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Arm backend: Remove Linux PMU compile-spec configuration #24836

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Merged
Erik-Lundell merged 1 commit into from
Nov 10, 2026
Merged

Arm backend: Remove Linux PMU compile-spec configuration #24836

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31 changes: 3 additions & 28 deletions backends/arm/runtime/EthosUBackend_LinuxDriver.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -45,8 +45,6 @@ constexpr int64_t kDefaultEthosUTimeoutNs = 60000000000LL;
struct LinuxDriverOptions {
std::string device_path = "/dev/ethosu0";
int64_t timeout_ns = kDefaultEthosUTimeoutNs;
bool enable_cycle_counter = true;
std::array<uint32_t, ETHOSU_PMU_EVENT_MAX> pmu_events{};
};

struct PlatformState {
Expand Down Expand Up @@ -87,8 +85,6 @@ LinuxDriverOptions parse_linux_options(ArrayRef<CompileSpec> specs) {
LinuxDriverOptions options;
constexpr char kDeviceKey[] = "ethosu.device";
constexpr char kTimeoutKey[] = "ethosu.timeout_ns";
constexpr char kCycleCounterKey[] = "ethosu.enable_cycle_counter";
constexpr char kPmuPrefix[] = "ethosu.pmu_event";

for (const CompileSpec& spec : specs) {
if (spec.key == nullptr) {
Expand All @@ -110,27 +106,6 @@ LinuxDriverOptions parse_linux_options(ArrayRef<CompileSpec> specs) {
}
continue;
}

if (strcmp(spec.key, kCycleCounterKey) == 0) {
uint8_t enabled = 0;
if (read_scalar_value(spec, &enabled)) {
options.enable_cycle_counter = enabled != 0;
}
continue;
}

if (strncmp(spec.key, kPmuPrefix, strlen(kPmuPrefix)) == 0) {
const char* index_str = spec.key + strlen(kPmuPrefix);
char* endptr = nullptr;
long idx = std::strtol(index_str, &endptr, 10);
if (endptr != index_str && idx >= 0 &&
idx < static_cast<long>(ETHOSU_PMU_EVENT_MAX)) {
uint32_t event = 0;
if (read_scalar_value(spec, &event)) {
options.pmu_events[static_cast<size_t>(idx)] = event;
}
}
}
}

return options;
Expand Down Expand Up @@ -259,8 +234,8 @@ Error invoke_linux_driver(
state.ofm_buffers.end(),
state.intermediate_buffer,
state.constant_buffer,
options.pmu_events,
options.enable_cycle_counter);
std::array<uint32_t, ETHOSU_PMU_EVENT_MAX>{},
true);

if (inference->wait(options.timeout_ns)) {
ET_LOG(
Expand All @@ -279,7 +254,7 @@ Error invoke_linux_driver(
return Error::InvalidState;
}

if (options.enable_cycle_counter) {
{
try {
ET_LOG(
Info,
Expand Down
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