsh/defconfig:CONFIG_LPC17_40_EXTDR
> AM=y
> ./arm/lpc17xx_40xx/lx_cpu/configs/nsh/defconfig:CONFIG_LPC17_40_EXTDR
> AMSIZE=33554432
>
>
