gso vs tso

[Varun Sharma]

If both are ON then which one works tso or gso ?

On Wed, Nov 19, 2014 at 12:22 PM, Varun Sharma <vsdssd at gmail.com> wrote:
> If both are ON then which one works tso or gso ?
>
>
>
> On Wed, Nov 19, 2014 at 12:07 PM, Raj Ravi <mekaviraj at gmail.com> wrote:
>> TSO is a hardware feature whereas GSO is a software feature.
>>
>> In the sense, TSO needs "the device" to break the frame into MTU sized segments.
>> BUT, GSO is a strategy followed by kernel to avoid processing smaller
>> packets  throughout the stack.
>>
>> Refer this:
>> http://blogs.gnome.org/markmc/2008/05/28/checksums-scatter-gather-io-and-segmentation-offload/
>>
>> <<<
>> GSO is a generalisation of this in the kernel. The idea is that you
>> delay segmenting a packet until the latest possible moment. In the
>> case where a device doesn’t support TSO, this would be just before
>> passing the skb to the driver. If the device does support TSO, the
>> unsegmented skb would be passed to the driver.
>> <<<
>>
>>
>> On Wed, Nov 19, 2014 at 11:40 AM, Varun Sharma <vsdssd at gmail.com> wrote:
>>> Hi,
>>>
>>> I have basic question about gso(generic segmentation offload) vs
>>> tso(TCP segmentation offload)
>>>
>>> 1. How both are different to each other?
>>>
>>> 2. If both are ON using ethtool which one is perform segmentation gso or tso ?
>>>
>>>
>>> Regards
>>> varun
>>>
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