[Intel-wired-lan] Linux 4.12+ memory leak on router with i40e NICs
Paweł Staszewski
pstaszewski at itcare.pl
Wed Oct 18 22:20:33 UTC 2017
W dniu 2017-10-18 o 17:44, Paweł Staszewski pisze:
>
>
> W dniu 2017-10-17 o 16:08, Paweł Staszewski pisze:
>>
>>
>> W dniu 2017-10-17 o 13:52, Paweł Staszewski pisze:
>>>
>>>
>>> W dniu 2017-10-17 o 13:05, Paweł Staszewski pisze:
>>>>
>>>>
>>>> W dniu 2017-10-17 o 12:59, Paweł Staszewski pisze:
>>>>>
>>>>>
>>>>> W dniu 2017-10-17 o 12:51, Paweł Staszewski pisze:
>>>>>>
>>>>>>
>>>>>> W dniu 2017-10-17 o 12:20, Paweł Staszewski pisze:
>>>>>>>
>>>>>>>
>>>>>>> W dniu 2017-10-17 o 11:48, Paweł Staszewski pisze:
>>>>>>>>
>>>>>>>>
>>>>>>>> W dniu 2017-10-17 o 02:44, Paweł Staszewski pisze:
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> W dniu 2017-10-17 o 01:56, Alexander Duyck pisze:
>>>>>>>>>> On Mon, Oct 16, 2017 at 4:34 PM, Paweł Staszewski
>>>>>>>>>> <pstaszewski at itcare.pl> wrote:
>>>>>>>>>>>
>>>>>>>>>>> W dniu 2017-10-16 o 18:26, Paweł Staszewski pisze:
>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>> W dniu 2017-10-16 o 13:20, Pavlos Parissis pisze:
>>>>>>>>>>>>> On 15/10/2017 02:58 πμ, Alexander Duyck wrote:
>>>>>>>>>>>>>> Hi Pawel,
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> To clarify is that Dave Miller's tree or Linus's that you
>>>>>>>>>>>>>> are talking
>>>>>>>>>>>>>> about? If it is Dave's tree how long ago was it you
>>>>>>>>>>>>>> pulled it since I
>>>>>>>>>>>>>> think the fix was just pushed by Jeff Kirsher a few days
>>>>>>>>>>>>>> ago.
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> The issue should be fixed in the following commit:
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> https://git.kernel.org/pub/scm/linux/kernel/git/davem/net.git/commit/drivers/net/ethernet/intel/i40e/i40e_txrx.c?id=2b9478ffc550f17c6cd8c69057234e91150f5972
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>
>>>>>>>>>>>>> Do you know when it is going to be available on net-next
>>>>>>>>>>>>> and linux-stable
>>>>>>>>>>>>> repos?
>>>>>>>>>>>>>
>>>>>>>>>>>>> Cheers,
>>>>>>>>>>>>> Pavlos
>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>> I will make some tests today night with "net" git tree
>>>>>>>>>>>> where this patch is
>>>>>>>>>>>> included.
>>>>>>>>>>>> Starting from 0:00 CET
>>>>>>>>>>>> :)
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>> Upgraded and looks like problem is not solved with that patch
>>>>>>>>>>> Currently running system with
>>>>>>>>>>> https://git.kernel.org/pub/scm/linux/kernel/git/davem/net.git/
>>>>>>>>>>> kernel
>>>>>>>>>>>
>>>>>>>>>>> Still about 0.5GB of memory is leaking somewhere
>>>>>>>>>>>
>>>>>>>>>>> Also can confirm that the latest kernel where memory is not
>>>>>>>>>>> leaking (with
>>>>>>>>>>> use i40e driver intel 710 cards) is 4.11.12
>>>>>>>>>>> With kernel 4.11.12 - after hour no change in memory usage.
>>>>>>>>>>>
>>>>>>>>>>> also checked that with ixgbe instead of i40e with same
>>>>>>>>>>> net.git kernel there
>>>>>>>>>>> is no memleak - after hour same memory usage - so for 100%
>>>>>>>>>>> this is i40e
>>>>>>>>>>> driver problem.
>>>>>>>>>> So how long was the run to get the .5GB of memory leaking?
>>>>>>>>> 1 hour
>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> Also is there any chance of you being able to bisect to
>>>>>>>>>> determine
>>>>>>>>>> where the memory leak was introduced since as you pointed out it
>>>>>>>>>> didn't exist in 4.11.12 so odds are it was introduced somewhere
>>>>>>>>>> between 4.11 and the latest kernel release.
>>>>>>>>> Can be hard cause currently need to back to 4.11.12 - this is
>>>>>>>>> production host/router
>>>>>>>>> Will try to find some free/test router for tests/bicects with
>>>>>>>>> i40e driver (intel 710 cards)
>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> Thanks.
>>>>>>>>>>
>>>>>>>>>> - Alex
>>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>> Also forgoto to add errors for i40e when driver initialize:
>>>>>>>> [ 15.760569] i40e 0000:02:00.1: Error I40E_AQ_RC_ENOSPC
>>>>>>>> adding RX filters on PF, promiscuous mode forced on
>>>>>>>> [ 16.365587] i40e 0000:03:00.3: Error I40E_AQ_RC_ENOSPC
>>>>>>>> adding RX filters on PF, promiscuous mode forced on
>>>>>>>> [ 16.367686] i40e 0000:02:00.2: Error I40E_AQ_RC_ENOSPC
>>>>>>>> adding RX filters on PF, promiscuous mode forced on
>>>>>>>> [ 16.368816] i40e 0000:03:00.0: Error I40E_AQ_RC_ENOSPC
>>>>>>>> adding RX filters on PF, promiscuous mode forced on
>>>>>>>> [ 16.369877] i40e 0000:03:00.2: Error I40E_AQ_RC_ENOSPC
>>>>>>>> adding RX filters on PF, promiscuous mode forced on
>>>>>>>> [ 16.370941] i40e 0000:02:00.3: Error I40E_AQ_RC_ENOSPC
>>>>>>>> adding RX filters on PF, promiscuous mode forced on
>>>>>>>> [ 16.372005] i40e 0000:02:00.0: Error I40E_AQ_RC_ENOSPC
>>>>>>>> adding RX filters on PF, promiscuous mode forced on
>>>>>>>> [ 16.373029] i40e 0000:03:00.1: Error I40E_AQ_RC_ENOSPC
>>>>>>>> adding RX filters on PF, promiscuous mode forced on
>>>>>>>>
>>>>>>>> some params that are set for this nic's
>>>>>>>> ip link set up dev $i
>>>>>>>> ethtool -A $i autoneg off rx off tx off
>>>>>>>> ethtool -G $i rx 1024 tx 2048
>>>>>>>> ip link set $i txqueuelen 1000
>>>>>>>> ethtool -C $i adaptive-rx off adaptive-tx off rx-usecs
>>>>>>>> 512 tx-usecs 128
>>>>>>>> ethtool -L $i combined 6
>>>>>>>> #ethtool -N $i rx-flow-hash udp4 sdfn
>>>>>>>> ethtool -K $i ntuple on
>>>>>>>> ethtool -K $i gro off
>>>>>>>> ethtool -K $i tso off
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>> Also after TSO/GRO on there is memory usage change - and leaking
>>>>>>> faster
>>>>>>> Below image from memory usage before change with TSO/GRO OFF and
>>>>>>> after enabling TSO/GRO
>>>>>>>
>>>>>>> https://ibb.co/dTqBY6
>>>>>>>
>>>>>>>
>>>>>>> Thanks
>>>>>>> Pawel
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>> With settings like this:
>>>>>> ifc='enp2s0f0 enp2s0f1 enp2s0f2 enp2s0f3 enp3s0f0 enp3s0f1
>>>>>> enp3s0f2 enp3s0f3'
>>>>>> for i in $ifc
>>>>>> do
>>>>>> ethtool -C $i adaptive-rx off adaptive-tx off rx-usecs
>>>>>> 512 tx-usecs 128
>>>>>> ethtool -K $i gro on
>>>>>> ethtool -K $i tso on
>>>>>>
>>>>>> done
>>>>>>
>>>>>> Server is leaking about 4-6MB per each 10 seconds
>>>>>> MEMLEAK:
>>>>>> 5 MB/10sec
>>>>>> 6 MB/10sec
>>>>>> 4 MB/10sec
>>>>>> 4 MB/10sec
>>>>>>
>>>>>>
>>>>>> Other settings TSO/GRO off
>>>>>> ifc='enp2s0f0 enp2s0f1 enp2s0f2 enp2s0f3 enp3s0f0 enp3s0f1
>>>>>> enp3s0f2 enp3s0f3'
>>>>>> for i in $ifc
>>>>>> do
>>>>>> ethtool -C $i adaptive-rx off adaptive-tx off rx-usecs
>>>>>> 512 tx-usecs 128
>>>>>> ethtool -K $i gro off
>>>>>> ethtool -K $i tso off
>>>>>>
>>>>>> done
>>>>>>
>>>>>> Same leak about 5MB per 10 seconds
>>>>>> MEMLEAK:
>>>>>> 5 MB/10sec
>>>>>> 5 MB/10sec
>>>>>> 5 MB/10sec
>>>>>>
>>>>>>
>>>>>> Other settings rx-usecs change from 512 to 1024:
>>>>>> ifc='enp2s0f0 enp2s0f1 enp2s0f2 enp2s0f3 enp3s0f0 enp3s0f1
>>>>>> enp3s0f2 enp3s0f3'
>>>>>> for i in $ifc
>>>>>> do
>>>>>> ethtool -C $i adaptive-rx off adaptive-tx off rx-usecs
>>>>>> 1024 tx-usecs 128
>>>>>> ethtool -K $i gro off
>>>>>> ethtool -K $i tso off
>>>>>>
>>>>>> done
>>>>>>
>>>>>> MEMLEAK:
>>>>>> 4 MB/10sec
>>>>>> 3 MB/10sec
>>>>>> 4 MB/10sec
>>>>>> 4 MB/10sec
>>>>>>
>>>>>>
>>>>>> So memleak have something to do with rx-usecs (less interrupts
>>>>>> but bigger latency for traffic)
>>>>>>
>>>>>>
>>>>>> But also enabling TSO/GRO making leak about 1MB bigger for each
>>>>>> 10 seconds
>>>>>>
>>>>>>
>>>>>>
>>>>> So far best config is:
>>>>> ifc='enp2s0f0 enp2s0f1 enp2s0f2 enp2s0f3 enp3s0f0 enp3s0f1
>>>>> enp3s0f2 enp3s0f3'
>>>>> for i in $ifc
>>>>> do
>>>>> ethtool -C $i adaptive-rx off adaptive-tx off rx-usecs 64
>>>>> tx-usecs 512
>>>>> ethtool -K $i gro off
>>>>> ethtool -K $i tso on
>>>>>
>>>>> done
>>>>>
>>>>> MEMLEAK - about 2MB/10secs
>>>>> 2 MB/10sec
>>>>> 2 MB/10sec
>>>>> 2 MB/10sec
>>>>>
>>>>>
>>>>> With - rx-usecs set to 256 (about 7-9MB/10secs memleak)
>>>>> ifc='enp2s0f0 enp2s0f1 enp2s0f2 enp2s0f3 enp3s0f0 enp3s0f1
>>>>> enp3s0f2 enp3s0f3'
>>>>> for i in $ifc
>>>>> do
>>>>> ethtool -C $i adaptive-rx off adaptive-tx off rx-usecs 256
>>>>> tx-usecs 512
>>>>> ethtool -K $i gro off
>>>>> ethtool -K $i tso on
>>>>>
>>>>> done
>>>>>
>>>>> MEMLEAK:
>>>>> 7 MB/10sec
>>>>> 7 MB/10sec
>>>>> 8 MB/10sec
>>>>> 9 MB/10sec
>>>>>
>>>>>
>>>>
>>>> And even less memleak with rx-usecs set to 32
>>>> ifc='enp2s0f0 enp2s0f1 enp2s0f2 enp2s0f3 enp3s0f0 enp3s0f1 enp3s0f2
>>>> enp3s0f3'
>>>> for i in $ifc
>>>> do
>>>> ethtool -C $i adaptive-rx off adaptive-tx off rx-usecs 32
>>>> tx-usecs 512
>>>> ethtool -K $i gro off
>>>> ethtool -K $i tso on
>>>>
>>>> done
>>>>
>>>>
>>>> MEMLEAK - about 0-2MB for each 10 seconds
>>>> 0 MB/10sec
>>>> 1 MB/10sec
>>>> 0 MB/10sec
>>>> 2 MB/10sec
>>>> 1 MB/10sec
>>>>
>>>>
>>>>
>>>
>>>
>>> So best settings - to have as less leak as possible for now
>>> (rx-usecs set to 16):
>>> ifc='enp2s0f0 enp2s0f1 enp2s0f2 enp2s0f3 enp3s0f0 enp3s0f1 enp3s0f2
>>> enp3s0f3'
>>> for i in $ifc
>>> do
>>> ethtool -C $i adaptive-rx off adaptive-tx off rx-usecs 16
>>> tx-usecs 768
>>> ethtool -K $i gro on
>>> ethtool -K $i tso on
>>>
>>> done
>>>
>>>
>>> MEMLEAK: (0-1MB/10seconds)
>>> 0 MB/10sec
>>> 0 MB/10sec
>>> 0 MB/10sec
>>> 1 MB/10sec
>>> 1 MB/10sec
>>> -1 MB/10sec
>>> 1 MB/10sec
>>> 1 MB/10sec
>>> 0 MB/10sec
>>>
>>> (there are some memory recycles - so this is good :) )
>>>
>>>
>>>
>>> Compared to(rx-usecs 512):
>>>
>>> ifc='enp2s0f0 enp2s0f1 enp2s0f2 enp2s0f3 enp3s0f0 enp3s0f1 enp3s0f2
>>> enp3s0f3'
>>> for i in $ifc
>>> do
>>> ethtool -C $i adaptive-rx off adaptive-tx off rx-usecs 512
>>> tx-usecs 128
>>> ethtool -K $i gro on
>>> ethtool -K $i tso on
>>>
>>> done
>>>
>>> Server is leaking about 4-6MB per each 10 seconds
>>> MEMLEAK:
>>> 5 MB/10sec
>>> 6 MB/10sec
>>> 4 MB/10sec
>>> 4 MB/10sec
>>>
>>>
>>
>> And graph where all changes for rx-usecs was done over some time:
>> https://ibb.co/nrRfbR
>>
>>
>>
>>
>>
> Cant eliminate the problem with settings - memleak is bigger or less
> visible with rx-usecs set to low values - but then have 100% cpu load
> - cant have rx-usecs set to 16
>
> Cant find also other host with same cards or that are using i40e
> driver for tests with bisecting
> So will just replace to mellanox :)
>
>
Also after fresh reboot with i40e
startup settings:
ifc='enp2s0f0 enp2s0f1 enp2s0f2 enp2s0f3 enp3s0f0 enp3s0f1 enp3s0f2
enp3s0f3'
for i in $ifc
do
ip link set up dev $i
ethtool -A $i autoneg off rx off tx off
ethtool -G $i rx 2048 tx 2048
ip link set $i txqueuelen 1000
#ethtool -C $i rx-usecs 256
ethtool -C $i adaptive-rx off adaptive-tx off rx-usecs 17
tx-usecs 125
ethtool -L $i combined 6
#ethtool -N $i rx-flow-hash udp4 sdfn
#ethtool -K $i ntuple on
#ethtool -K $i gro off
#ethtool -K $i tso off
done
After issuing:
ethtool -K enp2s0f0 gro on tso on
dmesg shows
[35764.338259] i40e 0000:02:00.0: PF reset failed, -15
and no traffic on the card :)
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