On 12/17/2014 4:28 AM, Alex Netes wrote:
> Torus-2QoS fails to configure fabric with more than 16 HCAs.
> This patch extends PORTGRP_MAX_PORTS to be 34. Maximal practical ports
> per switch - 2 reserved ports (minimal of needed ports for switch to
> switch connections in 2D Torus).
>
> Signed-off-by: Alex Netes <[email protected]>
> ---
> opensm/osm_torus.c | 2 +-
> 1 files changed, 1 insertions(+), 1 deletions(-)
>
> diff --git a/opensm/osm_torus.c b/opensm/osm_torus.c
> index 330f55d..b01f69f 100644
> --- a/opensm/osm_torus.c
> +++ b/opensm/osm_torus.c
> @@ -59,7 +59,7 @@
> #include <opensm/osm_opensm.h>
>
> #define TORUS_MAX_DIM 3
> -#define PORTGRP_MAX_PORTS 16
> +#define PORTGRP_MAX_PORTS 34
> #define SWITCH_MAX_PORTGRPS (1 + 2 * TORUS_MAX_DIM)
> #define DEFAULT_MAX_CHANGES 32
>
There is portgroup_max_ports configuration parameter for torus to change this
if needed.
man torus-2QoS.conf states:
portgroup_max_ports max_ports
This keyword specifies the maximum number of parallel inter-
switch links, and also the maximum number of host ports per
switch, that torus-2QoS can accommodate. The default value is
16. Torus-2QoS will log an error message during topology dis-
covery if this parameter needs to be increased. If this keyword
appears multiple times, the last instance prevails.
Note that the switch management port (switch port 0) gets put
into the same port group with the host ports, so if you have 16
host ports per switch, portgroup_max_ports would need to be at
least 17.
Is there really a need to change the default for this ?
-- Hal
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