[PATCH v2] doc: update size parameter details

[Vipin Varghese <vipin.varghese@amd.com>]

For configuration parameters `mem_size` and `buf_size` are represented
as megabytes and bytes respectively in application. Update the
documentation and to represent the same.

V2 Changes:
 - add mem_size and buf_size in config.ini, suggested by Chengwen.

Signed-off-by: Vipin Varghese <vipin.varghese@amd.com>
---
---
 app/test-dma-perf/config.ini | 4 ++--
 doc/guides/tools/dmaperf.rst | 4 ++--
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/app/test-dma-perf/config.ini b/app/test-dma-perf/config.ini
index b550f4b23f..17aa91c22d 100644
--- a/app/test-dma-perf/config.ini
+++ b/app/test-dma-perf/config.ini
@@ -5,8 +5,8 @@
 ; Supported test types are DMA_MEM_COPY and CPU_MEM_COPY.
 
 ; Parameters:
-; "mem_size" denotes the size of the memory footprint.
-; "buf_size" denotes the memory size of a single operation.
+; "mem_size" denotes the size of the memory footprint in megabytes (MB) for source and destination.
+; "buf_size" denotes the memory size of a single operation in bytes (B).
 ; "dma_ring_size" denotes the dma ring buffer size. It should be must be a power of two, and between
 ;  64 and 4096.
 ; "kick_batch" denotes the dma operation batch size, and should be greater than 1 normally.
diff --git a/doc/guides/tools/dmaperf.rst b/doc/guides/tools/dmaperf.rst
index 9e3e78a6b7..6f85fceb8a 100644
--- a/doc/guides/tools/dmaperf.rst
+++ b/doc/guides/tools/dmaperf.rst
@@ -74,10 +74,10 @@ Configuration Parameters
   Currently supported types are ``DMA_MEM_COPY`` and ``CPU_MEM_COPY``.
 
 ``mem_size``
-  The size of the memory footprint.
+  The size of the memory footprint in megabytes (MB) for source and destination.
 
 ``buf_size``
-  The memory size of a single operation.
+  The memory size of a single operation in bytes (B).
 
 ``dma_ring_size``
   The DMA ring buffer size. Must be a power of two, and between ``64`` and ``4096``.
-- 
2.39.3