ping.
> This patch adds trace events for virtio-pmem functionality.
> Adding trace events for virtio pmem request, reponse and host
> side fsync functionality.
>
> Signed-off-by: Pankaj Gupta <pankaj.gupta.li...@gmail.com>
> ---
> hw/virtio/trace-events | 5 +++++
> hw/virtio/virtio-pmem.c | 4 ++++
> 2 files changed, 9 insertions(+)
>
> diff --git a/hw/virtio/trace-events b/hw/virtio/trace-events
> index 2060a144a2..c62727f879 100644
> --- a/hw/virtio/trace-events
> +++ b/hw/virtio/trace-events
> @@ -122,3 +122,8 @@ virtio_mem_unplug_all_request(void) ""
> virtio_mem_resized_usable_region(uint64_t old_size, uint64_t new_size)
> "old_size=0x%" PRIx64 "new_size=0x%" PRIx64
> virtio_mem_state_request(uint64_t addr, uint16_t nb_blocks) "addr=0x%"
> PRIx64 " nb_blocks=%" PRIu16
> virtio_mem_state_response(uint16_t state) "state=%" PRIu16
> +
> +# virtio-pmem.c
> +virtio_pmem_flush_request(void) "flush request"
> +virtio_pmem_response(void) "flush response"
> +virtio_pmem_flush_done(int type) "fsync return=%d"
> diff --git a/hw/virtio/virtio-pmem.c b/hw/virtio/virtio-pmem.c
> index ddb0125901..d83e973bf2 100644
> --- a/hw/virtio/virtio-pmem.c
> +++ b/hw/virtio/virtio-pmem.c
> @@ -24,6 +24,7 @@
> #include "sysemu/hostmem.h"
> #include "block/aio.h"
> #include "block/thread-pool.h"
> +#include "trace.h"
>
> typedef struct VirtIODeviceRequest {
> VirtQueueElement elem;
> @@ -41,6 +42,7 @@ static int worker_cb(void *opaque)
>
> /* flush raw backing image */
> err = fsync(req_data->fd);
> + trace_virtio_pmem_flush_done(err);
> if (err != 0) {
> err = 1;
> }
> @@ -59,6 +61,7 @@ static void done_cb(void *opaque, int ret)
> /* Callbacks are serialized, so no need to use atomic ops. */
> virtqueue_push(req_data->pmem->rq_vq, &req_data->elem, len);
> virtio_notify((VirtIODevice *)req_data->pmem, req_data->pmem->rq_vq);
> + trace_virtio_pmem_response();
> g_free(req_data);
> }
>
> @@ -69,6 +72,7 @@ static void virtio_pmem_flush(VirtIODevice *vdev, VirtQueue
> *vq)
> HostMemoryBackend *backend = MEMORY_BACKEND(pmem->memdev);
> ThreadPool *pool = aio_get_thread_pool(qemu_get_aio_context());
>
> + trace_virtio_pmem_flush_request();
> req_data = virtqueue_pop(vq, sizeof(VirtIODeviceRequest));
> if (!req_data) {
> virtio_error(vdev, "virtio-pmem missing request data");
> --
> 2.20.1
>
