tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
selftests/bpf: Add a test for a large global function
test results:
pyperf50 with always_inlined the same function five times: processed 46378 insns
pyperf50 with global function: processed 6102 insns
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Song Liu <songliubraving@fb.com>
Link: https://lore.kernel.org/bpf/20200110064124.1760511-5-ast@kernel.org
authored by
Alexei Starovoitov
and committed by
Daniel Borkmann
6db2d81a
7608e4db
+14
-2
+2
tools/testing/selftests/bpf/prog_tests/bpf_verif_scale.c
+2
tools/testing/selftests/bpf/prog_tests/bpf_verif_scale.c
···
48
48
{ "test_verif_scale2.o", BPF_PROG_TYPE_SCHED_CLS },
49
49
{ "test_verif_scale3.o", BPF_PROG_TYPE_SCHED_CLS },
50
50
51
+
{ "pyperf_global.o", BPF_PROG_TYPE_RAW_TRACEPOINT },
52
+
51
53
/* full unroll by llvm */
52
54
{ "pyperf50.o", BPF_PROG_TYPE_RAW_TRACEPOINT },
53
55
{ "pyperf100.o", BPF_PROG_TYPE_RAW_TRACEPOINT },
+7
-2
tools/testing/selftests/bpf/progs/pyperf.h
+7
-2
tools/testing/selftests/bpf/progs/pyperf.h
···
154
154
__uint(value_size, sizeof(long long) * 127);
155
155
} stackmap SEC(".maps");
156
156
157
-
static __always_inline int __on_event(struct pt_regs *ctx)
157
+
#ifdef GLOBAL_FUNC
158
+
__attribute__((noinline))
159
+
#else
160
+
static __always_inline
161
+
#endif
162
+
int __on_event(struct bpf_raw_tracepoint_args *ctx)
158
163
{
159
164
uint64_t pid_tgid = bpf_get_current_pid_tgid();
160
165
pid_t pid = (pid_t)(pid_tgid >> 32);
···
259
254
}
260
255
261
256
SEC("raw_tracepoint/kfree_skb")
262
-
int on_event(struct pt_regs* ctx)
257
+
int on_event(struct bpf_raw_tracepoint_args* ctx)
263
258
{
264
259
int i, ret = 0;
265
260
ret |= __on_event(ctx);