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[Qemu-devel] [PATCH 12/14] trace: Trace virtqueue operations
From: |
Stefan Hajnoczi |
Subject: |
[Qemu-devel] [PATCH 12/14] trace: Trace virtqueue operations |
Date: |
Mon, 30 Aug 2010 14:27:14 +0100 |
This patch adds trace events for virtqueue operations including
adding/removing buffers, notifying the guest, and receiving a notify
from the guest.
Signed-off-by: Stefan Hajnoczi <address@hidden>
---
hw/virtio.c | 8 ++++++++
trace-events | 8 ++++++++
2 files changed, 16 insertions(+), 0 deletions(-)
diff --git a/hw/virtio.c b/hw/virtio.c
index 4475bb3..a5741ae 100644
--- a/hw/virtio.c
+++ b/hw/virtio.c
@@ -13,6 +13,7 @@
#include <inttypes.h>
+#include "trace.h"
#include "virtio.h"
#include "sysemu.h"
@@ -205,6 +206,8 @@ void virtqueue_fill(VirtQueue *vq, const VirtQueueElement
*elem,
unsigned int offset;
int i;
+ trace_virtqueue_fill(vq, elem, len, idx);
+
offset = 0;
for (i = 0; i < elem->in_num; i++) {
size_t size = MIN(len - offset, elem->in_sg[i].iov_len);
@@ -232,6 +235,7 @@ void virtqueue_flush(VirtQueue *vq, unsigned int count)
{
/* Make sure buffer is written before we update index. */
wmb();
+ trace_virtqueue_flush(vq, count);
vring_used_idx_increment(vq, count);
vq->inuse -= count;
}
@@ -422,6 +426,7 @@ int virtqueue_pop(VirtQueue *vq, VirtQueueElement *elem)
vq->inuse++;
+ trace_virtqueue_pop(vq, elem, elem->in_num, elem->out_num);
return elem->in_num + elem->out_num;
}
@@ -560,6 +565,7 @@ int virtio_queue_get_num(VirtIODevice *vdev, int n)
void virtio_queue_notify(VirtIODevice *vdev, int n)
{
if (n < VIRTIO_PCI_QUEUE_MAX && vdev->vq[n].vring.desc) {
+ trace_virtio_queue_notify(vdev, n, &vdev->vq[n]);
vdev->vq[n].handle_output(vdev, &vdev->vq[n]);
}
}
@@ -597,6 +603,7 @@ VirtQueue *virtio_add_queue(VirtIODevice *vdev, int
queue_size,
void virtio_irq(VirtQueue *vq)
{
+ trace_virtio_irq(vq);
vq->vdev->isr |= 0x01;
virtio_notify_vector(vq->vdev, vq->vector);
}
@@ -609,6 +616,7 @@ void virtio_notify(VirtIODevice *vdev, VirtQueue *vq)
(vq->inuse || vring_avail_idx(vq) != vq->last_avail_idx)))
return;
+ trace_virtio_notify(vdev, vq);
vdev->isr |= 0x01;
virtio_notify_vector(vdev, vq->vector);
}
diff --git a/trace-events b/trace-events
index de6479e..29580a5 100644
--- a/trace-events
+++ b/trace-events
@@ -38,6 +38,14 @@ disable qemu_memalign(size_t alignment, size_t size, void
*ptr) "alignment %zu s
disable qemu_valloc(size_t size, void *ptr) "size %zu ptr %p"
disable qemu_vfree(void *ptr) "ptr %p"
+# hw/virtio.c
+disable virtqueue_fill(void *vq, const void *elem, unsigned int len, unsigned
int idx) "vq %p elem %p len %u idx %u"
+disable virtqueue_flush(void *vq, unsigned int count) "vq %p count %u"
+disable virtqueue_pop(void *vq, void *elem, unsigned int in_num, unsigned int
out_num) "vq %p elem %p in_num %u out_num %u"
+disable virtio_queue_notify(void *vdev, int n, void *vq) "vdev %p n %d vq %p"
+disable virtio_irq(void *vq) "vq %p"
+disable virtio_notify(void *vdev, void *vq) "vdev %p vq %p"
+
# block.c
disable multiwrite_cb(void *mcb, int ret) "mcb %p ret %d"
disable bdrv_aio_multiwrite(void *mcb, int num_callbacks, int num_reqs) "mcb
%p num_callbacks %d num_reqs %d"
--
1.7.1
- [Qemu-devel] [PATCH 00/14 v2] trace: Add static tracing to QEMU, Stefan Hajnoczi, 2010/08/30
- [Qemu-devel] [PATCH 12/14] trace: Trace virtqueue operations,
Stefan Hajnoczi <=
- [Qemu-devel] [PATCH 10/14] trace: Trace qemu_malloc() and qemu_vmalloc(), Stefan Hajnoczi, 2010/08/30
- [Qemu-devel] [PATCH 06/14] trace: Add trace-file command to open/close/flush trace file, Stefan Hajnoczi, 2010/08/30
- [Qemu-devel] [PATCH 11/14] trace: Trace virtio-blk, multiwrite, and paio_submit, Stefan Hajnoczi, 2010/08/30
- [Qemu-devel] [PATCH 02/14] trace: Add simple built-in tracing backend, Stefan Hajnoczi, 2010/08/30
- [Qemu-devel] [PATCH 03/14] trace: Support for dynamically enabling/disabling trace events, Stefan Hajnoczi, 2010/08/30
- [Qemu-devel] [PATCH 07/14] trace: Add trace file name command-line option, Stefan Hajnoczi, 2010/08/30
- [Qemu-devel] [PATCH 08/14] trace: Add LTTng Userspace Tracer backend, Stefan Hajnoczi, 2010/08/30
- [Qemu-devel] [PATCH 01/14] trace: Add trace-events file for declaring trace events, Stefan Hajnoczi, 2010/08/30