linux_dsm_epyc7002/samples/bpf
Ingo Molnar 4e06d4f083 perf/urgent fixes and one improvement:
Fixes:
 
 - Fix prev/next_prio formatting for deadline tasks in libtraceevent (Daniel Bristot de Oliveira)
 
 - Robustify reading of build-ids from /sys/kernel/note (Arnaldo Carvalho de Melo)
 
 - Fix building some sample/bpf in Alpine Linux 3.4 (Arnaldo Carvalho de Melo)
 
 - Fix 'make install-bin' to install libtraceevent plugins (Arnaldo Carvalho de Melo)
 
 - Fix 'perf record --switch-output' documentation and comment (Jiri Olsa)
 
 - 'perf probe' fixes for cross arch probing (Masami Hiramatsu)
 
 Improvement:
 
 - Show total scheduling time in 'perf sched timehist' (Namhyumg Kim)
 
 Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v2
 
 iQIcBAABCAAGBQJYbS6KAAoJENZQFvNTUqpAWqkP/1xdvbDqeTA2YjcWG+ffQJye
 LULSNQpRShvBGpB3zsOzOebOtw0R5oWb7YAp4JFZNyMIk5qcnS9gVwdw9Qx1lc/W
 Gq8OuhI28Pr9AHE37eTJ1+12HI2aAOylwKFqUpEWMzoaUqBDRh5JV2MeVGVQXBRe
 YBJ4Qwk1a7Ng74uzN/pdiC6V7pjddPEoLZEDG5p35vrgtNAY1JGlX5rvNR7CO6nN
 72QHRnB4r1d9fgNGS5oO5zEU1q5+JN5phe+gDANdk/8pCqDegRjZpHnj5gcm71jr
 mEvbstmlV1XPZSA9aFVu2L5LZuv6asS02HjrbGydqO2DUTpDgrynHsjAuqqaTnwk
 kLGwA2I+Kyh8g155H+HrQANONe2TTOXRkBVWIoFBWkhd1JUS/p3GE2qvqx5N36sr
 U26d9i/Bk/pbOYOdRUFMc4lckZY2HrrRWj8dVr06qLr2rlbYoLv8hpqvdyHr9MJS
 Id2Yqqd1JVzBDU3/+GfdFDBjltVtpSG1mdc6LWy9IpXFMJoSOQNsrbjf+mgMadeV
 EbtY8MdDZ525EB8niv9E9Vfd56LiWTKCjg9Mc758+U+Ns50YlQFsDq2hBO2+jQ/k
 W3QNX+WJiLgxqQK8adveXoYgCSWPNVttIvg8Lj1KNk8Y//vUC1KSrvDfaKiROzLB
 iF0u5mLRAQ+Pfec6X5PP
 =o9KL
 -----END PGP SIGNATURE-----

Merge tag 'perf-urgent-for-mingo-4.10-20170104' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/urgent

Pull perf/urgent fixes and one improvement from Arnaldo Carvalho de Melo:

Fixes:

  - Fix prev/next_prio formatting for deadline tasks in libtraceevent (Daniel Bristot de Oliveira)

  - Robustify reading of build-ids from /sys/kernel/note (Arnaldo Carvalho de Melo)

  - Fix building some sample/bpf in Alpine Linux 3.4 (Arnaldo Carvalho de Melo)

  - Fix 'make install-bin' to install libtraceevent plugins (Arnaldo Carvalho de Melo)

  - Fix 'perf record --switch-output' documentation and comment (Jiri Olsa)

  - Fix 'perf probe' for cross arch probing (Masami Hiramatsu)

Improvement:

  - Show total scheduling time in 'perf sched timehist' (Namhyumg Kim)

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-01-05 08:33:02 +01:00
..
bpf_helpers.h bpf: xdp: Add XDP example for head adjustment 2016-12-08 14:25:13 -05:00
bpf_load.c samples/bpf: Remove perf_event_open() declaration 2016-12-20 12:00:40 -03:00
bpf_load.h samples/bpf: Make samples more libbpf-centric 2016-12-15 16:25:47 -03:00
cgroup_helpers.c samples, bpf: Refactor test_current_task_under_cgroup - separate out helpers 2016-12-03 16:07:11 -05:00
cgroup_helpers.h samples, bpf: Refactor test_current_task_under_cgroup - separate out helpers 2016-12-03 16:07:11 -05:00
fds_example.c samples/bpf: Move open_raw_sock to separate header 2016-12-20 12:00:40 -03:00
lathist_kern.c bpf: BPF based latency tracing 2015-06-23 06:09:58 -07:00
lathist_user.c samples/bpf: Make samples more libbpf-centric 2016-12-15 16:25:47 -03:00
libbpf.h samples/bpf: Move open_raw_sock to separate header 2016-12-20 12:00:40 -03:00
lwt_len_hist_kern.c bpf: Add tests and samples for LWT-BPF 2016-12-02 10:52:00 -05:00
lwt_len_hist_user.c samples/bpf: Make samples more libbpf-centric 2016-12-15 16:25:47 -03:00
lwt_len_hist.sh bpf: Add tests and samples for LWT-BPF 2016-12-02 10:52:00 -05:00
Makefile Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2016-12-23 16:49:12 -08:00
map_perf_test_kern.c bpf: Add tests for the LRU bpf_htab 2016-11-15 11:50:43 -05:00
map_perf_test_user.c bpf: Add tests for the LRU bpf_htab 2016-11-15 11:50:43 -05:00
offwaketime_kern.c bpf, samples: don't zero data when not needed 2016-04-14 21:40:42 -04:00
offwaketime_user.c samples/bpf: Make samples more libbpf-centric 2016-12-15 16:25:47 -03:00
parse_ldabs.c bpf: fix samples to add fake KBUILD_MODNAME 2016-10-29 14:46:12 -04:00
parse_simple.c bpf: fix samples to add fake KBUILD_MODNAME 2016-10-29 14:46:12 -04:00
parse_varlen.c bpf: fix samples to add fake KBUILD_MODNAME 2016-10-29 14:46:12 -04:00
README.rst samples/bpf: Switch over to libbpf 2016-12-20 12:00:38 -03:00
sampleip_kern.c bpf/samples: Fix PT_REGS_IP on s390x and use it 2016-11-28 16:26:46 -05:00
sampleip_user.c samples/bpf: Remove perf_event_open() declaration 2016-12-20 12:00:40 -03:00
sock_example.c samples/bpf: Move open_raw_sock to separate header 2016-12-20 12:00:40 -03:00
sock_example.h samples/bpf sock_example: Avoid getting ethhdr from two includes 2016-12-27 21:49:17 -03:00
sock_flags_kern.c samples/bpf: add userspace example for prohibiting sockets 2016-12-02 13:46:09 -05:00
sockex1_kern.c samples: bpf: add skb->field examples and tests 2015-03-15 22:02:28 -04:00
sockex1_user.c samples/bpf: Move open_raw_sock to separate header 2016-12-20 12:00:40 -03:00
sockex2_kern.c samples/bpf: fix sockex2 example 2016-11-24 16:04:52 -05:00
sockex2_user.c samples/bpf: Move open_raw_sock to separate header 2016-12-20 12:00:40 -03:00
sockex3_kern.c bpf samples: fix compiler errors with sockex2 and sockex3 2016-09-27 03:48:58 -04:00
sockex3_user.c samples/bpf: Move open_raw_sock to separate header 2016-12-20 12:00:40 -03:00
spintest_kern.c samples/bpf: Enable powerpc support 2016-04-06 16:01:29 -04:00
spintest_user.c samples/bpf: Make samples more libbpf-centric 2016-12-15 16:25:47 -03:00
tc_l2_redirect_kern.c bpf: Add test for bpf_redirect to ipip/ip6tnl 2016-11-12 23:38:07 -05:00
tc_l2_redirect_user.c samples/bpf: Make samples more libbpf-centric 2016-12-15 16:25:47 -03:00
tc_l2_redirect.sh bpf: Add test for bpf_redirect to ipip/ip6tnl 2016-11-12 23:38:07 -05:00
tcbpf1_kern.c bpf: fix samples to add fake KBUILD_MODNAME 2016-10-29 14:46:12 -04:00
tcbpf2_kern.c bpf: fix samples to add fake KBUILD_MODNAME 2016-10-29 14:46:12 -04:00
test_cgrp2_array_pin.c samples/bpf: Make samples more libbpf-centric 2016-12-15 16:25:47 -03:00
test_cgrp2_attach2.c samples/bpf: Switch over to libbpf 2016-12-20 12:00:38 -03:00
test_cgrp2_attach.c samples/bpf: Switch over to libbpf 2016-12-20 12:00:38 -03:00
test_cgrp2_sock2.c samples/bpf: add userspace example for prohibiting sockets 2016-12-02 13:46:09 -05:00
test_cgrp2_sock2.sh samples/bpf: add userspace example for prohibiting sockets 2016-12-02 13:46:09 -05:00
test_cgrp2_sock.c samples/bpf: Switch over to libbpf 2016-12-20 12:00:38 -03:00
test_cgrp2_sock.sh samples: bpf: add userspace example for modifying sk_bound_dev_if 2016-12-02 13:46:08 -05:00
test_cgrp2_tc_kern.c bpf: fix samples to add fake KBUILD_MODNAME 2016-10-29 14:46:12 -04:00
test_cgrp2_tc.sh cgroup: bpf: Add an example to do cgroup checking in BPF 2016-07-01 16:32:13 -04:00
test_cls_bpf.sh samples/bpf: add 'pointer to packet' tests 2016-05-06 16:01:54 -04:00
test_current_task_under_cgroup_kern.c samples/bpf: Add test_current_task_under_cgroup test 2016-08-12 21:49:42 -07:00
test_current_task_under_cgroup_user.c samples/bpf: Make samples more libbpf-centric 2016-12-15 16:25:47 -03:00
test_ipip.sh samples/bpf: add comprehensive ipip, ipip6, ip6ip6 test 2016-09-17 10:13:07 -04:00
test_lru_dist.c samples/bpf: Make samples more libbpf-centric 2016-12-15 16:25:47 -03:00
test_lwt_bpf.c bpf: Add tests and samples for LWT-BPF 2016-12-02 10:52:00 -05:00
test_lwt_bpf.sh bpf: Add tests and samples for LWT-BPF 2016-12-02 10:52:00 -05:00
test_overhead_kprobe_kern.c samples/bpf: add tracepoint vs kprobe performance tests 2016-04-07 21:04:27 -04:00
test_overhead_tp_kern.c samples/bpf: add tracepoint vs kprobe performance tests 2016-04-07 21:04:27 -04:00
test_overhead_user.c samples/bpf: add tracepoint vs kprobe performance tests 2016-04-07 21:04:27 -04:00
test_probe_write_user_kern.c samples/bpf: Add test/example of using bpf_probe_write_user bpf helper 2016-07-25 18:07:48 -07:00
test_probe_write_user_user.c samples/bpf: Make samples more libbpf-centric 2016-12-15 16:25:47 -03:00
test_tunnel_bpf.sh samples/bpf: extend test_tunnel_bpf.sh with IPIP test 2016-09-17 10:13:07 -04:00
trace_event_kern.c bpf/samples: Fix PT_REGS_IP on s390x and use it 2016-11-28 16:26:46 -05:00
trace_event_user.c samples/bpf: Remove perf_event_open() declaration 2016-12-20 12:00:40 -03:00
trace_output_kern.c samples/bpf: fix trace_output example 2016-04-28 17:29:45 -04:00
trace_output_user.c samples/bpf trace_output_user: Remove duplicate sys/ioctl.h include 2016-12-28 10:47:13 -03:00
tracex1_kern.c bpf, samples: don't zero data when not needed 2016-04-14 21:40:42 -04:00
tracex1_user.c samples/bpf: Add simple non-portable kprobe filter example 2015-04-02 13:25:50 +02:00
tracex2_kern.c bpf, samples: don't zero data when not needed 2016-04-14 21:40:42 -04:00
tracex2_user.c samples/bpf: Make samples more libbpf-centric 2016-12-15 16:25:47 -03:00
tracex3_kern.c samples/bpf: update tracex[23] examples to use per-cpu maps 2016-02-06 03:34:36 -05:00
tracex3_user.c samples/bpf: Make samples more libbpf-centric 2016-12-15 16:25:47 -03:00
tracex4_kern.c samples/bpf: Enable powerpc support 2016-04-06 16:01:29 -04:00
tracex4_user.c samples/bpf: Make samples more libbpf-centric 2016-12-15 16:25:47 -03:00
tracex5_kern.c bpf samples: update tracex5 sample to use __seccomp_filter 2016-09-27 03:48:58 -04:00
tracex5_user.c bpf samples: update tracex5 sample to use __seccomp_filter 2016-09-27 03:48:58 -04:00
tracex6_kern.c bpf: fix build warnings and add function read_trace_pipe() 2015-08-12 16:39:12 -07:00
tracex6_user.c samples/bpf: Remove perf_event_open() declaration 2016-12-20 12:00:40 -03:00
xdp1_kern.c bpf: make xdp sample variable names more meaningful 2016-07-20 22:07:24 -07:00
xdp1_user.c samples/bpf: Make samples more libbpf-centric 2016-12-15 16:25:47 -03:00
xdp2_kern.c bpf: make xdp sample variable names more meaningful 2016-07-20 22:07:24 -07:00
xdp_tx_iptunnel_common.h bpf: xdp: Add XDP example for head adjustment 2016-12-08 14:25:13 -05:00
xdp_tx_iptunnel_kern.c bpf: xdp: Add XDP example for head adjustment 2016-12-08 14:25:13 -05:00
xdp_tx_iptunnel_user.c samples/bpf: Make samples more libbpf-centric 2016-12-15 16:25:47 -03:00

eBPF sample programs
====================

This directory contains a test stubs, verifier test-suite and examples
for using eBPF. The examples use libbpf from tools/lib/bpf.

Build dependencies
==================

Compiling requires having installed:
 * clang >= version 3.4.0
 * llvm >= version 3.7.1

Note that LLVM's tool 'llc' must support target 'bpf', list version
and supported targets with command: ``llc --version``

Kernel headers
--------------

There are usually dependencies to header files of the current kernel.
To avoid installing devel kernel headers system wide, as a normal
user, simply call::

 make headers_install

This will creates a local "usr/include" directory in the git/build top
level directory, that the make system automatically pickup first.

Compiling
=========

For building the BPF samples, issue the below command from the kernel
top level directory::

 make samples/bpf/

Do notice the "/" slash after the directory name.

It is also possible to call make from this directory.  This will just
hide the the invocation of make as above with the appended "/".

Manually compiling LLVM with 'bpf' support
------------------------------------------

Since version 3.7.0, LLVM adds a proper LLVM backend target for the
BPF bytecode architecture.

By default llvm will build all non-experimental backends including bpf.
To generate a smaller llc binary one can use::

 -DLLVM_TARGETS_TO_BUILD="BPF"

Quick sniplet for manually compiling LLVM and clang
(build dependencies are cmake and gcc-c++)::

 $ git clone http://llvm.org/git/llvm.git
 $ cd llvm/tools
 $ git clone --depth 1 http://llvm.org/git/clang.git
 $ cd ..; mkdir build; cd build
 $ cmake .. -DLLVM_TARGETS_TO_BUILD="BPF;X86"
 $ make -j $(getconf _NPROCESSORS_ONLN)

It is also possible to point make to the newly compiled 'llc' or
'clang' command via redefining LLC or CLANG on the make command line::

 make samples/bpf/ LLC=~/git/llvm/build/bin/llc CLANG=~/git/llvm/build/bin/clang