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Date: Fri, 14 Apr 2017 10:30:27 -0700
From: Martin KaFai Lau <kafai@...com>
To: <netdev@...r.kernel.org>
CC: Alexei Starovoitov <ast@...com>,
Daniel Borkmann <daniel@...earbox.net>
Subject: [PATCH net-next 3/6] bpf: lru: Refactor LRU map tests in map_perf_test
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@...com>
Acked-by: Alexei Starovoitov <ast@...nel.org>
Acked-by: Daniel Borkmann <daniel@...earbox.net>
---
samples/bpf/map_perf_test_kern.c | 43 +++++++++++++++++++++++---------
samples/bpf/map_perf_test_user.c | 53 +++++++++++++++++++++++++++-------------
2 files changed, 67 insertions(+), 29 deletions(-)
diff --git a/samples/bpf/map_perf_test_kern.c b/samples/bpf/map_perf_test_kern.c
index 9da2a3441b0a..404ed53b8a53 100644
--- a/samples/bpf/map_perf_test_kern.c
+++ b/samples/bpf/map_perf_test_kern.c
@@ -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;
+ u32 key = bpf_get_prandom_u32();
- bpf_map_update_elem(&lru_hash_map, &key, &val, BPF_ANY);
+ in6 = (struct sockaddr_in6 *)PT_REGS_PARM2(ctx);
+ addrlen = (int)PT_REGS_PARM3(ctx);
- return 0;
-}
+ if (addrlen != sizeof(*in6))
+ 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;
+ 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;
- bpf_map_update_elem(&percpu_lru_hash_map, &key, &val, BPF_ANY);
+done:
+ if (ret)
+ bpf_trace_printk(fmt, sizeof(fmt), ret);
return 0;
}
diff --git a/samples/bpf/map_perf_test_user.c b/samples/bpf/map_perf_test_user.c
index e29ff318a793..51cb8f238aa2 100644
--- a/samples/bpf/map_perf_test_user.c
+++ b/samples/bpf/map_perf_test_user.c
@@ -18,6 +18,9 @@
#include <string.h>
#include <time.h>
#include <sys/resource.h>
+#include <arpa/inet.h>
+#include <errno.h>
+
#include "libbpf.h"
#include "bpf_load.h"
@@ -36,7 +39,7 @@ static __u64 time_get_ns(void)
#define HASH_KMALLOC (1 << 2)
#define PERCPU_HASH_KMALLOC (1 << 3)
#define LRU_HASH_PREALLOC (1 << 4)
-#define PERCPU_LRU_HASH_PREALLOC (1 << 5)
+#define NOCOMMON_LRU_HASH_PREALLOC (1 << 5)
#define LPM_KMALLOC (1 << 6)
#define HASH_LOOKUP (1 << 7)
#define ARRAY_LOOKUP (1 << 8)
@@ -55,28 +58,44 @@ static void test_hash_prealloc(int cpu)
cpu, MAX_CNT * 1000000000ll / (time_get_ns() - start_time));
}
-static void test_lru_hash_prealloc(int cpu)
+static void do_test_lru(int lru_test_flag, int cpu)
{
+ struct sockaddr_in6 in6 = { .sin6_family = AF_INET6 };
+ const char *test_name;
__u64 start_time;
- int i;
+ int i, ret;
+
+ in6.sin6_addr.s6_addr16[0] = 0xdead;
+ in6.sin6_addr.s6_addr16[1] = 0xbeef;
+
+ if (lru_test_flag & LRU_HASH_PREALLOC) {
+ test_name = "lru_hash_map_perf";
+ in6.sin6_addr.s6_addr16[7] = 0;
+ } else if (lru_test_flag & NOCOMMON_LRU_HASH_PREALLOC) {
+ test_name = "nocommon_lru_hash_map_perf";
+ in6.sin6_addr.s6_addr16[7] = 1;
+ } else {
+ assert(0);
+ }
start_time = time_get_ns();
- for (i = 0; i < MAX_CNT; i++)
- syscall(__NR_getpid);
- printf("%d:lru_hash_map_perf pre-alloc %lld events per sec\n",
- cpu, MAX_CNT * 1000000000ll / (time_get_ns() - start_time));
+ for (i = 0; i < MAX_CNT; i++) {
+ ret = connect(-1, (const struct sockaddr *)&in6, sizeof(in6));
+ assert(ret == -1 && errno == EBADF);
+ }
+ printf("%d:%s pre-alloc %lld events per sec\n",
+ cpu, test_name,
+ MAX_CNT * 1000000000ll / (time_get_ns() - start_time));
}
-static void test_percpu_lru_hash_prealloc(int cpu)
+static void test_lru_hash_prealloc(int cpu)
{
- __u64 start_time;
- int i;
+ do_test_lru(LRU_HASH_PREALLOC, cpu);
+}
- start_time = time_get_ns();
- for (i = 0; i < MAX_CNT; i++)
- syscall(__NR_getppid);
- printf("%d:lru_hash_map_perf pre-alloc %lld events per sec\n",
- cpu, MAX_CNT * 1000000000ll / (time_get_ns() - start_time));
+static void test_nocommon_lru_hash_prealloc(int cpu)
+{
+ do_test_lru(NOCOMMON_LRU_HASH_PREALLOC, cpu);
}
static void test_percpu_hash_prealloc(int cpu)
@@ -174,8 +193,8 @@ static void loop(int cpu)
if (test_flags & LRU_HASH_PREALLOC)
test_lru_hash_prealloc(cpu);
- if (test_flags & PERCPU_LRU_HASH_PREALLOC)
- test_percpu_lru_hash_prealloc(cpu);
+ if (test_flags & NOCOMMON_LRU_HASH_PREALLOC)
+ test_nocommon_lru_hash_prealloc(cpu);
if (test_flags & LPM_KMALLOC)
test_lpm_kmalloc(cpu);
--
2.9.3
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