Re: [pve-devel] [PATCH qemu-server] net: increase max queues to 128

[Thomas Lamprecht <t.lamprecht@proxmox.com>]

Am 16/11/2022 um 05:13 schrieb Alexandre Derumier:
> max supported queues tx + rx = 256, so 128 for combined
> https://lists.gnu.org/archive/html/qemu-devel/2015-03/msg03917.html

do you really use such a relatively high amount of queues in practice?

The patch even mentions that on x86 one can only have 80 queue rx+tx
pairs, so maybe lets go for 64 as increased limit and wait on some
more user feedback for a even higher limit; at least if you don't need
that already in your production setups?


> 
> Signed-off-by: Alexandre Derumier <aderumier@odiso.com>
> ---
>  PVE/QemuServer.pm | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/PVE/QemuServer.pm b/PVE/QemuServer.pm
> index 3b64089..da007f4 100644
> --- a/PVE/QemuServer.pm
> +++ b/PVE/QemuServer.pm
> @@ -921,7 +921,7 @@ my $net_fmt = {
>      }),
>      queues => {
>  	type => 'integer',
> -	minimum => 0, maximum => 16,
> +	minimum => 0, maximum => 128,
>  	description => 'Number of packet queues to be used on the device.',
>  	optional => 1,
>      },