在 2021/7/12 下午6:35, Jonah Palmer 写道:

+void hmp_virtio_queue_status(Monitor *mon, const QDict *qdict)
+{
+    Error *err = NULL;
+    const char *path = qdict_get_try_str(qdict, "path");
+    int queue = qdict_get_int(qdict, "queue");
+    VirtQueueStatus *s = qmp_x_debug_virtio_queue_status(path, queue, &err);
+
+    if (err != NULL) {
+        hmp_handle_error(mon, err);
+        return;
+    }
+
+    monitor_printf(mon, "%s:\n", path);
+    monitor_printf(mon, "  device_type:          %s\n",
+                   VirtioType_str(s->device_type));
+    monitor_printf(mon, "  index:                %d\n", s->queue_index);
+    monitor_printf(mon, "  inuse:                %d\n", s->inuse);
+    monitor_printf(mon, "  last_avail_idx:       %d (%"PRId64" %% %"PRId64")\n",
+                   s->last_avail_idx, s->last_avail_idx % s->vring_num,
+                   s->vring_num);
+    monitor_printf(mon, "  shadow_avail_idx:     %d (%"PRId64" %% %"PRId64")\n",
+                   s->shadow_avail_idx, s->shadow_avail_idx % s->vring_num,
+                   s->vring_num);
+    monitor_printf(mon, "  used_idx:             %d (%"PRId64" %% %"PRId64")\n",
+                   s->used_idx, s->used_idx % s->vring_num, s->vring_num);

The modular information is not the case of packed ring where the queue size does not have to be a power of 2.

Doesn't modulo work for any integer, regardless if it's a power of 2 or not? Could you clarify this for me?

Thank you,

Jonah

Thanks

+    monitor_printf(mon, "  signalled_used:       %d (%"PRId64" %% %"PRId64")\n",
+                   s->signalled_used, s->signalled_used % s->vring_num,
+                   s->vring_num);
+    monitor_printf(mon, "  signalled_used_valid: %d\n", s->signalled_used_valid);
+    monitor_printf(mon, "  VRing:\n");
+    monitor_printf(mon, "    num:         %"PRId64"\n", s->vring_num);
+    monitor_printf(mon, "    num_default: %"PRId64"\n", s->vring_num_default);
+    monitor_printf(mon, "    align:       %"PRId64"\n", s->vring_align);
+    monitor_printf(mon, "    desc:        0x%016"PRIx64"\n", s->vring_desc);
+    monitor_printf(mon, "    avail:       0x%016"PRIx64"\n", s->vring_avail);
+    monitor_printf(mon, "    used:        0x%016"PRIx64"\n", s->vring_used);
+
+    qapi_free_VirtQueueStatus(s);