+ u32 normalized_start = (seg->start + f->nitems - f->tail) % f->nitems;
+ s = format (s, "[%u, %u], len %u, next %d, prev %d", normalized_start,
+ (normalized_start + seg->length) % f->nitems, seg->length,
+ seg->next, seg->prev);
+ return s;
+}
+
+u8 *
+svm_fifo_dump_trace (u8 * s, svm_fifo_t * f)
+{
+#if SVM_FIFO_TRACE
+ svm_fifo_trace_elem_t *seg = 0;
+ int i = 0;
+
+ if (f->trace)
+ {
+ vec_foreach (seg, f->trace)
+ {
+ s = format (s, "{%u, %u, %u}, ", seg->offset, seg->len, seg->action);
+ i++;
+ if (i % 5 == 0)
+ s = format (s, "\n");
+ }
+ s = format (s, "\n");
+ }
+ return s;
+#else
+ return 0;
+#endif
+}
+
+u8 *
+svm_fifo_replay (u8 * s, svm_fifo_t * f, u8 no_read, u8 verbose)
+{
+ int i, trace_len;
+ u8 *data = 0;
+ svm_fifo_trace_elem_t *trace;
+ u32 offset;
+ svm_fifo_t *dummy_fifo;
+
+ if (!f)
+ return s;
+
+#if SVM_FIFO_TRACE
+ trace = f->trace;
+ trace_len = vec_len (trace);
+#else
+ trace = 0;
+ trace_len = 0;
+#endif
+
+ dummy_fifo = svm_fifo_create (f->nitems);
+ memset (f->data, 0xFF, f->nitems);
+
+ vec_validate (data, f->nitems);
+ for (i = 0; i < vec_len (data); i++)
+ data[i] = i;
+
+ for (i = 0; i < trace_len; i++)
+ {
+ offset = trace[i].offset;
+ if (trace[i].action == 1)
+ {
+ if (verbose)
+ s = format (s, "adding [%u, %u]:", trace[i].offset,
+ (trace[i].offset +
+ trace[i].len) % dummy_fifo->nitems);
+ svm_fifo_enqueue_with_offset (dummy_fifo, trace[i].offset,
+ trace[i].len, &data[offset]);
+ }
+ else if (trace[i].action == 2)
+ {
+ if (verbose)
+ s = format (s, "adding [%u, %u]:", 0, trace[i].len);
+ svm_fifo_enqueue_nowait (dummy_fifo, trace[i].len, &data[offset]);
+ }
+ else if (!no_read)
+ {
+ if (verbose)
+ s = format (s, "read: %u", trace[i].len);
+ svm_fifo_dequeue_drop (dummy_fifo, trace[i].len);
+ }
+ if (verbose)
+ s = format (s, "%U", format_svm_fifo, dummy_fifo, 1);
+ }
+
+ s = format (s, "result: %U", format_svm_fifo, dummy_fifo, 1);