From: David S. Miller Date: Thu, 24 Aug 2017 18:59:37 +0000 (-0700) Subject: Merge branch 'xdp-more-work-on-xdp-tracepoints' X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=e7d12ce121aa474ea6984ea1255a7bd85c09454f;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git Merge branch 'xdp-more-work-on-xdp-tracepoints' Jesper Dangaard Brouer says: ==================== xdp: more work on xdp tracepoints More work on streamlining and performance optimizing the tracepoints for XDP. I've created a simple xdp_monitor application that uses this tracepoint, and prints statistics. Available at github: https://github.com/netoptimizer/prototype-kernel/blob/master/kernel/samples/bpf/xdp_monitor_kern.c https://github.com/netoptimizer/prototype-kernel/blob/master/kernel/samples/bpf/xdp_monitor_user.c The improvement over tracepoint with strcpy: 9810372 - 8428762 = +1381610 pps faster - (1/9810372 - 1/8428762)*10^9 = -16.7 nanosec - 100-(8428762/9810372*100) = strcpy-trace is 14.08% slower - 981037/8428762*100 = removing strcpy made it 11.64% faster V3: Fix merge conflict with commit e4a8e817d3cb ("bpf: misc xdp redirect cleanups") V2: Change trace_xdp_redirect() to align with args of trace_xdp_exception() ==================== Signed-off-by: David S. Miller --- e7d12ce121aa474ea6984ea1255a7bd85c09454f