Tried on 3.12, both of them are undefined. Anyway, will comment them out and see what performance it could achieve.
> -----Original Message----- > From: John W. Linville [mailto:linville at tuxdriver.com] > Sent: Saturday, July 12, 2014 1:41 AM > To: Zhou, Danny > Cc: dev at dpdk.org > Subject: Re: [dpdk-dev] [PATCH] librte_pmd_packet: add PMD for > AF_PACKET-based virtual devices > > On Fri, Jul 11, 2014 at 05:20:42PM +0000, Zhou, Danny wrote: > > Looks like you used a pretty new kernel version with new socket options > > that old > kernel like my 3.12 does not support. When I tried this patch, it just cannot > build, and > compiler complains like below. Which Linux distribution does this patch work > for? > How to ensure it works for old kernels? > > > > /home/danny/dpdk.org/dpdk/lib/librte_pmd_packet/rte_eth_packet.c: In > > function > rte_pmd_init_internals: > > /home/danny/dpdk.org/dpdk/lib/librte_pmd_packet/rte_eth_packet.c:524:1 > > 7: error: PACKET_FANOUT_FLAG_ROLLOVER undeclared (first use in this > > function) > > /home/danny/dpdk.org/dpdk/lib/librte_pmd_packet/rte_eth_packet.c:524:1 > > 7: note: each undeclared identifier is reported only once for each > > function it appears in > > /home/danny/dpdk.org/dpdk/lib/librte_pmd_packet/rte_eth_packet.c:557:3 > > 3: error: PACKET_QDISC_BYPASS undeclared (first use in this function) > > Both of them are isolated, so for playing with it you could just comment > those out. > It looks like PACKET_FANOUT_FLAG_ROLLOVER should have been in 3.10, while > PACKET_QDISC_BYPASS didn't show-up until 3.14... > > /home/linville/git/linux > [linville-x1.hq.tuxdriver.com]:> git annotate include/uapi/linux/if_packet.h > | grep > PACKET_FANOUT_FLAG_ROLLOVER > 77f65ebdca506 (Willem de Bruijn 2013-03-19 10:18:11 +0000 > 64)#define > PACKET_FANOUT_FLAG_ROLLOVER 0x1000 > > /home/linville/git/linux > [linville-x1.hq.tuxdriver.com]:> git show -s --format=short 77f65ebdca506 > commit > 77f65ebdca506870d99bfabe52bde222511022ec > Author: Willem de Bruijn <willemb at google.com> > > packet: packet fanout rollover during socket overload > > /home/linville/git/linux > [linville-x1.hq.tuxdriver.com]:> git describe --contains 77f65ebdca506 > v3.10-rc1~66^2~423 > > /home/linville/git/linux > [linville-x1.hq.tuxdriver.com]:> git annotate include/uapi/linux/if_packet.h > | grep > PACKET_QDISC_BYPASS > d346a3fae3ff1 (Daniel Borkmann 2013-12-06 11:36:17 +0100 > 56)#define > PACKET_QDISC_BYPASS 20 > > /home/linville/git/linux > [linville-x1.hq.tuxdriver.com]:> git show -s --format=short d346a3fae3ff1 > commit > d346a3fae3ff1d99f5d0c819bf86edf9094a26a1 > Author: Daniel Borkmann <dborkman at redhat.com> > > packet: introduce PACKET_QDISC_BYPASS socket option > > /home/linville/git/linux > [linville-x1.hq.tuxdriver.com]:> git describe --contains d346a3fae3ff1 > v3.14-rc1~94^2~564 > > Is there an example of code in DPDK that requires specific kernel versions? > What is > the preferred method for coding such dependencies? > > John > -- > John W. Linville Someday the world will need a hero, and you > linville at tuxdriver.com might be all we have. Be ready.
