From b0ac429f1346e9fa13206d748bedc9bd497a55bc Mon Sep 17 00:00:00 2001 From: Paolo Bonzini Date: Thu, 1 Jun 2017 15:54:47 +0200 Subject: [PATCH] virtio: add virtqueue_alloc_element tracepoint This tracepoint can help diagnosing failures due to memory fragmentation in the guest. Signed-off-by: Paolo Bonzini Reviewed-by: Michael S. Tsirkin Signed-off-by: Michael S. Tsirkin --- hw/virtio/trace-events | 1 + hw/virtio/virtio.c | 1 + 2 files changed, 2 insertions(+) diff --git a/hw/virtio/trace-events b/hw/virtio/trace-events index 1f7a7c1ae1..e24d8fa997 100644 --- a/hw/virtio/trace-events +++ b/hw/virtio/trace-events @@ -1,6 +1,7 @@ # See docs/tracing.txt for syntax documentation. # hw/virtio/virtio.c +virtqueue_alloc_element(void *elem, size_t sz, unsigned in_num, unsigned out_num) "elem %p size %zd in_num %u out_num %u" 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" diff --git a/hw/virtio/virtio.c b/hw/virtio/virtio.c index f99d99fd78..464947f76d 100644 --- a/hw/virtio/virtio.c +++ b/hw/virtio/virtio.c @@ -815,6 +815,7 @@ static void *virtqueue_alloc_element(size_t sz, unsigned out_num, unsigned in_nu assert(sz >= sizeof(VirtQueueElement)); elem = g_malloc(out_sg_end); + trace_virtqueue_alloc_element(elem, sz, in_num, out_num); elem->out_num = out_num; elem->in_num = in_num; elem->in_addr = (void *)elem + in_addr_ofs; -- 2.11.0