take the DRAM performance of the processes into consideration when scheduling
The CFS scheduler in Linux schedules the processes based on the virtual runtime of CPU. But, the DRAM memory is the bottleneck in most of the emerging domains. Why not take the DRAM performance of the processes into consideration when choosing the next process? Could anyone please give an explanation? Thank you... ___ linaro-dev mailing list linaro-dev@lists.linaro.org http://lists.linaro.org/mailman/listinfo/linaro-dev
issue compiling topic-leg-uefi kernel with UEFI-stub
I'm getting arch/arm/kernel/efi_phys.S: Assembler messages: arch/arm/kernel/efi_phys.S:42: Error: selected processor does not support ARM mode `isb' arch/arm/kernel/efi_phys.S:50: Error: selected processor does not support ARM mode `isb' make[1]: *** [arch/arm/kernel/efi_phys.o] Error 1 when compiling the topic-leg-uefi kernel [1] with EFI_STUB support for omap2plus_defconfig (to run on a BeagleBone Black with AM335x SoC). I've checked that armv7 supports `isb`, and I've tried the kernel.org 4.6.3-nolibc toolchain [2] and the Linaro gcc-arm-none-eabi-4.8 release. The build goes fine without EFI support. I need some help figuring out what's wrong. [1] https://git.linaro.org/people/leif.lindholm/linux.git/shortlog/refs/heads/topic-leg-uefi [2] https://www.kernel.org/pub/tools/crosstool/files/bin/x86_64/4.6.3/ Thanks, Varad ___ linaro-dev mailing list linaro-dev@lists.linaro.org http://lists.linaro.org/mailman/listinfo/linaro-dev
Re: issue compiling topic-leg-uefi kernel with UEFI-stub
On Thursday 11 December 2014 19:27:03 Varad Gautam wrote: > I'm getting > > arch/arm/kernel/efi_phys.S: Assembler messages: > arch/arm/kernel/efi_phys.S:42: Error: selected processor does not > support ARM mode `isb' > arch/arm/kernel/efi_phys.S:50: Error: selected processor does not > support ARM mode `isb' > make[1]: *** [arch/arm/kernel/efi_phys.o] Error 1 > > when compiling the topic-leg-uefi kernel [1] with EFI_STUB support for > omap2plus_defconfig (to run on a BeagleBone Black with AM335x SoC). I've > checked that armv7 supports `isb`, and I've tried the kernel.org > 4.6.3-nolibc toolchain [2] and the Linaro gcc-arm-none-eabi-4.8 release. > The build goes fine without EFI support. I need some help figuring out > what's wrong. > The code should be changed to use the instr_sync macro instead of using the isb instruction directly. Arnd ___ linaro-dev mailing list linaro-dev@lists.linaro.org http://lists.linaro.org/mailman/listinfo/linaro-dev
Re: issue compiling topic-leg-uefi kernel with UEFI-stub
On Thursday 11 December 2014 09:15 PM, Arnd Bergmann wrote: > On Thursday 11 December 2014 19:27:03 Varad Gautam wrote: >> I'm getting >> >> arch/arm/kernel/efi_phys.S: Assembler messages: >> arch/arm/kernel/efi_phys.S:42: Error: selected processor does not >> support ARM mode `isb' >> arch/arm/kernel/efi_phys.S:50: Error: selected processor does not >> support ARM mode `isb' >> make[1]: *** [arch/arm/kernel/efi_phys.o] Error 1 >> >> when compiling the topic-leg-uefi kernel [1] with EFI_STUB support for >> omap2plus_defconfig (to run on a BeagleBone Black with AM335x SoC). I've >> checked that armv7 supports `isb`, and I've tried the kernel.org >> 4.6.3-nolibc toolchain [2] and the Linaro gcc-arm-none-eabi-4.8 release. >> The build goes fine without EFI support. I need some help figuring out >> what's wrong. >> > The code should be changed to use the instr_sync macro instead of > using the isb instruction directly. > > Arnd Thanks, that did it. Should I send in a fix? ___ linaro-dev mailing list linaro-dev@lists.linaro.org http://lists.linaro.org/mailman/listinfo/linaro-dev
Re: issue compiling topic-leg-uefi kernel with UEFI-stub
On 11 December 2014 at 17:42, Varad Gautam wrote: > On Thursday 11 December 2014 09:15 PM, Arnd Bergmann wrote: >> On Thursday 11 December 2014 19:27:03 Varad Gautam wrote: >>> I'm getting >>> >>> arch/arm/kernel/efi_phys.S: Assembler messages: >>> arch/arm/kernel/efi_phys.S:42: Error: selected processor does not >>> support ARM mode `isb' >>> arch/arm/kernel/efi_phys.S:50: Error: selected processor does not >>> support ARM mode `isb' >>> make[1]: *** [arch/arm/kernel/efi_phys.o] Error 1 >>> >>> when compiling the topic-leg-uefi kernel [1] with EFI_STUB support for >>> omap2plus_defconfig (to run on a BeagleBone Black with AM335x SoC). I've >>> checked that armv7 supports `isb`, and I've tried the kernel.org >>> 4.6.3-nolibc toolchain [2] and the Linaro gcc-arm-none-eabi-4.8 release. >>> The build goes fine without EFI support. I need some help figuring out >>> what's wrong. >>> >> The code should be changed to use the instr_sync macro instead of >> using the isb instruction directly. > > Thanks, that did it. Should I send in a fix? Since you are building for a v7 platform, I guess this is caused by the TI platforms building for ARMv6 . If you send a patch to the linaro-uefi list, I'll apply it to my topic branch and it will get pulled into the next leg-kernel release. Changing the kernel config to disable v6 support would be a workaround. (Given Ard Biesheuvel's upcoming core changes, this particular file may actually disappear in future.) / Leif ___ linaro-dev mailing list linaro-dev@lists.linaro.org http://lists.linaro.org/mailman/listinfo/linaro-dev
