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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>
This commit is contained in:
Alexei Starovoitov 2016-03-08 15:07:53 -08:00 committed by David S. Miller
parent 9d8b612d88
commit 7dcc42b685
1 changed files with 9 additions and 0 deletions
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9
samples/bpf/spintest_kern.c
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@ -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; \
}