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ringtest: use link-time optimization

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By using -flto and -fwhole-program, all functions from the ring implementation
can be treated as static and possibly inlined.  Force this to happen through
the GCC flatten attribute.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Paolo Bonzini
2016-10-06 11:39:10 +02:00
committed by Michael S. Tsirkin
parent 8424af5336
commit 44d65ea161
2 changed files with 4 additions and 4 deletions
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4
tools/virtio/ringtest/Makefile
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@@ -3,8 +3,8 @@ all:
all: ring virtio_ring_0_9 virtio_ring_poll virtio_ring_inorder ptr_ring noring all: ring virtio_ring_0_9 virtio_ring_poll virtio_ring_inorder ptr_ring noring
CFLAGS += -Wall CFLAGS += -Wall
CFLAGS += -pthread -O2 -ggdb CFLAGS += -pthread -O2 -ggdb -flto -fwhole-program
LDFLAGS += -pthread -O2 -ggdb LDFLAGS += -pthread -O2 -ggdb -flto -fwhole-program
main.o: main.c main.h main.o: main.c main.h
ring.o: ring.c main.h ring.o: ring.c main.h

4
tools/virtio/ringtest/main.c
View File

@@ -96,7 +96,7 @@ void set_affinity(const char *arg)
assert(!ret); assert(!ret);
} }
static void run_guest(void) static void __attribute__((__flatten__)) run_guest(void)
{ {
int completed_before; int completed_before;
int completed = 0; int completed = 0;
@@ -149,7 +149,7 @@ static void run_guest(void)
} }
} }
static void run_host(void) static void __attribute__((__flatten__)) run_host(void)
{ {
int completed_before; int completed_before;
int completed = 0; int completed = 0;