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authorVratko Polak <vrpolak@cisco.com>2021-03-25 19:26:35 +0100
committerVratko Polak <vrpolak@cisco.com>2021-03-26 14:32:10 +0100
commit9f0ea4e6be697aa8ca08a6da596d7ca5892d2183 (patch)
tree79ede5e7c43a5d0106a84b81093650c7bce8117b /GPL/tools/trex/trex_astf_profile.py
parent6bba7b0bef31a8993848f0dcf5e661e8ccf02ddd (diff)
STL traffic: Use the sleep+stop logic
+ PPS limit for AWS set to 1.2 Mpps. + The logic is very similar to that one in ASTF driver. + This helps for testbeds with high duration stretching (e.g. AWS). + Difference: No transaction scale, and we deal with floats. + Update loss counting to count unsent packets as lost. + Also count "unsent" transactions for other transaction types. + If nonzero, log the number of unsent packets/transactions. + Make STL and ASTF time overhead constant (called delay) configurable. + Subtract delay from approximated_duration, also for ASTF. Change-Id: I6ee6aa6fba4f110ba1636e1b0ff76cac64383e33 Signed-off-by: Vratko Polak <vrpolak@cisco.com>
Diffstat (limited to 'GPL/tools/trex/trex_astf_profile.py')
-rw-r--r--GPL/tools/trex/trex_astf_profile.py30
1 files changed, 16 insertions, 14 deletions
diff --git a/GPL/tools/trex/trex_astf_profile.py b/GPL/tools/trex/trex_astf_profile.py
index 3f244ecf09..d08fb61778 100644
--- a/GPL/tools/trex/trex_astf_profile.py
+++ b/GPL/tools/trex/trex_astf_profile.py
@@ -79,6 +79,7 @@ def simple_burst(
latency,
async_start=False,
traffic_directions=2,
+ delay=0.0,
):
"""Send traffic and measure packet loss and latency.
@@ -98,8 +99,9 @@ def simple_burst(
Duration details:
Contrary to stateless mode, ASTF profiles typically limit the number
of flows/transactions that can happen.
- The caller is expected to set the duration parameter accordingly to
- this limit and multiplier, including any overheads.
+ The caller is expected to set the duration parameter to idealized value,
+ but set the delay arguments when TRex is expected
+ to finish processing replies later (including a window for latency).
See *_traffic_duration output fields for TRex's measurement
of the real traffic duration (should be without any inactivity overheads).
If traffic has not ended by the final time, the traffic
@@ -111,11 +113,7 @@ def simple_burst(
:param profile_file: A python module with T-rex traffic profile.
:param duration: Expected duration for all transactions to finish,
- assuming only tolerable duration stretching happens.
- This includes later start of later transactions
- (according to TPS multiplier) and expected duration of each transaction.
- Critically, this also includes any delay TRex shows when starting
- traffic (but not the similar delay during stopping).
+ without any TRex related delays, without even latency.
:param framesize: Frame size.
:param multiplier: Multiplier of profile CPS.
:param port_0: Port 0 on the traffic generator.
@@ -123,6 +121,7 @@ def simple_burst(
:param latency: With latency stats.
:param async_start: Start the traffic and exit.
:param traffic_directions: Bidirectional (2) or unidirectional (1) traffic.
+ :param delay: Time increase [s] for sleep duration.
:type profile_file: str
:type duration: float
:type framesize: int or str
@@ -132,6 +131,7 @@ def simple_burst(
:type latency: bool
:type async_start: bool
:type traffic_directions: int
+ :type delay: float
"""
client = None
total_received = 0
@@ -179,14 +179,12 @@ def simple_burst(
# Choose CPS and start traffic.
client.start(
mult=multiplier,
- # Increase the input duration slightly,
- # to ensure it does not end before sleep&stop below happens.
- duration=duration + 0.1 if duration > 0 else duration,
+ duration=duration,
nc=True,
latency_pps=int(multiplier) if latency else 0,
client_mask=2**len(ports)-1,
)
- time_start = time.monotonic()
+ time_stop = time.monotonic() + duration + delay
if async_start:
# For async stop, we need to export the current snapshot.
@@ -196,8 +194,7 @@ def simple_burst(
xsnap1 = client.ports[port_1].get_xstats().reference_stats
print(f"Xstats snapshot 1: {xsnap1!r}")
else:
- time.sleep(duration)
-
+ time.sleep(duration + delay)
# Do not block yet, the existing transactions may take long time
# to finish. We need an action that is almost reset(),
# but without clearing stats.
@@ -208,7 +205,7 @@ def simple_burst(
client.stop(block=True)
# Read the stats after the traffic stopped (or time up).
- stats[time.monotonic() - time_start] = client.get_stats(
+ stats[time.monotonic() - time_stop] = client.get_stats(
ports=ports
)
@@ -442,6 +439,10 @@ def main():
u"--traffic_directions", type=int, default=2,
help=u"Send bi- (2) or uni- (1) directional traffic."
)
+ parser.add_argument(
+ u"--delay", required=True, type=float, default=0.0,
+ help=u"Allowed time overhead, sleep time is increased by this [s]."
+ )
args = parser.parse_args()
@@ -460,6 +461,7 @@ def main():
latency=args.latency,
async_start=args.async_start,
traffic_directions=args.traffic_directions,
+ delay=args.delay,
)