Add statistic tracking for operations in IOAT. Signed-off-by: Conor Walsh <conor.wa...@intel.com> Reviewed-by: Kevin Laatz <kevin.la...@intel.com> --- doc/guides/dmadevs/ioat.rst | 23 ++++++++++++++++++ drivers/dma/ioat/ioat_dmadev.c | 43 ++++++++++++++++++++++++++++++++++ 2 files changed, 66 insertions(+)
diff --git a/doc/guides/dmadevs/ioat.rst b/doc/guides/dmadevs/ioat.rst index 42ecf1fb57..69f3c56a7a 100644 --- a/doc/guides/dmadevs/ioat.rst +++ b/doc/guides/dmadevs/ioat.rst @@ -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_dma_fill()`` function rather than the ``rte_dma_copy()`` function. + +Querying Device Statistics +~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +The statistics from the IOAT dmadev device can be got via the +``rte_dma_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 completed by the device (both successful and failed). +* ``errors``: The number of operations that failed. + +The stats function can be used as follows: + +.. code-block:: C + + struct rte_dma_stats stats; + if (rte_dma_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); + } diff --git a/drivers/dma/ioat/ioat_dmadev.c b/drivers/dma/ioat/ioat_dmadev.c index fc89babc4a..f596637da4 100644 --- a/drivers/dma/ioat/ioat_dmadev.c +++ b/drivers/dma/ioat/ioat_dmadev.c @@ -77,6 +77,9 @@ ioat_vchan_setup(struct rte_dma_dev *dev, uint16_t vchan __rte_unused, ioat->offset = 0; ioat->failure = 0; + /* Reset Stats. */ + ioat->stats = (struct rte_dma_stats){0}; + /* Configure descriptor ring - each one points to next. */ for (i = 0; i < ioat->qcfg.nb_desc; i++) { ioat->desc_ring[i].next = ioat->ring_addr + @@ -208,6 +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; } @@ -336,6 +341,10 @@ ioat_dev_dump(const struct rte_dma_dev *dev, FILE *f) fprintf(f, " Dest: 0x%"PRIx64"\n", ioat->desc_ring[ioat->next_read & mask].dest_addr); fprintf(f, " Next: 0x%"PRIx64"\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; } @@ -425,6 +434,9 @@ ioat_completed(struct rte_dma_dev *dev, uint16_t qid __rte_unused, const uint16_ *last_idx = ioat->next_read - 2; } + ioat->stats.completed += count; + ioat->stats.errors += fails; + return count; } @@ -475,9 +487,38 @@ ioat_completed_status(struct rte_dma_dev *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_dma_dev *dev, uint16_t vchan __rte_unused, + struct rte_dma_stats *rte_stats, uint32_t size) +{ + struct rte_dma_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_dma_dev *dev, uint16_t vchan __rte_unused) +{ + struct ioat_dmadev *ioat = dev->dev_private; + + ioat->stats = (struct rte_dma_stats){0}; + return 0; +} + /* Create a DMA device. */ static int ioat_dmadev_create(const char *name, struct rte_pci_device *dev) @@ -489,6 +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, }; -- 2.25.1