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| author | Teng Qin | 2018-03-06 19:55:02 +0100 |
|---|---|---|
| committer | Daniel Borkmann | 2018-03-08 02:22:34 +0100 |
| commit | 12fe12253c56a26e591ceefbdf0998b391022003 (patch) | |
| tree | 822b9bb7680c97b84f98f8d471b297637048d473 /samples/bpf/trace_event_user.c | |
| parent | bpf: add support to read sample address in bpf program (diff) | |
| download | kernel-qcow2-linux-12fe12253c56a26e591ceefbdf0998b391022003.tar.gz kernel-qcow2-linux-12fe12253c56a26e591ceefbdf0998b391022003.tar.xz kernel-qcow2-linux-12fe12253c56a26e591ceefbdf0998b391022003.zip | |
samples/bpf: add example to test reading address
This commit adds additional test in the trace_event example, by
attaching the bpf program to MEM_UOPS_RETIRED.LOCK_LOADS event with
PERF_SAMPLE_ADDR requested, and print the lock address value read from
the bpf program to trace_pipe.
Signed-off-by: Teng Qin <qinteng@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Diffstat (limited to 'samples/bpf/trace_event_user.c')
| -rw-r--r-- | samples/bpf/trace_event_user.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/samples/bpf/trace_event_user.c b/samples/bpf/trace_event_user.c index bf4f1b6d9a52..56f7a259a7c9 100644 --- a/samples/bpf/trace_event_user.c +++ b/samples/bpf/trace_event_user.c @@ -215,6 +215,17 @@ static void test_bpf_perf_event(void) /* Intel Instruction Retired */ .config = 0xc0, }; + struct perf_event_attr attr_type_raw_lock_load = { + .sample_freq = SAMPLE_FREQ, + .freq = 1, + .type = PERF_TYPE_RAW, + /* Intel MEM_UOPS_RETIRED.LOCK_LOADS */ + .config = 0x21d0, + /* Request to record lock address from PEBS */ + .sample_type = PERF_SAMPLE_ADDR, + /* Record address value requires precise event */ + .precise_ip = 2, + }; printf("Test HW_CPU_CYCLES\n"); test_perf_event_all_cpu(&attr_type_hw); @@ -236,6 +247,10 @@ static void test_bpf_perf_event(void) test_perf_event_all_cpu(&attr_type_raw); test_perf_event_task(&attr_type_raw); + printf("Test Lock Load\n"); + test_perf_event_all_cpu(&attr_type_raw_lock_load); + test_perf_event_task(&attr_type_raw_lock_load); + printf("*** PASS ***\n"); } |