@@ -189,3 +189,26 @@ of memory is overwritten, or filled, with a short pattern of data.
Fill operations can be performed in much the same was as copy operations
described above, just using the ``rte_dmadev_fill()`` function rather
than the ``rte_dmadev_copy()`` function.
+
+Querying Device Statistics
+~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+The statistics from the IOAT dmadev device can be got via the
+``rte_dmadev_stats_get()`` API in the ``rte_dmadev`` library.
+
+The statistics returned for each IOAT device are:
+
+* ``submitted``: The number of operations submitted to the device.
+* ``completed``: The number of operations successfully completed by the device.
+* ``errors``: The number of operations that failed.
+
+The stats function can be used as follows:
+
+.. code-block:: C
+
+ struct rte_dmadev_stats stats;
+ if (rte_dmadev_stats_get(dmadev_id, vchan, &stats) >= 0) {
+ printf("Total submitted ops: %lu", stats.submitted);
+ printf("Total completed ops: %lu", stats.completed);
+ printf("Total failed ops: %lu", stats.errors);
+ }
@@ -211,6 +211,8 @@ __submit(struct ioat_dmadev *ioat)
{
*ioat->doorbell = ioat->next_write - ioat->offset;
+ ioat->stats.submitted += (uint16_t)(ioat->next_write - ioat->last_write);
+
ioat->last_write = ioat->next_write;
}
@@ -339,6 +341,10 @@ ioat_dev_dump(const struct rte_dmadev *dev, FILE *f)
fprintf(f, " Dest: %#lx\n", ioat->desc_ring[ioat->next_read & mask].dest_addr);
fprintf(f, " Next: %#lx\n", ioat->desc_ring[ioat->next_read & mask].next);
fprintf(f, " }\n");
+ fprintf(f, " Key Stats { submitted: %"PRIu64", comp: %"PRIu64", failed: %"PRIu64" }\n",
+ ioat->stats.submitted,
+ ioat->stats.completed,
+ ioat->stats.errors);
return 0;
}
@@ -428,6 +434,9 @@ ioat_completed(struct rte_dmadev *dev, uint16_t qid __rte_unused, const uint16_t
*last_idx = ioat->next_read - 2;
}
+ ioat->stats.completed += count;
+ ioat->stats.errors += fails;
+
return count;
}
@@ -478,9 +487,38 @@ ioat_completed_status(struct rte_dmadev *dev, uint16_t qid __rte_unused,
*last_idx = ioat->next_read - 1;
+ ioat->stats.completed += count;
+ ioat->stats.errors += fails;
+
return count;
}
+/* Retrieve the generic stats of a DMA device. */
+static int
+ioat_stats_get(const struct rte_dmadev *dev, uint16_t vchan __rte_unused,
+ struct rte_dmadev_stats *rte_stats, uint32_t size)
+{
+ struct rte_dmadev_stats *stats = (&((struct ioat_dmadev *)dev->dev_private)->stats);
+
+ if (size < sizeof(rte_stats))
+ return -EINVAL;
+ if (rte_stats == NULL)
+ return -EINVAL;
+
+ *rte_stats = *stats;
+ return 0;
+}
+
+/* Reset the generic stat counters for the DMA device. */
+static int
+ioat_stats_reset(struct rte_dmadev *dev, uint16_t vchan __rte_unused)
+{
+ struct ioat_dmadev *ioat = dev->dev_private;
+
+ memset(&ioat->stats, 0, sizeof(ioat->stats));
+ return 0;
+}
+
/* Create a DMA device. */
static int
ioat_dmadev_create(const char *name, struct rte_pci_device *dev)
@@ -492,6 +530,8 @@ ioat_dmadev_create(const char *name, struct rte_pci_device *dev)
.dev_info_get = ioat_dev_info_get,
.dev_start = ioat_dev_start,
.dev_stop = ioat_dev_stop,
+ .stats_get = ioat_stats_get,
+ .stats_reset = ioat_stats_reset,
.vchan_setup = ioat_vchan_setup,
};