1. 11 2月, 2017 3 次提交
  2. 25 1月, 2017 1 次提交
  3. 24 1月, 2017 1 次提交
  4. 16 11月, 2016 1 次提交
    • M
      bpf: Add tests for the LRU bpf_htab · 5db58faf
      Martin KaFai Lau 提交于
      This patch has some unit tests and a test_lru_dist.
      
      The test_lru_dist reads in the numeric keys from a file.
      The files used here are generated by a modified fio-genzipf tool
      originated from the fio test suit.  The sample data file can be
      found here: https://github.com/iamkafai/bpf-lru
      
      The zipf.* data files have 100k numeric keys and the key is also
      ranged from 1 to 100k.
      
      The test_lru_dist outputs the number of unique keys (nr_unique).
      F.e. The following means, 61239 of them is unique out of 100k keys.
      nr_misses means it cannot be found in the LRU map, so nr_misses
      must be >= nr_unique. test_lru_dist also simulates a perfect LRU
      map as a comparison:
      
      [root@arch-fb-vm1 ~]# ~/devshare/fb-kernel/linux/samples/bpf/test_lru_dist \
      /root/zipf.100k.a1_01.out 4000 1
      ...
      test_parallel_lru_dist (map_type:9 map_flags:0x0):
          task:0 BPF LRU: nr_unique:23093(/100000) nr_misses:31603(/100000)
          task:0 Perfect LRU: nr_unique:23093(/100000 nr_misses:34328(/100000)
      ....
      test_parallel_lru_dist (map_type:9 map_flags:0x2):
          task:0 BPF LRU: nr_unique:23093(/100000) nr_misses:31710(/100000)
          task:0 Perfect LRU: nr_unique:23093(/100000 nr_misses:34328(/100000)
      
      [root@arch-fb-vm1 ~]# ~/devshare/fb-kernel/linux/samples/bpf/test_lru_dist \
      /root/zipf.100k.a0_01.out 40000 1
      ...
      test_parallel_lru_dist (map_type:9 map_flags:0x0):
          task:0 BPF LRU: nr_unique:61239(/100000) nr_misses:67054(/100000)
          task:0 Perfect LRU: nr_unique:61239(/100000 nr_misses:66993(/100000)
      ...
      test_parallel_lru_dist (map_type:9 map_flags:0x2):
          task:0 BPF LRU: nr_unique:61239(/100000) nr_misses:67068(/100000)
          task:0 Perfect LRU: nr_unique:61239(/100000 nr_misses:66993(/100000)
      
      LRU map has also been added to map_perf_test:
      /* Global LRU */
      [root@kerneltest003.31.prn1 ~]# for i in 1 4 8; do echo -n "$i cpus: "; \
      ./map_perf_test 16 $i | awk '{r += $3}END{print r " updates"}'; done
       1 cpus: 2934082 updates
       4 cpus: 7391434 updates
       8 cpus: 6500576 updates
      
      /* Percpu LRU */
      [root@kerneltest003.31.prn1 ~]# for i in 1 4 8; do echo -n "$i cpus: "; \
      ./map_perf_test 32 $i | awk '{r += $3}END{print r " updates"}'; done
        1 cpus: 2896553 updates
        4 cpus: 9766395 updates
        8 cpus: 17460553 updates
      Signed-off-by: NMartin KaFai Lau <kafai@fb.com>
      Acked-by: NAlexei Starovoitov <ast@kernel.org>
      Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      5db58faf
  5. 18 10月, 2016 1 次提交
    • D
      bpf: add initial suite for selftests · 5aa5bd14
      Daniel Borkmann 提交于
      Add a start of a test suite for kernel selftests. This moves test_verifier
      and test_maps over to tools/testing/selftests/bpf/ along with various
      code improvements and also adds a script for invoking test_bpf module.
      The test suite can simply be run via selftest framework, f.e.:
      
        # cd tools/testing/selftests/bpf/
        # make
        # make run_tests
      
      Both test_verifier and test_maps were kind of misplaced in samples/bpf/
      directory and we were looking into adding them to selftests for a while
      now, so it can be picked up by kbuild bot et al and hopefully also get
      more exposure and thus new test case additions.
      Signed-off-by: NDaniel Borkmann <daniel@iogearbox.net>
      Acked-by: NAlexei Starovoitov <ast@kernel.org>
      Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      5aa5bd14