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bpf: lru: Refactor LRU map tests in map_perf_test

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One more LRU test will be added later in this patch series.
In this patch, we first move all existing LRU map tests into
a single syscall (connect) first so that the future new
LRU test can be added without hunting another syscall.

One of the map name is also changed from percpu_lru_hash_map
to nocommon_lru_hash_map to avoid the confusion with percpu_hash_map.

Signed-off-by: Martin KaFai Lau <kafai@fb.com>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Martin KaFai Lau 2017-04-14 10:30:27 -07:00 • committed by David S. Miller
parent 6467acbc70
commit bf8db5d243
2 changed files with 69 additions and 31 deletions
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47
samples/bpf/map_perf_test_kern.c
View file

@ -26,7 +26,7 @@ struct bpf_map_def SEC("maps") lru_hash_map = {
.max_entries = 10000,
};
struct bpf_map_def SEC("maps") percpu_lru_hash_map = {
struct bpf_map_def SEC("maps") nocommon_lru_hash_map = {
.type = BPF_MAP_TYPE_LRU_HASH,
.key_size = sizeof(u32),
.value_size = sizeof(long),
@ -100,6 +100,7 @@ int stress_percpu_hmap(struct pt_regs *ctx)
bpf_map_delete_elem(&percpu_hash_map, &key);
return 0;
}
SEC("kprobe/sys_getgid")
int stress_hmap_alloc(struct pt_regs *ctx)
{
@ -128,24 +129,42 @@ int stress_percpu_hmap_alloc(struct pt_regs *ctx)
return 0;
}
SEC("kprobe/sys_getpid")
SEC("kprobe/sys_connect")
int stress_lru_hmap_alloc(struct pt_regs *ctx)
{
u32 key = bpf_get_prandom_u32();
struct sockaddr_in6 *in6;
u16 test_case, dst6[8];
int addrlen, ret;
char fmt[] = "Failed at stress_lru_hmap_alloc. ret:%d\n";
long val = 1;
bpf_map_update_elem(&lru_hash_map, &key, &val, BPF_ANY);
return 0;
}
SEC("kprobe/sys_getppid")
int stress_percpu_lru_hmap_alloc(struct pt_regs *ctx)
{
u32 key = bpf_get_prandom_u32();
long val = 1;
bpf_map_update_elem(&percpu_lru_hash_map, &key, &val, BPF_ANY);
in6 = (struct sockaddr_in6 *)PT_REGS_PARM2(ctx);
addrlen = (int)PT_REGS_PARM3(ctx);
if (addrlen != sizeof(*in6))
return 0;
ret = bpf_probe_read(dst6, sizeof(dst6), &in6->sin6_addr);
if (ret)
goto done;
if (dst6[0] != 0xdead || dst6[1] != 0xbeef)
return 0;
test_case = dst6[7];
if (test_case == 0)
ret = bpf_map_update_elem(&lru_hash_map, &key, &val, BPF_ANY);
else if (test_case == 1)
ret = bpf_map_update_elem(&nocommon_lru_hash_map, &key, &val,
BPF_ANY);
else
ret = -EINVAL;
done:
if (ret)
bpf_trace_printk(fmt, sizeof(fmt), ret);
return 0;
}