RE: [PATCH v2 net-next 1/2] net: mana: Allow tso_max_size to go up-to GSO_MAX_SIZE

[Haiyang Zhang]

> -----Original Message-----
> From: Shradha Gupta <shradhagupta@xxxxxxxxxxxxxxxxxxx>
> Sent: Sunday, February 9, 2025 11:40 PM
> To: linux-hyperv@xxxxxxxxxxxxxxx; netdev@xxxxxxxxxxxxxxx; linux-
> kernel@xxxxxxxxxxxxxxx
> Cc: Shradha Gupta <shradhagupta@xxxxxxxxxxxxxxxxxxx>; KY Srinivasan
> <kys@xxxxxxxxxxxxx>; Haiyang Zhang <haiyangz@xxxxxxxxxxxxx>; Wei Liu
> <wei.liu@xxxxxxxxxx>; Dexuan Cui <decui@xxxxxxxxxxxxx>; Andrew Lunn
> <andrew+netdev@xxxxxxx>; David S. Miller <davem@xxxxxxxxxxxxx>; Eric
> Dumazet <edumazet@xxxxxxxxxx>; Jakub Kicinski <kuba@xxxxxxxxxx>; Paolo
> Abeni <pabeni@xxxxxxxxxx>; Long Li <longli@xxxxxxxxxxxxx>; Konstantin
> Taranov <kotaranov@xxxxxxxxxxxxx>; Souradeep Chakrabarti
> <schakrabarti@xxxxxxxxxxxxxxxxxxx>; Erick Archer
> <erick.archer@xxxxxxxxxxx>; Shradha Gupta <shradhagupta@xxxxxxxxxxxxx>
> Subject: [PATCH v2 net-next 1/2] net: mana: Allow tso_max_size to go up-
> to GSO_MAX_SIZE
> 
> Allow the max aggregated pkt size to go up-to GSO_MAX_SIZE for MANA NIC.
> This patch only increases the max allowable gso/gro pkt size for MANA
> devices and does not change the defaults.
> Following are the perf benefits by increasing the pkt aggregate size from
> legacy gso_max_size value(64K) to newer one(up-to 511K)
> 
> for i in {1..10}; do netperf -t TCP_RR  -H 10.0.0.5 -p50000 -- -
> r80000,80000
> -O MIN_LATENCY,P90_LATENCY,P99_LATENCY,THROUGHPUT|tail -1; done
> 
> min	p90	p99	Throughput		gso_max_size
> 93	171	194	6594.25
> 97	154	180	7183.74
> 95	165	189	6927.86
> 96	165	188	6976.04
> 93	154	185	7338.05			64K
> 93	168	189	6938.03
> 94	169	189	6784.93
> 92	166	189	7117.56
> 94	179	191	6678.44
> 95	157	183	7277.81
> 
> min	p90	p99	Throughput
> 93	134	146	8448.75
> 95	134	140	8396.54
> 94	137	148	8204.12
> 94	137	148	8244.41
> 94	128	139	8666.52			80K
> 94	141	153	8116.86
> 94	138	149	8163.92
> 92	135	142	8362.72
> 92	134	142	8497.57
> 93	136	148	8393.23
> 
> Tested on azure env with Accelerated Networking enabled and disabled.
> 
> Signed-off-by: Shradha Gupta <shradhagupta@xxxxxxxxxxxxxxxxxxx>

Reviewed-by: Haiyang Zhang <haiyangz@xxxxxxxxxxxxx>