linux-kernel - Re: [PATCHv3 10/13] scripts/gdb: Add cpu iterators

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Date:	Sun, 13 Mar 2016 17:33:35 +0100
From:	Jan Kiszka <jan.kiszka@...mens.com>
To:	Kieran Bingham <kieran.bingham@...aro.org>,
	linux-kernel@...r.kernel.org
Cc:	lee.jones@...aro.org, peter.griffin@...aro.org,
	maxime.coquelin@...com
Subject: Re: [PATCHv3 10/13] scripts/gdb: Add cpu iterators

On 2016-03-03 12:41, Kieran Bingham wrote:
> The linux kernel provides macro's for iterating against values from the
> cpu_list masks. By providing some commonly used masks, we can mirror the
> kernels helper macros with easy to use generators.
> 
> Signed-off-by: Kieran Bingham <kieran.bingham@...aro.org>
> ---
>  scripts/gdb/linux/cpus.py | 21 +++++++++++++++++++++
>  1 file changed, 21 insertions(+)
> 
> diff --git a/scripts/gdb/linux/cpus.py b/scripts/gdb/linux/cpus.py
> index 4297b83fedef..59e24472c507 100644
> --- a/scripts/gdb/linux/cpus.py
> +++ b/scripts/gdb/linux/cpus.py
> @@ -100,6 +100,27 @@ def cpu_list(mask_name):
>          yield cpu
>  
>  
> +def each_online_cpu():
> +    for cpu in cpu_list("cpu_online_mask"):
> +        yield cpu
> +
> +
> +def each_present_cpu():
> +    for cpu in cpu_list("cpu_present_mask"):
> +        yield cpu
> +
> +
> +def each_possible_cpu():
> +    for cpu in cpu_list("cpu_possible_mask"):
> +        yield cpu
> +

This patch requires rebasing over master (these masks became macros).

In general, please base on master or even next before posting.

> +
> +def print_cpus():
> +    gdb.write("Possible CPUS : {}\n".format(list(each_possible_cpu())))
> +    gdb.write("Present CPUS  : {}\n".format(list(each_present_cpu())))
> +    gdb.write("Online CPUS   : {}\n".format(list(each_online_cpu())))

I think this can be useful. Let's make it a real, discoverable command.
lx-cpus?

> +
> +
>  class PerCpu(gdb.Function):
>      """Return per-cpu variable.
>  
> 

Jan

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