[Crash-utility] FW: Number of cpus on ARM

[Arun KS]

Hello Jan,

Can you try with option --cpus=4 passed when your start the crash.
I used 4 here because i have 4 cores.

Thanks,
Arun

On Wed, Oct 15, 2014 at 2:49 PM, Karlsson, Jan <Jan.Karlsson at sonymobile.com>
wrote:

> Hi
>
>
>
> Unfortunately I found another older example where my patch below did not
> work.
>
> In that one only cpu 0 where online but 0,1,2,3 where active. So maybe:
>
>
>
>                            return MAX(get_cpus_active(),
> get_highest_cpu_online()+1);
>
>
>
> might work better. Someone with better knowledge about this than I have
> should look at the problem.
>
>
>
> Jan
>
>
>
> *Jan Karlsson*
>
> Senior Software Engineer
>
> System Assurance
>
>
>
> *Sony Mobile Communications*
>
> Tel: +46 703 062 174
>
> jan.karlsson at sonymobile.com <Firstname.Lastname at sonymobile.com>
>
>
>
> sonymobile.com
>
>
>
> [image: Sony logotype_23px height_Email_144dpi]
>
>
>
> *From:* Karlsson, Jan
> *Sent:* den 15 oktober 2014 10:49
> *To:* Discussion list for crash utility usage, maintenance and development
> *Subject:*
>
>
>
> Hi
>
>
>
> I have seen a problem when it comes to the number of cpus for ARM
> (32-bits).
>
>
>
> static int
>
> arm_get_smp_cpus(void)
>
> {
>
>                            return MAX(get_cpus_active(),
> get_cpus_online());
>
> }
>
>
>
> In one of my example, "help -k" gives me:
>
>        cpu_possible_map: 0 1 2 3
>
>         cpu_present_map: 0 1 2 3
>
>          cpu_online_map: 0 3
>
>          cpu_active_map: 3
>
>
>
> So the number of cpus will become 2. However there are code in a number of
> places that will then only accept cpu 0 and 1 as cpus to handle.
>
>
>
> When I changed to code to be the same as for ARM64 things worked as
> expected:
>
>
>
> static int
>
> arm_get_smp_cpus(void)
>
> {
>
>                            return MAX(get_cpus_online(),
> get_highest_cpu_online()+1);
>
> }
>
>
>
> Jan
>
>
>
> *Jan Karlsson*
>
> Senior Software Engineer
>
> System Assurance
>
>
>
> *Sony Mobile Communications*
>
> Tel: +46 703 062 174
>
> jan.karlsson at sonymobile.com <Firstname.Lastname at sonymobile.com>
>
>
>
> sonymobile.com
>
>
>
> [image: Sony logotype_23px height_Email_144dpi]
>
>
>
> --
> Crash-utility mailing list
> Crash-utility at redhat.com
> https://www.redhat.com/mailman/listinfo/crash-utility
>
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