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Commit 7dcc42b6 authored by Alexei Starovoitov's avatar Alexei Starovoitov Committed by David S. Miller
Browse files

samples/bpf: stress test bpf_get_stackid 



increase stress by also calling bpf_get_stackid() from
various *spin* functions

Signed-off-by: default avatarAlexei Starovoitov <ast@kernel.org>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 9d8b612d

samples/bpf/spintest_kern.c

+9 −0
Original line number Diff line number Diff line
@@ -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; \

}