On 05/25/2010 01:24 PM, Stefan Hajnoczi wrote:
This patch adds trace events for virtqueue operations including adding/removing buffers, notifying the guest, and receiving a notify from the guest. diff --git a/trace-events b/trace-events index 48415f8..a533414 100644 --- a/trace-events +++ b/trace-events @@ -35,6 +35,14 @@ qemu_memalign(size_t alignment, size_t size, void *ptr) "alignment %zu size %zu qemu_valloc(size_t size, void *ptr) "size %zu ptr %p" qemu_vfree(void *ptr) "ptr %p" +# hw/virtio.c +virtqueue_fill(void *vq, const void *elem, unsigned int len, unsigned int idx) "vq %p elem %p len %u idx %u" +virtqueue_flush(void *vq, unsigned int count) "vq %p count %u" +virtqueue_pop(void *vq, void *elem, unsigned int in_num, unsigned int out_num) "vq %p elem %p in_num %u out_num %u" +virtio_queue_notify(void *vdev, int n, void *vq) "vdev %p n %d vq %p" +virtio_irq(void *vq) "vq %p" +virtio_notify(void *vdev, void *vq) "vdev %p vq %p" +
Those %ps are more or less useless. We need better ways of identifying them.
Linux uses %pTYPE to pretty print arbitrary types. We could do something similar (not the same since we don't want our own printf implementation).
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