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Arm backend: Add Ethos-U65 support to the arm_aot_compiler.py #18939

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Merged
zingo merged 1 commit into from
Apr 16, 2026
+5 −3
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Arm backend: Add Ethos-U65 support to the arm_aot_compiler.py #18939

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2 changes: 1 addition & 1 deletion backends/arm/ethosu/compile_spec.py
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Original file line number Diff line number Diff line change
Expand Up @@ -48,7 +48,7 @@ def _default_system_config_and_memory_mode(
return resolved_system_config, resolved_memory_mode
if "ethos-u65" in target_lower:
resolved_system_config = (
"Ethos_U65_SYS_DRAM_Mid" if system_config is None else system_config
"Ethos_U65_High_End" if system_config is None else system_config
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)
resolved_memory_mode = "Sram_Only" if memory_mode is None else memory_mode
Comment on lines 49 to 53
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Copilot AI Apr 16, 2026

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This PR changes the default system_config chosen for U65 targets; please add/adjust unit tests to lock in the expected default selection (e.g., asserting the generated compiler flags include the expected --system-config and --memory-mode when system_config/memory_mode are omitted).

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return resolved_system_config, resolved_memory_mode
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6 changes: 4 additions & 2 deletions backends/arm/scripts/aot_arm_compiler.py
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Expand Up @@ -452,6 +452,8 @@ def forward(self, x):
"ethos-u55-64",
"ethos-u55-128",
"ethos-u55-256",
"ethos-u65-256",
"ethos-u65-512",
"ethos-u85-128",
"ethos-u85-256",
"ethos-u85-512",
Expand Down Expand Up @@ -628,13 +630,13 @@ def _get_args():
"--system_config",
required=False,
default=None,
help="System configuration to select from the Vela configuration file (see vela.ini). This option must match the selected target, default is for an optimal system 'Ethos_U55_High_End_Embedded'/'Ethos_U85_SYS_DRAM_High'",
help="System configuration to select from the Vela configuration file (see vela.ini). This option must match the selected target, default is for an optimal system 'Ethos_U55_High_End_Embedded'/ 'Ethos_U65_High_End' / 'Ethos_U85_SYS_DRAM_Mid'",
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Copilot AI Apr 16, 2026

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The --system_config help text uses inconsistent separators/spacing ("...Embedded'/ 'Ethos_U65_High_End' / 'Ethos_U85...") which makes it harder to read. Consider rewriting it as separate per-target defaults (U55/U65/U85) or using consistent punctuation.

Suggested change
help="System configuration to select from the Vela configuration file (see vela.ini). This option must match the selected target, default is for an optimal system 'Ethos_U55_High_End_Embedded'/ 'Ethos_U65_High_End' / 'Ethos_U85_SYS_DRAM_Mid'",
help="System configuration to select from the Vela configuration file (see vela.ini). This option must match the selected target. Defaults for optimal systems are: Ethos-U55: 'Ethos_U55_High_End_Embedded'; Ethos-U65: 'Ethos_U65_High_End'; Ethos-U85: 'Ethos_U85_SYS_DRAM_Mid'.",

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)
parser.add_argument(
"--memory_mode",
required=False,
default=None,
help="Memory mode to select from the Vela configuration file (see vela.ini). Default is 'Shared_Sram' for Ethos-U55 targets and 'Sram_Only' for Ethos-U85 targets",
help="Memory mode to select from the Vela configuration file (see vela.ini). Default is 'Shared_Sram' for Ethos-U55 targets and 'Sram_Only' for Ethos-U65 and Ethos-U85 targets",
)
parser.add_argument(
"--config",
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