From: Rafal Milecki
> Sent: 07 April 2019 12:55
...
> If not, maybe w really need to think about some good & clever condition for
> disabling GRO by default on hw without checksum offloading.
Maybe GRO could assume the checksums are valid so the checksum
would only be verified when the packet is d
Now I have some questions regarding possible optimizations. Note I'm too
familiar with the net subsystem so maybe I got wrong ideas.
On 07.04.2019 13:53, Rafał Miłecki wrote:
On 04.04.2019 14:57, Rafał Miłecki wrote:
Long story short, starting with the commit 66e5133f19e9 ("vlan: Add GRO suppor
On 04.04.2019 14:57, Rafał Miłecki wrote:
Long story short, starting with the commit 66e5133f19e9 ("vlan: Add GRO support
for non hardware accelerated vlan") - which first hit kernel 4.2 - NAT
performance of my router dropped by 30% - 40%.
I'll try to provide some summary for this issue. I'll f
On 04/05/2019 03:51 AM, Florian Westphal wrote:
> Toke Høiland-Jørgensen wrote:
>> As a first approximation, maybe just:
>>
>> if (!has_hardware_cksum_offload(netdev) && link_rate(netdev) <= 1Gbps)
>> disable_gro();
>
> I don't think its a good idea. For local delivery case, there is no
> w
Toke Høiland-Jørgensen wrote:
> As a first approximation, maybe just:
>
> if (!has_hardware_cksum_offload(netdev) && link_rate(netdev) <= 1Gbps)
> disable_gro();
I don't think its a good idea. For local delivery case, there is no
way to avoid the checksum cost, so might as well have GRO enabl
Toshiaki Makita writes:
> On 2019/04/05 16:14, Felix Fietkau wrote:
>> On 2019-04-05 09:11, Rafał Miłecki wrote:
>>> On 05.04.2019 07:48, Rafał Miłecki wrote:
On 05.04.2019 06:26, Toshiaki Makita wrote:
> My test results:
>
> Receiving packets from eth0.10, forwarding them to eth
On 05.04.2019 10:12, Rafał Miłecki wrote:
On 05.04.2019 09:58, Toshiaki Makita wrote:
On 2019/04/05 16:14, Felix Fietkau wrote:
On 2019-04-05 09:11, Rafał Miłecki wrote:
I guess its GRO + csum_partial() to be blamed for this performance drop.
Maybe csum_partial() is very fast on your powerful
On 05.04.2019 09:58, Toshiaki Makita wrote:
On 2019/04/05 16:14, Felix Fietkau wrote:
On 2019-04-05 09:11, Rafał Miłecki wrote:
I guess its GRO + csum_partial() to be blamed for this performance drop.
Maybe csum_partial() is very fast on your powerful machine and few extra calls
don't make a d
On 2019/04/05 16:14, Felix Fietkau wrote:
> On 2019-04-05 09:11, Rafał Miłecki wrote:
>> On 05.04.2019 07:48, Rafał Miłecki wrote:
>>> On 05.04.2019 06:26, Toshiaki Makita wrote:
My test results:
Receiving packets from eth0.10, forwarding them to eth0.20 and applying
MASQUERADE
On 05.04.2019 07:48, Rafał Miłecki wrote:
On 05.04.2019 06:26, Toshiaki Makita wrote:
My test results:
Receiving packets from eth0.10, forwarding them to eth0.20 and applying
MASQUERADE on eth0.20, using i40e 25G NIC on kernel 4.20.13.
Disabled rxvlan by ethtool -K to exercise vlan_gro_receive(
On 2019-04-05 09:11, Rafał Miłecki wrote:
> On 05.04.2019 07:48, Rafał Miłecki wrote:
>> On 05.04.2019 06:26, Toshiaki Makita wrote:
>>> My test results:
>>>
>>> Receiving packets from eth0.10, forwarding them to eth0.20 and applying
>>> MASQUERADE on eth0.20, using i40e 25G NIC on kernel 4.20.13.
On 05.04.2019 06:26, Toshiaki Makita wrote:
On 2019/04/05 5:22, Rafał Miłecki wrote:
On 04.04.2019 17:17, Toshiaki Makita wrote:
On 19/04/04 (木) 21:57:15, Rafał Miłecki wrote:
I'd like to report a regression that goes back to the 2015. I know
it's damn
late, but the good thing is, the regressi
On 2019/04/05 5:22, Rafał Miłecki wrote:
> On 04.04.2019 17:17, Toshiaki Makita wrote:
>> On 19/04/04 (木) 21:57:15, Rafał Miłecki wrote:
>>> I'd like to report a regression that goes back to the 2015. I know
>>> it's damn
>>> late, but the good thing is, the regression is still easy to
>>> reproduc
On 04.04.2019 17:17, Toshiaki Makita wrote:
On 19/04/04 (木) 21:57:15, Rafał Miłecki wrote:
I'd like to report a regression that goes back to the 2015. I know it's damn
late, but the good thing is, the regression is still easy to reproduce, verify &
revert.
Long story short, starting with the co
Hi Rafał,
On 19/04/04 (木) 21:57:15, Rafał Miłecki wrote:
Hello,
I'd like to report a regression that goes back to the 2015. I know it's
damn
late, but the good thing is, the regression is still easy to reproduce,
verify &
revert.
Long story short, starting with the commit 66e5133f19e9 ("vla
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