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core_analyzer: support uniform VCD time intervals 

close #1236

Signed-off-by: Robert Jördens <rj@quartiq.de>
This commit is contained in:
Robert Jördens 2019-01-10 19:32:58 +01:00
parent 58e872e7b5
commit 101671fbbf
2 changed files with 30 additions and 8 deletions
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23
artiq/coredevice/comm_analyzer.py
View File

@ -501,11 +501,13 @@ def get_message_time(message):
return getattr(message, "timestamp", message.rtio_counter) return getattr(message, "timestamp", message.rtio_counter)
def decoded_dump_to_vcd(fileobj, devices, dump): def decoded_dump_to_vcd(fileobj, devices, dump, uniform_interval=False):
vcd_manager = VCDManager(fileobj) vcd_manager = VCDManager(fileobj)
ref_period = get_ref_period(devices) ref_period = get_ref_period(devices)
if ref_period is not None: if ref_period is not None:
vcd_manager.set_timescale_ps(ref_period*1e12) if not uniform_interval:
vcd_manager.set_timescale_ps(ref_period*1e12)
else: else:
logger.warning("unable to determine core device ref_period") logger.warning("unable to determine core device ref_period")
ref_period = 1e-9 # guess ref_period = 1e-9 # guess
@ -527,6 +529,12 @@ def decoded_dump_to_vcd(fileobj, devices, dump):
vcd_log_channels = get_vcd_log_channels(dump.log_channel, messages) vcd_log_channels = get_vcd_log_channels(dump.log_channel, messages)
channel_handlers[dump.log_channel] = LogHandler( channel_handlers[dump.log_channel] = LogHandler(
vcd_manager, vcd_log_channels) vcd_manager, vcd_log_channels)
if uniform_interval:
# RTIO event timestamp in machine units
timestamp = vcd_manager.get_channel("timestamp", 64)
# RTIO time interval between this and the next timed event
# in SI seconds
interval = vcd_manager.get_channel("interval", 64)
slack = vcd_manager.get_channel("rtio_slack", 64) slack = vcd_manager.get_channel("rtio_slack", 64)
vcd_manager.set_time(0) vcd_manager.set_time(0)
@ -536,11 +544,18 @@ def decoded_dump_to_vcd(fileobj, devices, dump):
if start_time: if start_time:
break break
for message in messages: t0 = 0
for i, message in enumerate(messages):
if message.channel in channel_handlers: if message.channel in channel_handlers:
t = get_message_time(message) - start_time t = get_message_time(message) - start_time
if t >= 0: if t >= 0:
vcd_manager.set_time(t) if uniform_interval:
interval.set_value_double((t - t0)*ref_period)
vcd_manager.set_time(i)
timestamp.set_value("{:064b}".format(t))
t0 = t
else:
vcd_manager.set_time(t)
channel_handlers[message.channel].process_message(message) channel_handlers[message.channel].process_message(message)
if isinstance(message, OutputMessage): if isinstance(message, OutputMessage):
slack.set_value_double( slack.set_value_double(

15
artiq/frontend/artiq_coreanalyzer.py
View File

@ -16,16 +16,22 @@ def get_argparser():
verbosity_args(parser) verbosity_args(parser)
parser.add_argument("--device-db", default="device_db.py", parser.add_argument("--device-db", default="device_db.py",
help="device database file (default: '%(default)s')") help="device database file (default: '%(default)s')")
parser.add_argument("-r", "--read-dump", type=str, default=None, parser.add_argument("-r", "--read-dump", type=str, default=None,
help="read raw dump file instead of accessing device") help="read raw dump file instead of accessing device")
parser.add_argument("-p", "--print-decoded", default=False, action="store_true", parser.add_argument("-p", "--print-decoded", default=False,
help="print raw decoded messages") action="store_true", help="print raw decoded messages")
parser.add_argument("-w", "--write-vcd", type=str, default=None, parser.add_argument("-w", "--write-vcd", type=str, default=None,
help="format and write contents to VCD file") help="format and write contents to VCD file")
parser.add_argument("-d", "--write-dump", type=str, default=None, parser.add_argument("-d", "--write-dump", type=str, default=None,
help="write raw dump file") help="write raw dump file")
parser.add_argument("-u", "--vcd-uniform-interval", action="store_true",
help="emit uniform time intervals between timed VCD "
"events and show RTIO event interval (in SI "
"seconds) and timestamp (in machine units) as "
"separate VCD channels")
return parser return parser
@ -54,7 +60,8 @@ def main():
if args.write_vcd: if args.write_vcd:
with open(args.write_vcd, "w") as f: with open(args.write_vcd, "w") as f:
decoded_dump_to_vcd(f, device_mgr.get_device_db(), decoded_dump_to_vcd(f, device_mgr.get_device_db(),
decoded_dump) decoded_dump,
uniform_interval=args.vcd_uniform_interval)
if args.write_dump: if args.write_dump:
with open(args.write_dump, "wb") as f: with open(args.write_dump, "wb") as f:
f.write(dump) f.write(dump)