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| author | Alexei Starovoitov <ast@fb.com> | 2016-03-08 15:07:53 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-03-08 23:22:02 -0500 |
| commit | 7dcc42b685b4acf7b2f3f08d157f1574e1bec7f7 (patch) | |
| tree | 7893ae0c100e957d8a172551c2d07c8e1eba48ac | |
| parent | 9d8b612d88e81c2cf7dbc0d4a827da6ca0d848e0 (diff) | |
| download | lwn-7dcc42b685b4acf7b2f3f08d157f1574e1bec7f7.tar.gz lwn-7dcc42b685b4acf7b2f3f08d157f1574e1bec7f7.zip | |
samples/bpf: stress test bpf_get_stackid
increase stress by also calling bpf_get_stackid() from
various *spin* functions
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | samples/bpf/spintest_kern.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/samples/bpf/spintest_kern.c b/samples/bpf/spintest_kern.c index ef8ac33bb2e9..4b27619d91a4 100644 --- a/samples/bpf/spintest_kern.c +++ b/samples/bpf/spintest_kern.c @@ -8,6 +8,7 @@ #include <linux/netdevice.h> #include <linux/version.h> #include <uapi/linux/bpf.h> +#include <uapi/linux/perf_event.h> #include "bpf_helpers.h" struct bpf_map_def SEC("maps") my_map = { @@ -23,6 +24,13 @@ struct bpf_map_def SEC("maps") my_map2 = { .max_entries = 1024, }; +struct bpf_map_def SEC("maps") stackmap = { + .type = BPF_MAP_TYPE_STACK_TRACE, + .key_size = sizeof(u32), + .value_size = PERF_MAX_STACK_DEPTH * sizeof(u64), + .max_entries = 10000, +}; + #define PROG(foo) \ int foo(struct pt_regs *ctx) \ { \ @@ -32,6 +40,7 @@ int foo(struct pt_regs *ctx) \ bpf_map_update_elem(&my_map, &v, &v, BPF_ANY); \ bpf_map_update_elem(&my_map2, &v, &v, BPF_ANY); \ bpf_map_delete_elem(&my_map2, &v); \ + bpf_get_stackid(ctx, &stackmap, BPF_F_REUSE_STACKID); \ return 0; \ } |