Re: [OE-core] [PATCH 1/1] bitbake.conf: Set ZSTD_THREADS to half of cpu number

[Jose Quaresma <quaresma.jose@gmail.com>]

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Robert Yang <liezhi.yang@windriver.com> escreveu no dia terça, 9/11/2021
à(s) 08:12:

> The original value is very easy to cause do_packge error when cpu number is
> larger, for example, 128 cores and 512G mem:
>
> error: create archive failed: cpio: write failed - Cannot allocate memory"
>
> Set the ZSTD_THREADS to half of the CPU number can avoid the error in my
> testing.
>
> Signed-off-by: Robert Yang <liezhi.yang@windriver.com>
> ---
>  meta/conf/bitbake.conf | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/meta/conf/bitbake.conf b/meta/conf/bitbake.conf
> index 71c1e52ad6..46ebf5113f 100644
> --- a/meta/conf/bitbake.conf
> +++ b/meta/conf/bitbake.conf
> @@ -833,7 +833,7 @@ XZ_DEFAULTS ?= "--memlimit=${XZ_MEMLIMIT}
> --threads=${XZ_THREADS}"
>  XZ_DEFAULTS[vardepsexclude] += "XZ_MEMLIMIT XZ_THREADS"
>
>  # Default parallelism for zstd
> -ZSTD_THREADS ?= "${@oe.utils.cpu_count(at_least=2)}"
> +ZSTD_THREADS ?= "${@int(oe.utils.cpu_count(at_least=4)/2)}"
>

This will slow down all the systems with lower cpu cores.


>  ZSTD_THREADS[vardepvalue] = "1"
>
>  # Limit the number of threads that OpenMP libraries will use. Otherwise
> they
> --
> 2.17.1
>
>
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-- 
Best regards,

José Quaresma

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