Re: [PATCH v3 3/3] kvm: Support for querying fd-based stats

[Paolo Bonzini]

On 1/31/22 20:43, Mark Kanda wrote:

+    for (i = 0; i < header->num_desc; ++i) {
+        struct kvm_stats_desc *pdesc = (void *)stats_desc + i * size_desc;
+        size_data = pdesc->size * sizeof(uint64_t);
+
+        uint64_t *stats_data = g_malloc(size_data);
+
+        ret = pread(stats_fd, stats_data, size_data,
+                    header->data_offset + pdesc->offset);

How hard would it be to cache the descriptors?  Ideally, a query-stats 
command would do only one pread.

Paolo