I will need one more information -
As per code, slot len is calculated as below.
the_slot_len = pfr->slot_header_len + pfr->bucket_len;
= ALIGN(the_slot_len + sizeof(u_int16_t) /* RING_MAGIC_VALUE */,
sizeof(u_int64_t));
But below error logs slot length is logged as 65576, shouldn't this have
been quite smaller if MTU is set as 1500.
[PF_RING] ERROR: min_num_slots (409600, slot len = 65576) causes memory
size to wrap
Regards,
Gautam
On Tue, Jan 9, 2018 at 2:32 PM, Chandrika Gautam <
chandrika.iitd.rock@gmail.com> wrote:
> Thanks Alfredo!
>
> Regards,
> Chandrika
>
> On Tue, Jan 9, 2018 at 2:13 PM, Alfredo Cardigliano <cardigliano@ntop.org>
> wrote:
>
>> Correct
>>
>> Alfredo
>>
>>
>> On 9 Jan 2018, at 08:38, Chandrika Gautam <chandrika.iitd.rock@gmail.com>
>> wrote:
>>
>> As per the code, it seems that all these memory allocation happens at the
>> time of ring creation only.
>> And a ring will be created whenever any new application(using pf_ring) is
>> spwaned.
>> And there should not be multiple occurrences of these errors if any
>> application is already up and running.
>> Please let me know if my understanding is correct.
>>
>> Regards,
>> Gautam
>>
>> On Tue, Jan 9, 2018 at 12:43 PM, Chandrika Gautam <
>> chandrika.iitd.rock@gmail.com> wrote:
>>
>>> Hi Alfredo,
>>>
>>> Does this error mean that packets are getting lost ? Problem is that I
>>> have not faced this issue in our lab. Its hit in one of the production
>>> server.
>>> Can you also explain what have you fixed to resolve this?
>>>
>>> Regards,
>>> Gautam
>>>
>>> On Sun, Jan 7, 2018 at 5:10 PM, Alfredo Cardigliano <
>>> cardigliano@ntop.org> wrote:
>>>
>>>> Hi Gautam
>>>> this is not related to hugepages (actually hugepages reserve physical
>>>> memory, thus
>>>> they can affect allocation, however in this specific case it was due to
>>>> a limit in the
>>>> pf_ring buffer size).
>>>> Please note I just pushed a patch to handle this case resizing the
>>>> buffer size when
>>>> limit is exceeded, please check if it’s working for you and let me know.
>>>>
>>>> Regards
>>>> Alfredo
>>>>
>>>>
>>>> On 5 Jan 2018, at 06:38, Chandrika Gautam <
>>>> chandrika.iitd.rock@gmail.com> wrote:
>>>>
>>>> Hi Alfredo,
>>>>
>>>> Can this issue be faced if hugepages are not created on server? Because
>>>> these errors disappeared after creating the hugepages.
>>>>
>>>> Regards,
>>>> Gautam
>>>>
>>>> On Fri, Jan 5, 2018 at 10:52 AM, Chandrika Gautam <
>>>> chandrika.iitd.rock@gmail.com> wrote:
>>>>
>>>>> Hi Alfredo,
>>>>>
>>>>> MTU is 1518 for all 6 interfaces except for lo (loopback)
>>>>> interface(65535).
>>>>>
>>>>> Regards,
>>>>> Gautam
>>>>>
>>>>>
>>>>> On Tue, Jan 2, 2018 at 6:46 PM, Alfredo Cardigliano <
>>>>> cardigliano@ntop.org> wrote:
>>>>>
>>>>>> What is the MTU size? It seems you are trying to allocate more than
>>>>>> 25GB of memory,
>>>>>> thus you get this failure. Please try reducing the number of slots,
>>>>>> if you cannot reduce
>>>>>> the buffers size.
>>>>>>
>>>>>> Regards
>>>>>> Alfredo
>>>>>>
>>>>>> On 2 Jan 2018, at 10:40, Chandrika Gautam <
>>>>>> chandrika.iitd.rock@gmail.com> wrote:
>>>>>>
>>>>>> [PF_RING] ERROR: min_num_slots (409600, slot len = 65576) causes
>>>>>> memory size to wrap
>>>>>> [PF_RING] ring_mmap(): unable to allocate memory
>>>>>>
>>>>>> Regards,
>>>>>> Gautam
>>>>>>
>>>>>> On Tue, Jan 2, 2018 at 2:46 PM, Alfredo Cardigliano <
>>>>>> cardigliano@ntop.org> wrote:
>>>>>>
>>>>>>> Hi Gautam
>>>>>>> please provide the error, I see just the insmod command..
>>>>>>>
>>>>>>> Regards
>>>>>>> Alfredo
>>>>>>>
>>>>>>> > On 27 Dec 2017, at 06:26, Chandrika Gautam <
>>>>>>> chandrika.iitd.rock@gmail.com> wrote:
>>>>>>> >
>>>>>>> > Hi,
>>>>>>> >
>>>>>>> > We are receiving below error while loading the pf_ring using below
>>>>>>> command even though there is free memory available on server. Please let me
>>>>>>> know if you need any other information.
>>>>>>> >
>>>>>>> > insmod pf_ring.ko min_num_slots=409600 enable_tx_capture=0
>>>>>>> enable_frag_coherence=0
>>>>>>> >
>>>>>>> > [root@CHOIPPROBE04B logs]# cat /proc/meminfo
>>>>>>> > MemTotal: 32743804 kB
>>>>>>> > MemFree: 24744428 kB
>>>>>>> > Buffers: 43208 kB
>>>>>>> > Cached: 445016 kB
>>>>>>> > SwapCached: 0 kB
>>>>>>> > Active: 6281204 kB
>>>>>>> > Inactive: 384396 kB
>>>>>>> > Active(anon): 6177672 kB
>>>>>>> > Inactive(anon): 8 kB
>>>>>>> > Active(file): 103532 kB
>>>>>>> > Inactive(file): 384388 kB
>>>>>>> > Unevictable: 0 kB
>>>>>>> > Mlocked: 0 kB
>>>>>>> > SwapTotal: 50331644 kB
>>>>>>> > SwapFree: 50331644 kB
>>>>>>> > Dirty: 2080 kB
>>>>>>> > Writeback: 0 kB
>>>>>>> > AnonPages: 6200104 kB
>>>>>>> > Mapped: 847312 kB
>>>>>>> > Shmem: 220 kB
>>>>>>> > Slab: 103712 kB
>>>>>>> > SReclaimable: 36832 kB
>>>>>>> > SUnreclaim: 66880 kB
>>>>>>> > KernelStack: 14208 kB
>>>>>>> > PageTables: 19664 kB
>>>>>>> > NFS_Unstable: 0 kB
>>>>>>> > Bounce: 0 kB
>>>>>>> > WritebackTmp: 0 kB
>>>>>>> > CommitLimit: 66703544 kB
>>>>>>> > Committed_AS: 9755140 kB
>>>>>>> > VmallocTotal: 34359738367 kB
>>>>>>> > VmallocUsed: 1437596 kB
>>>>>>> > VmallocChunk: 34340005064 kB
>>>>>>> > HardwareCorrupted: 0 kB
>>>>>>> > AnonHugePages: 6119424 kB
>>>>>>> > HugePages_Total: 0
>>>>>>> > HugePages_Free: 0
>>>>>>> > HugePages_Rsvd: 0
>>>>>>> > HugePages_Surp: 0
>>>>>>> > Hugepagesize: 2048 kB
>>>>>>> > DirectMap4k: 14336 kB
>>>>>>> > DirectMap2M: 2009088 kB
>>>>>>> > DirectMap1G: 31457280 kB
>>>>>>> >
>>>>>>> > Regards,
>>>>>>> > Gautam
>>>>>>> > _______________________________________________
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