From 11eeb26b9aabfeae344b4e6bc7368b963c492eda Mon Sep 17 00:00:00 2001 From: Ian Gulliver Date: Thu, 18 Feb 2016 10:45:04 -0800 Subject: [PATCH] Detect timestamp regression. --- python/check_mhz.py | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-) diff --git a/python/check_mhz.py b/python/check_mhz.py index 440ae94..4d270df 100755 --- a/python/check_mhz.py +++ b/python/check_mhz.py @@ -9,9 +9,12 @@ import adsblib if len(sys.argv) != 3: print('Usage: %s ' % sys.argv[0]) +print('Fetching samples...') + advertised_mhz = None start_time = None start_timestamp = None +last_timestamp = None for i, event in enumerate(adsblib.GetEvents(sys.argv[1], sys.argv[2])): advertised_mhz = event.get('mlat_timestamp_mhz', advertised_mhz) @@ -22,12 +25,19 @@ for i, event in enumerate(adsblib.GetEvents(sys.argv[1], sys.argv[2])): start_time = time.time() start_timestamp = event['mlat_timestamp'] + if last_timestamp: + if event['mlat_timestamp'] < last_timestamp: + print('\rERROR: timestamp went backwards (%d -> %d)\x1b[K' % + (last_timestamp, event['mlat_timestamp'])) + + last_timestamp = event['mlat_timestamp'] + if i % 1000 == 0 and start_time and advertised_mhz: time_diff = time.time() - start_time value_diff = event['mlat_timestamp'] - start_timestamp measured_mhz = value_diff / time_diff / 1000000 print( - '\r%d samples, %d seconds, advertised: %d MHz, measured: %d MHz' % + '\r%d samples, %d seconds, advertised: %d MHz, measured: %d MHz\x1b[K' % (i, time_diff, advertised_mhz, measured_mhz), end='', flush=True)