On Wed, 17 Apr 2019 at 19:51, Ivan Khoronzhuk <ivan.khoronzhuk@xxxxxxxxxx> wrote: > > This patchset is RFC adding XDP support for TI cpsw driver that is > based on page_pool allocator. It was verified with af_xdp sockets > and on xdp drop. For XDP redirect to another interface it's under > verification, still not sure about all cases that should be verified. > Also regular tests with iperf2 were done in order to verify impact on > regular netstack performance, compared with base commit from > net-next/master: 432bc230700f86801cffa5e159e05dea6229f722 > > It was verified with following configs enabled: > CONFIG_JIT=y > CONFIG_BPFILTER=y > CONFIG_BPF_SYSCALL=y > CONFIG_XDP_SOCKETS=y > CONFIG_BPF_EVENTS=y > CONFIG_HAVE_EBPF_JIT=y > CONFIG_BPF_JIT=y > CONFIG_CGROUP_BPF=y > > iperf2 UDP RX summary (packet size / Mbps): > +--------------------------------------------------------------+ > | pkt_size/rate | 1024 | 1500 | 1470 | 64 | 128 | 512 | 256 | > |---------------+------+------+------+------+------+-----+-----| > | base commit | 561 | 470 | 796 | 35 | 70.1 | 281 | 140 | > |---------------+------+------+------+------+------+-----+-----| > | XDP patched | 563 | 455 | 808 | 35 | 70.2 | 282 | 141 | > +--------------------------------------------------------------+ > > iperf2 UDP TX summary (packet size / Mbps): > +--------------------------------------------------------------+ > | pkt_size/rate | 1024 | 1500 | 1470 | 64 | 128 | 512 | 256 | > |---------------+------+------+------+------+------+-----+-----| > | base commit | 555 | 666 | 736 | 34.5 | 70.3 | 281 | 140 | > |---------------+------+------+------+------+------+-----+-----| > | XDP patched | 558 | 696 | 759 | 35.2 | 69.2 | 279 | 140 | > +--------------------------------------------------------------+ > > iperf2 TCP summary (window size / Mbps): > +------------------------------------------------------------+ > | window size/rate | 16 | 32 | 64 | 128 | 8 | 256 | > |------------------+------+------+------+------+------+------| > | base commit | 753 | 887 | 931 | 932 | 676 | 932 | > |------------------+------+------+------+------+------+------| > | XDP patched | 823 | 888 | 932 | 933 | 669 | 933 | > +------------------------------------------------------------+ > > For af_xdp socket type verification several generic changes should be added > that can be seen here (rough fixes, for samples related seems like last version > of samples is more integrated with libbpf api, so should be rebased, > witch I will send as RFC separately): > https://github.com/ikhorn/af_xdp_stuff/tree/af_xdp_armv7 > More XDP support, yay! As for mmap/AF_XDP on 32-bit systems; Instead of hacking the if_xdp.h, mmap2 should be used. Have a look at the libbpf code here [1] Björn [1] https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git/tree/tools/lib/bpf/xsk.c#n81 > Ivan Khoronzhuk (3): > net: ethernet: ti: davinci_cpdma: add dma mapped submit > net: ethernet: ti: davinci_cpdma: return handler status > net: ethernet: ti: cpsw: add XDP support > > drivers/net/ethernet/ti/Kconfig | 1 + > drivers/net/ethernet/ti/cpsw.c | 552 +++++++++++++++++++++--- > drivers/net/ethernet/ti/davinci_cpdma.c | 117 +++-- > drivers/net/ethernet/ti/davinci_cpdma.h | 6 +- > drivers/net/ethernet/ti/davinci_emac.c | 18 +- > 5 files changed, 591 insertions(+), 103 deletions(-) > > -- > 2.17.1 >
