From 7dcc42b685b4acf7b2f3f08d157f1574e1bec7f7 Mon Sep 17 00:00:00 2001 From: Alexei Starovoitov Date: Tue, 8 Mar 2016 15:07:53 -0800 Subject: samples/bpf: stress test bpf_get_stackid increase stress by also calling bpf_get_stackid() from various *spin* functions Signed-off-by: Alexei Starovoitov Signed-off-by: David S. Miller --- samples/bpf/spintest_kern.c | 9 +++++++++ 1 file changed, 9 insertions(+) (limited to 'samples/bpf') 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 #include #include +#include #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; \ } -- cgit v1.2.3