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Increase cool_down_time_seconds, warm_up_time_seconds and ntttcp execution time If ncpu > 64. #4528

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Merged
LiliDeng merged 3 commits into from
Jun 25, 2026
+19 −1
Merged

Increase cool_down_time_seconds, warm_up_time_seconds and ntttcp execution time If ncpu > 64. #4528

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36f4d47
If ncpu > 64, increase cool_down_time_seconds and warm_up_time_second…
SRIKKANTH May 5, 2026
a150939
copilot comment fixes
SRIKKANTH Jun 14, 2026
eed085f
Update common.py
SRIKKANTH Jun 18, 2026
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13 changes: 13 additions & 0 deletions lisa/microsoft/testsuites/performance/common.py
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Original file line number Diff line number Diff line change
Expand Up @@ -473,6 +473,14 @@ def perf_ntttcp( # noqa: C901
)
dev_differentiator = "Hypervisor callback interrupts"
max_server_threads = 64
# On large VMs (>64 CPUs) the default 10s ntttcp run is too short for
# throughput to stabilize across all queues, leading to noisy results.
# Use a 120s run time on these SKUs and keep the default 10s elsewhere
# to avoid lengthening every test.
client_core_count = client.tools[Lscpu].get_core_count()
run_time_seconds = 120 if client_core_count > 64 else 10
warm_up_time_seconds = 5 if client_core_count > 64 else 1
cool_down_time_seconds = 5 if client_core_count > 64 else 1
Comment on lines +480 to +483
perf_ntttcp_message_list: List[

@LiliDeng LiliDeng Jun 16, 2026

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Please also change the for

lisa/lisa/microsoft/testsuites/performance/common.py

Line 567 in a150939

run_time_seconds=10,

@SRIKKANTH SRIKKANTH Jun 18, 2026

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Fixed

Union[NetworkTCPPerformanceMessage, NetworkUDPPerformanceMessage]
] = []
Expand Down Expand Up @@ -546,6 +554,8 @@ def perf_ntttcp( # noqa: C901
dev_differentiator=dev_differentiator,
udp_mode=udp_mode,
no_debug_log=True,
cool_down_time_seconds=cool_down_time_seconds,
warm_up_time_seconds=warm_up_time_seconds,
)
Comment on lines 545 to 560

@SRIKKANTH SRIKKANTH Jun 18, 2026

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Fixed


# Start lagscope client to measure latency during the
Expand All @@ -571,6 +581,9 @@ def perf_ntttcp( # noqa: C901
buffer_size=buffer_size,
threads_count=num_threads_n,
ports_count=num_threads_p,
run_time_seconds=run_time_seconds,
cool_down_time_seconds=cool_down_time_seconds,
warm_up_time_seconds=warm_up_time_seconds,
dev_differentiator=dev_differentiator,
udp_mode=udp_mode,
tolerance_seconds=client_ntttcp_timeout_tolerance_seconds,
Expand Down
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