From: Alexei Starovoitov <ast@kernel.org>
To: <davem@davemloft.net>
Cc: <daniel@iogearbox.net>, <netdev@vger.kernel.org>,
<bpf@vger.kernel.org>, <kernel-team@fb.com>
Subject: [PATCH v3 bpf-next 4/6] selftests/bpf: Add a test for a large global function
Date: Thu, 9 Jan 2020 22:41:22 -0800 [thread overview]
Message-ID: <20200110064124.1760511-5-ast@kernel.org> (raw)
In-Reply-To: <20200110064124.1760511-1-ast@kernel.org>
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>
Acked-by: Song Liu <songliubraving@fb.com>
---
tools/testing/selftests/bpf/prog_tests/bpf_verif_scale.c | 2 ++
tools/testing/selftests/bpf/progs/pyperf.h | 9 +++++++--
tools/testing/selftests/bpf/progs/pyperf_global.c | 5 +++++
3 files changed, 14 insertions(+), 2 deletions(-)
create mode 100644 tools/testing/selftests/bpf/progs/pyperf_global.c
diff --git a/tools/testing/selftests/bpf/prog_tests/bpf_verif_scale.c b/tools/testing/selftests/bpf/prog_tests/bpf_verif_scale.c
index 9486c13af6b2..e9f2f12ba06b 100644
--- a/tools/testing/selftests/bpf/prog_tests/bpf_verif_scale.c
+++ b/tools/testing/selftests/bpf/prog_tests/bpf_verif_scale.c
@@ -48,6 +48,8 @@ void test_bpf_verif_scale(void)
{ "test_verif_scale2.o", BPF_PROG_TYPE_SCHED_CLS },
{ "test_verif_scale3.o", BPF_PROG_TYPE_SCHED_CLS },
+ { "pyperf_global.o", BPF_PROG_TYPE_RAW_TRACEPOINT },
+
/* full unroll by llvm */
{ "pyperf50.o", BPF_PROG_TYPE_RAW_TRACEPOINT },
{ "pyperf100.o", BPF_PROG_TYPE_RAW_TRACEPOINT },
diff --git a/tools/testing/selftests/bpf/progs/pyperf.h b/tools/testing/selftests/bpf/progs/pyperf.h
index 71d383cc9b85..e186899954e9 100644
--- a/tools/testing/selftests/bpf/progs/pyperf.h
+++ b/tools/testing/selftests/bpf/progs/pyperf.h
@@ -154,7 +154,12 @@ struct {
__uint(value_size, sizeof(long long) * 127);
} stackmap SEC(".maps");
-static __always_inline int __on_event(struct pt_regs *ctx)
+#ifdef GLOBAL_FUNC
+__attribute__((noinline))
+#else
+static __always_inline
+#endif
+int __on_event(struct bpf_raw_tracepoint_args *ctx)
{
uint64_t pid_tgid = bpf_get_current_pid_tgid();
pid_t pid = (pid_t)(pid_tgid >> 32);
@@ -254,7 +259,7 @@ static __always_inline int __on_event(struct pt_regs *ctx)
}
SEC("raw_tracepoint/kfree_skb")
-int on_event(struct pt_regs* ctx)
+int on_event(struct bpf_raw_tracepoint_args* ctx)
{
int i, ret = 0;
ret |= __on_event(ctx);
diff --git a/tools/testing/selftests/bpf/progs/pyperf_global.c b/tools/testing/selftests/bpf/progs/pyperf_global.c
new file mode 100644
index 000000000000..079e78a7562b
--- /dev/null
+++ b/tools/testing/selftests/bpf/progs/pyperf_global.c
@@ -0,0 +1,5 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright (c) 2020 Facebook */
+#define STACK_MAX_LEN 50
+#define GLOBAL_FUNC
+#include "pyperf.h"
--
2.23.0
next prev parent reply other threads:[~2020-01-10 6:41 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-10 6:41 [PATCH v3 bpf-next 0/6] bpf: Introduce global functions Alexei Starovoitov
2020-01-10 6:41 ` [PATCH v3 bpf-next 1/6] libbpf: Sanitize " Alexei Starovoitov
2020-01-10 6:41 ` [PATCH v3 bpf-next 2/6] bpf: Introduce function-by-function verification Alexei Starovoitov
2020-01-10 6:41 ` [PATCH v3 bpf-next 3/6] selftests/bpf: Add fexit-to-skb test for global funcs Alexei Starovoitov
2020-01-10 6:41 ` Alexei Starovoitov [this message]
2020-01-10 6:41 ` [PATCH v3 bpf-next 5/6] selftests/bpf: Modify a test to check global functions Alexei Starovoitov
2020-01-10 6:41 ` [PATCH v3 bpf-next 6/6] selftests/bpf: Add unit tests for " Alexei Starovoitov
2020-01-10 16:29 ` [PATCH v3 bpf-next 0/6] bpf: Introduce " Daniel Borkmann
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