[U-Boot] [PATCH 5/5] test/py: mmc: Add 'mmc read' performance check

[Marek Vasut <marek.vasut@gmail.com>]

Add option to the mmc rd test to check the duration of the
execution of the mmc read command. This allows intercepting
read performance regressions.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Tom Rini <trini@konsulko.com>
Cc: Simon Glass <sjg@chromium.org>
---
 test/py/tests/test_mmc_rd.py | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/test/py/tests/test_mmc_rd.py b/test/py/tests/test_mmc_rd.py
index aba512adfe..2dc715bb51 100644
--- a/test/py/tests/test_mmc_rd.py
+++ b/test/py/tests/test_mmc_rd.py
@@ -6,6 +6,7 @@
 # read if the test configuration contains a CRC of the expected data.
 
 import pytest
+import time
 import u_boot_utils
 
 """
@@ -187,6 +188,7 @@ def test_mmc_rd(u_boot_console, env__mmc_rd_config):
     sector = env__mmc_rd_config.get('sector', 0)
     count_sectors = env__mmc_rd_config.get('count', 1)
     expected_crc32 = env__mmc_rd_config.get('crc32', None)
+    read_duration_max = env__mmc_rd_config.get('read_duration_max', 0)
 
     count_bytes = count_sectors * 512
     bcfg = u_boot_console.config.buildconfig
@@ -213,7 +215,9 @@ def test_mmc_rd(u_boot_console, env__mmc_rd_config):
 
     # Read data
     cmd = 'mmc read %s %x %x' % (addr, sector, count_sectors)
+    tstart = time.time()
     response = u_boot_console.run_command(cmd)
+    tend = time.time()
     good_response = 'MMC read: dev # %d, block # %d, count %d ... %d blocks read: OK' % (
         devid, sector, count_sectors, count_sectors)
     assert good_response in response
@@ -226,3 +230,10 @@ def test_mmc_rd(u_boot_console, env__mmc_rd_config):
             assert expected_crc32 in response
         else:
             u_boot_console.log.warning('CONFIG_CMD_CRC32 != y: Skipping check')
+
+    # Check if the command did not take too long
+    if read_duration_max:
+        elapsed = tend - tstart
+        u_boot_console.log.info('Reading %d bytes took %f seconds' %
+                                (count_bytes, elapsed))
+        assert elapsed <= (read_duration_max - 0.01)
-- 
2.20.1