Re: [Xen-devel] [PATCH v10 3/9] vnuma hook to debug-keys u

[Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>]

On Wed, Sep 03, 2014 at 12:24:12AM -0400, Elena Ufimtseva wrote:
> Add debug-keys hook to display vnuma topology.
> 
> Signed-off-by: Elena Ufimtseva <ufimtseva@xxxxxxxxx>

Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>

> ---
>  xen/arch/x86/numa.c |   32 +++++++++++++++++++++++++++++++-
>  1 file changed, 31 insertions(+), 1 deletion(-)
> 
> diff --git a/xen/arch/x86/numa.c b/xen/arch/x86/numa.c
> index 555276e..346725f 100644
> --- a/xen/arch/x86/numa.c
> +++ b/xen/arch/x86/numa.c
> @@ -347,10 +347,11 @@ EXPORT_SYMBOL(node_data);
>  static void dump_numa(unsigned char key)
>  {
>      s_time_t now = NOW();
> -    int i;
> +    int i, j, err, n;
>      struct domain *d;
>      struct page_info *page;
>      unsigned int page_num_node[MAX_NUMNODES];
> +    uint64_t mem;
>  
>      printk("'%c' pressed -> dumping numa info (now-0x%X:%08X)\n", key,
>            (u32)(now>>32), (u32)now);
> @@ -389,6 +390,35 @@ static void dump_numa(unsigned char key)
>  
>          for_each_online_node(i)
>              printk("    Node %u: %u\n", i, page_num_node[i]);
> +
> +        if (!d->vnuma)
> +            continue;
> +
> +        printk("   %u vnodes, %u vcpus\n", d->vnuma->nr_vnodes, 
> d->max_vcpus);
> +        for (i = 0; i < d->vnuma->nr_vnodes; i++) {
> +            err = snprintf(keyhandler_scratch, 12, "%u",
> +                    d->vnuma->vnode_to_pnode[i]);
> +            if (err < 0 || d->vnuma->vnode_to_pnode[i] == NUMA_NO_NODE)
> +                snprintf(keyhandler_scratch, 3, "???");
> +
> +            printk("        vnode %3u - pnode %s,", i, keyhandler_scratch);
> +            mem = d->vnuma->vmemrange[i].end - d->vnuma->vmemrange[i].start;
> +            printk(" %"PRIu64" MB, ", mem >> 20);
> +
> +            printk("vcpu nrs: ");
> +            for (j = 0, n = 0; j < d->max_vcpus; j++) {
> +                if (d->vnuma->vcpu_to_vnode[j] == i) {
> +                    if ( ((n + 1) % 8) == 0 )
> +                        printk("%d\n", j);
> +                    else if ( !(n % 8) && n != 0 )
> +                        printk("%s%d ", "             ", j);
> +                    else
> +                        printk("%d ", j);
> +                    n++;
> +                }
> +            }
> +            printk("\n");
> +        }
>      }
>  
>      rcu_read_unlock(&domlist_read_lock);
> -- 
> 1.7.10.4
> 

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