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Use extension/llm directly from LLaMARunner. #12050

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Merged
merged 1 commit into from
Jun 27, 2025
Merged

Use extension/llm directly from LLaMARunner. #12050

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47 changes: 26 additions & 21 deletions examples/demo-apps/apple_ios/LLaMA/LLaMARunner/LLaMARunner/Exported/LLaMARunner.mm
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Original file line number Diff line number Diff line change
Expand Up @@ -9,28 +9,33 @@
#import "LLaMARunner.h"

#import <ExecuTorch/ExecuTorchLog.h>
#import <executorch/examples/models/llama/runner/runner.h>
#import <executorch/extension/llm/runner/text_llm_runner.h>
#import <executorch/examples/models/llama/tokenizer/llama_tiktoken.h>

using executorch::extension::llm::GenerationConfig;
using executorch::extension::llm::TextLLMRunner;
using executorch::runtime::Error;
using namespace executorch::extension;
using namespace executorch::runtime;

NSErrorDomain const LLaMARunnerErrorDomain = @"LLaMARunnerErrorDomain";

@interface LLaMARunner ()<ExecuTorchLogSink>
@end

@implementation LLaMARunner {
std::unique_ptr<TextLLMRunner> _runner;
std::unique_ptr<llm::TextLLMRunner> _runner;
}

- (instancetype)initWithModelPath:(NSString*)modelPath
tokenizerPath:(NSString*)tokenizerPath {
self = [super init];
if (self) {
[ExecuTorchLog.sharedLog addSink:self];
_runner = example::create_llama_runner(
modelPath.UTF8String, tokenizerPath.UTF8String);
_runner = llm::create_text_llm_runner(
modelPath.UTF8String,
llm::load_tokenizer(
tokenizerPath.UTF8String,
example::get_special_tokens(example::Version::Default)
)
);
}
return self;
}
Expand Down Expand Up @@ -60,20 +65,19 @@ - (BOOL)generate:(NSString*)prompt
sequenceLength:(NSInteger)seq_len
withTokenCallback:(nullable void (^)(NSString*))callback
error:(NSError**)error {
const GenerationConfig config{
.seq_len = static_cast<int32_t>(seq_len)
};
const auto status = _runner->generate(
prompt.UTF8String, config, [callback](const std::string& token) {
prompt.UTF8String,
llm::GenerationConfig{.seq_len = static_cast<int32_t>(seq_len)},
[callback](const std::string& token) {
callback(@(token.c_str()));
});
if (status != Error::Ok) {
if (error) {
*error = [NSError errorWithDomain:LLaMARunnerErrorDomain
code:(NSInteger)status
userInfo:nil];
return NO;
}
return NO;
}
return YES;
}
Expand All @@ -95,15 +99,16 @@ - (void)logWithLevel:(ExecuTorchLogLevel)level
NSUInteger seconds = totalSeconds % 60;
NSUInteger microseconds = (timestamp - totalSeconds) * 1000000;
NSLog(
@"%c %02lu:%02lu:%02lu.%06lu executorch:%s:%zu] %s",
(char)level,
hours,
minutes,
seconds,
microseconds,
filename.UTF8String,
line,
message.UTF8String);
@"%c %02lu:%02lu:%02lu.%06lu executorch:%s:%zu] %s",
(char)level,
hours,
minutes,
seconds,
microseconds,
filename.UTF8String,
line,
message.UTF8String
);
}

@end
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