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authorbrakmo <brakmo@fb.com>2019-03-01 23:38:49 +0300
committerAlexei Starovoitov <ast@kernel.org>2019-03-02 21:48:27 +0300
commita1270fe95b74eb3195b107c494ed1f11b932a278 (patch)
tree4e5c9ed3db58c84fc9bc094ef6a3f11d72147f89 /samples/bpf/Makefile
parent187d0738ff351f725a58be3d606d3a7fc8db8aed (diff)
downloadlinux-a1270fe95b74eb3195b107c494ed1f11b932a278.tar.xz
bpf: User program for testing HBM
The program nrm creates a cgroup and attaches a BPF program to the cgroup for testing HBM (Host Bandwidth Manager) for egress traffic. One still needs to create network traffic. This can be done through netesto, netperf or iperf3. A follow-up patch contains a script to create traffic. USAGE: hbm [-d] [-l] [-n <id>] [-r <rate>] [-s] [-t <secs>] [-w] [-h] [prog] Where: -d Print BPF trace debug buffer -l Also limit flows doing loopback -n <#> To create cgroup "/hbm#" and attach prog. Default is /nrm1 This is convenient when testing HBM in more than 1 cgroup -r <rate> Rate limit in Mbps -s Get HBM stats (marked, dropped, etc.) -t <time> Exit after specified seconds (deault is 0) -w Work conserving flag. cgroup can increase its bandwidth beyond the rate limit specified while there is available bandwidth. Current implementation assumes there is only NIC (eth0), but can be extended to support multiple NICs. Currrently only supported for egress. Note, this is just a proof of concept. -h Print this info prog BPF program file name. Name defaults to hbm_out_kern.o More information about HBM can be found in the paper "BPF Host Resource Management" presented at the 2018 Linux Plumbers Conference, Networking Track (http://vger.kernel.org/lpc_net2018_talks/LPC%20BPF%20Network%20Resource%20Paper.pdf) Signed-off-by: Lawrence Brakmo <brakmo@fb.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'samples/bpf/Makefile')
-rw-r--r--samples/bpf/Makefile3
1 files changed, 3 insertions, 0 deletions
diff --git a/samples/bpf/Makefile b/samples/bpf/Makefile
index e1bdc96486f6..65e667bdf979 100644
--- a/samples/bpf/Makefile
+++ b/samples/bpf/Makefile
@@ -52,6 +52,7 @@ hostprogs-y += xdpsock
hostprogs-y += xdp_fwd
hostprogs-y += task_fd_query
hostprogs-y += xdp_sample_pkts
+hostprogs-y += hbm
# Libbpf dependencies
LIBBPF = $(TOOLS_PATH)/lib/bpf/libbpf.a
@@ -107,6 +108,7 @@ xdpsock-objs := xdpsock_user.o
xdp_fwd-objs := xdp_fwd_user.o
task_fd_query-objs := bpf_load.o task_fd_query_user.o $(TRACE_HELPERS)
xdp_sample_pkts-objs := xdp_sample_pkts_user.o $(TRACE_HELPERS)
+hbm-objs := bpf_load.o hbm.o $(CGROUP_HELPERS)
# Tell kbuild to always build the programs
always := $(hostprogs-y)
@@ -265,6 +267,7 @@ $(src)/*.c: verify_target_bpf $(LIBBPF)
$(obj)/tracex5_kern.o: $(obj)/syscall_nrs.h
$(obj)/hbm_out_kern.o: $(src)/hbm.h $(src)/hbm_kern.h
+$(obj)/hbm.o: $(src)/hbm.h
# asm/sysreg.h - inline assembly used by it is incompatible with llvm.
# But, there is no easy way to fix it, so just exclude it since it is