Hi,
I want to test zero copy of pf-ring for receiving packets on multicast
IP's. I am using '*Intel Corporation 82579LM Gigabit Network
Connection*' NIC which is listed in pf-ring-aware NIC's. So these are
the steps I have followed:
1. mounted hugepages as follows:-
1.1. echo 1024 >
/sys/kernel/mm/hugepages/hugepages-2048kB/nr_hugepages.
1.2. mkdir /mnt/huge
1.3. mount -t hugetlbfs nodev /mnt/huge
2. Installed pfring-dkms-6.0.3-dkms.noarch.rpm which placed pf_ring.ko file.
3. Installed e1000e-zc-3.2.7.1.368-1dkms.noarch.rpm which placed a file
called e1000e_zc.ko parallel to pf_ring.ko.
4. used the following command in sequence:-
4.1. insmod pf_ring.ko transparent_mode=2
4.2. rmmod e1000e
4.3. insmod e1000e_zc.ko
5. Executed zcount with the following command "./zcount -i em1 -c 1".
Now, as far as I can understand, If we use ZC then any other non-pfring
application in unable to read the packets from the NIC. But I am able to
capture packets using wireshark on the same interface on which zcount
application is running. I am afraid that the packet capturing is opened
in pfring mode rather than zero copy mode.
My system configuration is as follows:
OS: Centos 6.5
RAM: 8 GB
NICS: 1. Intel Corporation 82579LM Gigabit Network Connection (em1)
2. Intel Corporation 82540EM Gigabit Ethernet Controller
(eth0)
Am I doing something wrong? Can you guide me through zero copy module,
apart from the above steps? Any help will be appreciated.
Thank you
Regards,
K Rahul
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