I did a bunch test with DPDK v16.07 - system (netgate appliance box) CentOS release 6.5 (Final) Linux NETGATE-TEST-Appliance 2.6.32-431.5.1.el6.x86_64 #1 SMP Wed Feb 12 09:03:27 CET 2014 x86_64 x86_64 x86_64 GNU/Linux 4 CPU cores @2.4GHz 8 GB memory 6 1Gb NICs, eth0 - eth5
- install module (x86_64) igb_uio.ko rte_kni.ko - reserve huge pages memory (2M*512=1GB) mkdir -p /mnt/huge mount -t hugetlbfs nodev /mnt/huge echo 512 > /sys/devices/system/node/node0/hugepages/hugepages-2048kB/nr_hugepages - run test programs testpmd.i686 -c7 -n3 --vdev=eth_pcap0,iface=eth4 --vdev=eth_pcap1,iface=eth5 -- -i --nb-cores=2 --nb-ports=2 --total-num-mbufs=2048 packet size 64B Rx-pps and Tx-pps around 120K, or 77Mbps testpmd.i686 -c7 -n3 -- -i --nb-cores=2 --nb-ports=2 --total-num-mbufs=2048 use igb_uio driver packet size 64B Rx-pps and Tx-pps around 1.4M, or 900Mbps ./pktgen.i686 -c f -n 4 -- -p 0x3 -P -m "1.0, 2.1" -N -T packet size from 64 to 1500, all throughputs could reach 998-999Mbit/s According to the test results, could I say DPDK 32bit applications are GOOD to run on Linux 64bit kernel v2.6.32? Regards, James Huang On Thu, Nov 17, 2016 at 10:32 AM, Wiles, Keith <keith.wiles at intel.com> wrote: > >> On Nov 17, 2016, at 12:27 PM, James Huang <jamsphon at gmail.com> wrote: >> >> Hi, >> >> Nice to join DPDK community. >> >> read from DPDK system requirements for Linux >> (http://dpdk.org/doc/guides/linux_gsg/sys_reqs.html) >> >> Kernel version >= 2.6.34 >> >> I'd like to know if there is any reason to block DPDK build and run on >> older kernel version, i.e. 2.6.32, as carried on CentOS 6. where >> gcc=4.4. >> >> Could we just keep our CentOS 6 64bit x86_64 OS and continuing running >> 32bit applications with DPDK injected. >> >> or, there are good reasons *must* upgrade to CentOS 7, where >> kernel=3.10.0, gcc=4.8, and re-build applications to 64bit as well? > > The only issues I can think of are no huge page support and the igb_uio or > kernel components may not build. Having no huge page support can be a > performance hit, but you should use ?no-huge option. I know some people have > it building on older kernels, but it has been many revs back. > >> >> Thanks a lot! >> >> >> James > > Regards, > Keith >
