From a70ab99712ff5aceda3594e58eecfb8a48924908 Mon Sep 17 00:00:00 2001
From: jkim <jkim@FreeBSD.org>
Date: Mon, 25 Aug 2008 23:36:24 +0000
Subject: Add a trivial bpf filter benchmark.

---
 tools/regression/bpf/bpf_filter/Makefile   | 10 ++++++++--
 tools/regression/bpf/bpf_filter/bpf_test.c | 17 ++++++++++++++---
 2 files changed, 22 insertions(+), 5 deletions(-)

(limited to 'tools')

diff --git a/tools/regression/bpf/bpf_filter/Makefile b/tools/regression/bpf/bpf_filter/Makefile
index f6e2330..5be486d 100644
--- a/tools/regression/bpf/bpf_filter/Makefile
+++ b/tools/regression/bpf/bpf_filter/Makefile
@@ -26,7 +26,9 @@ SRCS=		${.CURDIR}/bpf_test.c
 
 CFLAGS+=	-g -fno-builtin-abort -I${.CURDIR}/tests
 
-.if defined(LOG_LEVEL)
+.if defined(BPF_BENCHMARK)
+CFLAGS+=	-DBPF_BENCHMARK -DLOG_LEVEL=0
+.elif defined(LOG_LEVEL)
 CFLAGS+=	-DLOG_LEVEL="${LOG_LEVEL}"
 .endif
 
@@ -51,10 +53,14 @@ ${TEST}:	${.CURDIR}/tests/${TEST}.h ${SRCS}
 
 all:		${TEST_CASES}
 .for TEST in ${TEST_CASES}
-.if !defined(LOG_LEVEL) || (${LOG_LEVEL} > 0)
+.if defined(BPF_BENCHMARK) || !defined(LOG_LEVEL) || (${LOG_LEVEL} > 0)
 	@${ECHO} -n "${TEST}:	"
 .endif
+.if defined(BPF_BENCHMARK)
+	@-time ${.CURDIR}/${TEST}
+.else
 	@-${.CURDIR}/${TEST}
+.endif
 	@rm -f ${.CURDIR}/${TEST}
 .endfor
 
diff --git a/tools/regression/bpf/bpf_filter/bpf_test.c b/tools/regression/bpf/bpf_filter/bpf_test.c
index f031d77..31a2043 100644
--- a/tools/regression/bpf/bpf_filter/bpf_test.c
+++ b/tools/regression/bpf/bpf_filter/bpf_test.c
@@ -44,6 +44,12 @@ __FBSDID("$FreeBSD$");
 #define	LOG_LEVEL	1
 #endif
 
+#ifdef BPF_BENCHMARK
+#define	BPF_NRUNS	10000000
+#else
+#define	BPF_NRUNS	1
+#endif
+
 static void	sig_handler(int);
 
 static int	nins = sizeof(pc) / sizeof(pc[0]);
@@ -57,7 +63,7 @@ static u_int
 bpf_compile_and_filter(void)
 {
 	bpf_jit_filter	*filter;
-	u_int		ret;
+	u_int		i, ret;
 
 	/* Do not use BPF JIT compiler for an empty program */
 	if (nins == 0)
@@ -72,7 +78,8 @@ bpf_compile_and_filter(void)
 		exit(FATAL);
 	}
 
-	ret = (*(filter->func))(pkt, wirelen, buflen);
+	for (i = 0; i < BPF_NRUNS; i++)
+		ret = (*(filter->func))(pkt, wirelen, buflen);
 
 	bpf_destroy_jit_filter(filter);
 
@@ -148,6 +155,9 @@ bpf_validate(const struct bpf_insn *f, int len)
 int
 main(void)
 {
+#if !defined(BPF_JIT_COMPILER)
+	u_int	i;
+#endif
 	u_int   ret;
 	int     sig;
 #ifdef BPF_VALIDATE
@@ -178,7 +188,8 @@ main(void)
 #ifdef BPF_JIT_COMPILER
 	ret = bpf_compile_and_filter();
 #else
-	ret = bpf_filter(pc, pkt, wirelen, buflen);
+	for (i = 0; i < BPF_NRUNS; i++)
+		ret = bpf_filter(pc, pkt, wirelen, buflen);
 #endif
 	if (ret != expect) {
 		if (verbose > 1)
-- 
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