Module: LLaMACpp

Defined in:
lib/llama_cpp.rb,
lib/llama_cpp/version.rb,
ext/llama_cpp/llama_cpp.cpp

Overview

llama_cpp.rb provides Ruby bindings for the llama.cpp.

Constant Summary collapse

VERSION =

The version of llama_cpp.rb you install.

'0.17.2'
LLAMA_CPP_VERSION =

The supported version of llama.cpp.

'b3358'
LLAMA_VOCAB_TYPE_NONE = 
INT2NUM(LLAMA_VOCAB_TYPE_NONE)
LLAMA_VOCAB_TYPE_SPM = 
INT2NUM(LLAMA_VOCAB_TYPE_SPM)
LLAMA_VOCAB_TYPE_BPE = 
INT2NUM(LLAMA_VOCAB_TYPE_BPE)
LLAMA_VOCAB_TYPE_WPM = 
INT2NUM(LLAMA_VOCAB_TYPE_WPM)
LLAMA_VOCAB_TYPE_UGM = 
INT2NUM(LLAMA_VOCAB_TYPE_UGM)
LLAMA_VOCAB_PRE_TYPE_DEFAULT = 
INT2NUM(LLAMA_VOCAB_PRE_TYPE_DEFAULT)
LLAMA_VOCAB_PRE_TYPE_LLAMA3 = 
INT2NUM(LLAMA_VOCAB_PRE_TYPE_LLAMA3)
LLAMA_VOCAB_PRE_TYPE_DEEPSEEK_LLM = 
INT2NUM(LLAMA_VOCAB_PRE_TYPE_DEEPSEEK_LLM)
LLAMA_VOCAB_PRE_TYPE_DEEPSEEK_CODER = 
INT2NUM(LLAMA_VOCAB_PRE_TYPE_DEEPSEEK_CODER)
LLAMA_VOCAB_PRE_TYPE_FALCON = 
INT2NUM(LLAMA_VOCAB_PRE_TYPE_FALCON)
LLAMA_VOCAB_PRE_TYPE_MPT = 
INT2NUM(LLAMA_VOCAB_PRE_TYPE_MPT)
LLAMA_VOCAB_PRE_TYPE_STARCODER = 
INT2NUM(LLAMA_VOCAB_PRE_TYPE_STARCODER)
LLAMA_VOCAB_PRE_TYPE_GPT2 = 
INT2NUM(LLAMA_VOCAB_PRE_TYPE_GPT2)
LLAMA_VOCAB_PRE_TYPE_REFACT = 
INT2NUM(LLAMA_VOCAB_PRE_TYPE_REFACT)
LLAMA_VOCAB_PRE_TYPE_COMMAND_R = 
INT2NUM(LLAMA_VOCAB_PRE_TYPE_COMMAND_R)
LLAMA_VOCAB_PRE_TYPE_STABLELM2 = 
INT2NUM(LLAMA_VOCAB_PRE_TYPE_STABLELM2)
LLAMA_VOCAB_PRE_TYPE_QWEN2 = 
INT2NUM(LLAMA_VOCAB_PRE_TYPE_QWEN2)
LLAMA_VOCAB_PRE_TYPE_OLMO = 
INT2NUM(LLAMA_VOCAB_PRE_TYPE_OLMO)
LLAMA_VOCAB_PRE_TYPE_DBRX = 
INT2NUM(LLAMA_VOCAB_PRE_TYPE_DBRX)
LLAMA_VOCAB_PRE_TYPE_SMAUG = 
INT2NUM(LLAMA_VOCAB_PRE_TYPE_SMAUG)
LLAMA_VOCAB_PRE_TYPE_PORO = 
INT2NUM(LLAMA_VOCAB_PRE_TYPE_PORO)
LLAMA_VOCAB_PRE_TYPE_CHATGLM3 = 
INT2NUM(LLAMA_VOCAB_PRE_TYPE_CHATGLM3)
LLAMA_VOCAB_PRE_TYPE_CHATGLM4 = 
INT2NUM(LLAMA_VOCAB_PRE_TYPE_CHATGLM4)
LLAMA_VOCAB_PRE_TYPE_VIKING = 
INT2NUM(LLAMA_VOCAB_PRE_TYPE_VIKING)
LLAMA_VOCAB_PRE_TYPE_JAIS = 
INT2NUM(LLAMA_VOCAB_PRE_TYPE_JAIS)
LLAMA_TOKEN_TYPE_UNDEFINED = 
INT2NUM(LLAMA_TOKEN_TYPE_UNDEFINED)
LLAMA_TOKEN_TYPE_NORMAL = 
INT2NUM(LLAMA_TOKEN_TYPE_NORMAL)
LLAMA_TOKEN_TYPE_UNKNOWN = 
INT2NUM(LLAMA_TOKEN_TYPE_UNKNOWN)
LLAMA_TOKEN_TYPE_CONTROL = 
INT2NUM(LLAMA_TOKEN_TYPE_CONTROL)
LLAMA_TOKEN_TYPE_USER_DEFINED = 
INT2NUM(LLAMA_TOKEN_TYPE_USER_DEFINED)
LLAMA_TOKEN_TYPE_UNUSED = 
INT2NUM(LLAMA_TOKEN_TYPE_UNUSED)
LLAMA_TOKEN_TYPE_BYTE = 
INT2NUM(LLAMA_TOKEN_TYPE_BYTE)
LLAMA_TOKEN_ATTR_UNDEFINED = 
INT2NUM(LLAMA_TOKEN_ATTR_UNDEFINED)
LLAMA_TOKEN_ATTR_UNKNOWN = 
INT2NUM(LLAMA_TOKEN_ATTR_UNKNOWN)
LLAMA_TOKEN_ATTR_UNUSED = 
INT2NUM(LLAMA_TOKEN_ATTR_UNUSED)
LLAMA_TOKEN_ATTR_NORMAL = 
INT2NUM(LLAMA_TOKEN_ATTR_NORMAL)
LLAMA_TOKEN_ATTR_CONTROL = 
INT2NUM(LLAMA_TOKEN_ATTR_CONTROL)
LLAMA_TOKEN_ATTR_USER_DEFINED = 
INT2NUM(LLAMA_TOKEN_ATTR_USER_DEFINED)
LLAMA_TOKEN_ATTR_BYTE = 
INT2NUM(LLAMA_TOKEN_ATTR_BYTE)
LLAMA_TOKEN_ATTR_NORMALIZED = 
INT2NUM(LLAMA_TOKEN_ATTR_NORMALIZED)
LLAMA_TOKEN_ATTR_LSTRIP = 
INT2NUM(LLAMA_TOKEN_ATTR_LSTRIP)
LLAMA_TOKEN_ATTR_RSTRIP = 
INT2NUM(LLAMA_TOKEN_ATTR_RSTRIP)
LLAMA_TOKEN_ATTR_SINGLE_WORD = 
INT2NUM(LLAMA_TOKEN_ATTR_SINGLE_WORD)
LLAMA_FTYPE_ALL_F32 = 
INT2NUM(LLAMA_FTYPE_ALL_F32)
LLAMA_FTYPE_MOSTLY_F16 = 
INT2NUM(LLAMA_FTYPE_MOSTLY_F16)
LLAMA_FTYPE_MOSTLY_Q4_0 = 
INT2NUM(LLAMA_FTYPE_MOSTLY_Q4_0)
LLAMA_FTYPE_MOSTLY_Q4_1 = 
INT2NUM(LLAMA_FTYPE_MOSTLY_Q4_1)
LLAMA_FTYPE_MOSTLY_Q4_1_SOME_F16 = 
INT2NUM(LLAMA_FTYPE_MOSTLY_Q4_1_SOME_F16)
LLAMA_FTYPE_MOSTLY_Q8_0 = 
INT2NUM(LLAMA_FTYPE_MOSTLY_Q8_0)
LLAMA_FTYPE_MOSTLY_Q5_0 = 
INT2NUM(LLAMA_FTYPE_MOSTLY_Q5_0)
LLAMA_FTYPE_MOSTLY_Q5_1 = 
INT2NUM(LLAMA_FTYPE_MOSTLY_Q5_1)
LLAMA_FTYPE_MOSTLY_Q2_K = 
INT2NUM(LLAMA_FTYPE_MOSTLY_Q2_K)
LLAMA_FTYPE_MOSTLY_Q3_K_S = 
INT2NUM(LLAMA_FTYPE_MOSTLY_Q3_K_S)
LLAMA_FTYPE_MOSTLY_Q3_K_M = 
INT2NUM(LLAMA_FTYPE_MOSTLY_Q3_K_M)
LLAMA_FTYPE_MOSTLY_Q3_K_L = 
INT2NUM(LLAMA_FTYPE_MOSTLY_Q3_K_L)
LLAMA_FTYPE_MOSTLY_Q4_K_S = 
INT2NUM(LLAMA_FTYPE_MOSTLY_Q4_K_S)
LLAMA_FTYPE_MOSTLY_Q4_K_M = 
INT2NUM(LLAMA_FTYPE_MOSTLY_Q4_K_M)
LLAMA_FTYPE_MOSTLY_Q5_K_S = 
INT2NUM(LLAMA_FTYPE_MOSTLY_Q5_K_S)
LLAMA_FTYPE_MOSTLY_Q5_K_M = 
INT2NUM(LLAMA_FTYPE_MOSTLY_Q5_K_M)
LLAMA_FTYPE_MOSTLY_Q6_K = 
INT2NUM(LLAMA_FTYPE_MOSTLY_Q6_K)
LLAMA_FTYPE_MOSTLY_IQ2_XXS = 
INT2NUM(LLAMA_FTYPE_MOSTLY_IQ2_XXS)
LLAMA_FTYPE_MOSTLY_IQ2_XS = 
INT2NUM(LLAMA_FTYPE_MOSTLY_IQ2_XS)
LLAMA_FTYPE_MOSTLY_Q2_K_S = 
INT2NUM(LLAMA_FTYPE_MOSTLY_Q2_K_S)
LLAMA_FTYPE_MOSTLY_IQ3_XS = 
INT2NUM(LLAMA_FTYPE_MOSTLY_IQ3_XS)
LLAMA_FTYPE_MOSTLY_IQ3_XXS = 
INT2NUM(LLAMA_FTYPE_MOSTLY_IQ3_XXS)
LLAMA_FTYPE_MOSTLY_IQ1_S = 
INT2NUM(LLAMA_FTYPE_MOSTLY_IQ1_S)
LLAMA_FTYPE_MOSTLY_IQ4_NL = 
INT2NUM(LLAMA_FTYPE_MOSTLY_IQ4_NL)
LLAMA_FTYPE_MOSTLY_IQ3_S = 
INT2NUM(LLAMA_FTYPE_MOSTLY_IQ3_S)
LLAMA_FTYPE_MOSTLY_IQ3_M = 
INT2NUM(LLAMA_FTYPE_MOSTLY_IQ3_M)
LLAMA_FTYPE_MOSTLY_IQ4_XS = 
INT2NUM(LLAMA_FTYPE_MOSTLY_IQ4_XS)
LLAMA_FTYPE_MOSTLY_IQ1_M = 
INT2NUM(LLAMA_FTYPE_MOSTLY_IQ1_M)
LLAMA_FTYPE_MOSTLY_BF16 = 
INT2NUM(LLAMA_FTYPE_MOSTLY_BF16)
LLAMA_FTYPE_GUESSED = 
INT2NUM(LLAMA_FTYPE_GUESSED)
LLAMA_KV_OVERRIDE_TYPE_INT = 
INT2NUM(LLAMA_KV_OVERRIDE_TYPE_INT)
LLAMA_KV_OVERRIDE_TYPE_FLOAT = 
INT2NUM(LLAMA_KV_OVERRIDE_TYPE_FLOAT)
LLAMA_KV_OVERRIDE_TYPE_BOOL = 
INT2NUM(LLAMA_KV_OVERRIDE_TYPE_BOOL)
LLAMA_KV_OVERRIDE_TYPE_STR = 
INT2NUM(LLAMA_KV_OVERRIDE_TYPE_STR)
LLAMA_GRETYPE_END = 
INT2NUM(LLAMA_GRETYPE_END)
LLAMA_GRETYPE_ALT = 
INT2NUM(LLAMA_GRETYPE_ALT)
LLAMA_GRETYPE_RULE_REF = 
INT2NUM(LLAMA_GRETYPE_RULE_REF)
LLAMA_GRETYPE_CHAR = 
INT2NUM(LLAMA_GRETYPE_CHAR)
LLAMA_GRETYPE_CHAR_NOT = 
INT2NUM(LLAMA_GRETYPE_CHAR_NOT)
LLAMA_GRETYPE_CHAR_RNG_UPPER = 
INT2NUM(LLAMA_GRETYPE_CHAR_RNG_UPPER)
LLAMA_GRETYPE_CHAR_ALT = 
INT2NUM(LLAMA_GRETYPE_CHAR_ALT)
LLAMA_GRETYPE_CHAR_ANY = 
INT2NUM(LLAMA_GRETYPE_CHAR_ANY)
LLAMA_ROPE_SCALING_TYPE_UNSPECIFIED = 
INT2NUM(LLAMA_ROPE_SCALING_TYPE_UNSPECIFIED)
LLAMA_ROPE_SCALING_TYPE_NONE = 
INT2NUM(LLAMA_ROPE_SCALING_TYPE_NONE)
LLAMA_ROPE_SCALING_TYPE_LINEAR = 
INT2NUM(LLAMA_ROPE_SCALING_TYPE_LINEAR)
LLAMA_ROPE_SCALING_TYPE_YARN = 
INT2NUM(LLAMA_ROPE_SCALING_TYPE_YARN)
LLAMA_ROPE_SCALING_TYPE_MAX_VALUE = 
INT2NUM(LLAMA_ROPE_SCALING_TYPE_MAX_VALUE)
LLAMA_POOLING_TYPE_UNSPECIFIED = 
INT2NUM(LLAMA_POOLING_TYPE_UNSPECIFIED)
LLAMA_POOLING_TYPE_NONE = 
INT2NUM(LLAMA_POOLING_TYPE_NONE)
LLAMA_POOLING_TYPE_MEAN = 
INT2NUM(LLAMA_POOLING_TYPE_MEAN)
LLAMA_POOLING_TYPE_CLS = 
INT2NUM(LLAMA_POOLING_TYPE_CLS)
LLAMA_POOLING_TYPE_LAST = 
INT2NUM(LLAMA_POOLING_TYPE_LAST)
LLAMA_ATTENTION_TYPE_UNSPECIFIED = 
INT2NUM(LLAMA_ATTENTION_TYPE_UNSPECIFIED)
LLAMA_ATTENTION_TYPE_CAUSAL = 
INT2NUM(LLAMA_ATTENTION_TYPE_CAUSAL)
LLAMA_ATTENTION_TYPE_NON_CAUSAL = 
INT2NUM(LLAMA_ATTENTION_TYPE_NON_CAUSAL)
LLAMA_SPLIT_MODE_NONE = 
INT2NUM(LLAMA_SPLIT_MODE_NONE)
LLAMA_SPLIT_MODE_LAYER = 
INT2NUM(LLAMA_SPLIT_MODE_LAYER)
LLAMA_SPLIT_MODE_ROW = 
INT2NUM(LLAMA_SPLIT_MODE_ROW)
LLAMA_FILE_MAGIC_GGLA = 
rb_str_new2(ss_magic.str().c_str())
LLAMA_FILE_MAGIC_GGSN = 
rb_str_new2(ss_magic.str().c_str())
LLAMA_FILE_MAGIC_GGSQ = 
rb_str_new2(ss_magic.str().c_str())
LLAMA_SESSION_MAGIC = 
rb_str_new2(ss_magic.str().c_str())
LLAMA_STATE_SEQ_MAGIC = 
rb_str_new2(ss_magic.str().c_str())
LLAMA_DEFAULT_SEED = 
rb_str_new2(ss_magic.str().c_str())
LLAMA_SESSION_VERSION = 
rb_str_new2(std::to_string(LLAMA_SESSION_VERSION).c_str())
LLAMA_STATE_SEQ_VERSION = 
rb_str_new2(std::to_string(LLAMA_STATE_SEQ_VERSION).c_str())

Class Method Summary collapse

Class Method Details

.backend_free ⇒ Object 



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# File 'ext/llama_cpp/llama_cpp.cpp', line 3496

static VALUE rb_llama_llama_backend_free(VALUE self) {
  llama_backend_free();

  return Qnil;
}

.backend_init ⇒ Object

module functions



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# File 'ext/llama_cpp/llama_cpp.cpp', line 3490

static VALUE rb_llama_llama_backend_init(VALUE self) {
  llama_backend_init();

  return Qnil;
}

.generate(context, prompt, n_predict: 128, n_keep: 10, n_batch: 512, repeat_last_n: 64, repeat_penalty: 1.1, frequency: 0.0, presence: 0.0, top_k: 40, top_p: 0.95, tfs_z: 1.0, typical_p: 1.0, temperature: 0.8) ⇒ String

Generates sentences following the given prompt for operation check.

Parameters:

  • context (LLaMACpp::Context) —

    The context to use.

  • prompt (String) —

    The prompt to start generation with.

  • n_predict (Integer) (defaults to: 128) —

    The number of tokens to predict.

  • n_keep (Integer) (defaults to: 10) —

    The number of tokens to keep in the context.

  • n_batch (Integer) (defaults to: 512) —

    The number of tokens to process in a batch.

  • repeat_last_n (Integer) (defaults to: 64) —

    The number of tokens to consider for repetition penalty.

  • repeat_penalty (Float) (defaults to: 1.1) —

    The repetition penalty.

  • frequency (Float) (defaults to: 0.0) —

    The frequency penalty.

  • presence (Float) (defaults to: 0.0) —

    The presence penalty.

  • top_k (Integer) (defaults to: 40) —

    The number of tokens to consider for top-k sampling.

  • top_p (Float) (defaults to: 0.95) —

    The probability threshold for nucleus sampling.

  • tfs_z (Float) (defaults to: 1.0) —

    The z parameter for tail-free sampling.

  • typical_p (Float) (defaults to: 1.0) —

    The probability for typical sampling.

  • temperature (Float) (defaults to: 0.8) —

    The temperature for temperature sampling.

Returns:

  • (String)

Raises:

  • (ArgumentError) 


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# File 'lib/llama_cpp.rb', line 27

def generate(context, prompt, # rubocop:disable Metrics/AbcSize, Metrics/CyclomaticComplexity, Metrics/MethodLength, Metrics/ParameterLists, Metrics/PerceivedComplexity
             n_predict: 128, n_keep: 10, n_batch: 512, repeat_last_n: 64,
             repeat_penalty: 1.1, frequency: 0.0, presence: 0.0, top_k: 40,
             top_p: 0.95, tfs_z: 1.0, typical_p: 1.0, temperature: 0.8)
  raise ArgumentError, 'context must be an instance of LLaMACpp::Context' unless context.is_a?(LLaMACpp::Context)
  raise ArgumentError, 'prompt must be a String' unless prompt.is_a?(String)

  spaced_prompt = " #{prompt}"
  embd_input = context.model.tokenize(text: spaced_prompt, add_bos: true)

  n_ctx = context.n_ctx
  raise ArgumentError, "prompt is too long #{embd_input.size} tokens, maximum is #{n_ctx - 4}" if embd_input.size > n_ctx - 4

  last_n_tokens = [0] * n_ctx

  embd = []
  n_consumed = 0
  n_past = 0
  n_remain = n_predict
  n_vocab = context.model.n_vocab
  output = []

  while n_remain != 0
    unless embd.empty?
      if n_past + embd.size > n_ctx
        n_left = n_past - n_keep
        n_past = n_keep
        embd.insert(0, last_n_tokens[(n_ctx - (n_left / 2) - embd.size)...-embd.size])
      end

      context.decode(LLaMACpp::Batch.get_one(tokens: embd, n_tokens: embd.size, pos_zero: n_past, seq_id: 0))
    end

    n_past += embd.size
    embd.clear

    if embd_input.size <= n_consumed
      logits = context.logits
      base_candidates = Array.new(n_vocab) { |i| LLaMACpp::TokenData.new(id: i, logit: logits[i], p: 0.0) }
      candidates = LLaMACpp::TokenDataArray.new(base_candidates)

      # apply penalties
      last_n_repeat = [last_n_tokens.size, repeat_last_n, n_ctx].min
      context.sample_repetition_penalties(
        candidates, last_n_tokens[-last_n_repeat..],
        penalty_repeat: repeat_penalty, penalty_freq: frequency, penalty_present: presence
      )

      # temperature sampling
      context.sample_top_k(candidates, k: top_k)
      context.sample_tail_free(candidates, z: tfs_z)
      context.sample_typical(candidates, prob: typical_p)
      context.sample_top_p(candidates, prob: top_p)
      context.sample_temp(candidates, temp: temperature)
      id = context.sample_token(candidates)

      last_n_tokens.shift
      last_n_tokens.push(id)

      embd.push(id)
      n_remain -= 1
    else
      while embd_input.size > n_consumed
        embd.push(embd_input[n_consumed])
        last_n_tokens.shift
        last_n_tokens.push(embd_input[n_consumed])
        n_consumed += 1
        break if embd.size >= n_batch
      end
    end

    embd.each { |token| output << context.model.token_to_piece(token) }

    break if !embd.empty? && embd[-1] == context.model.token_eos
  end

  output.join.scrub('?').strip.delete_prefix(prompt).strip
end

.max_devices ⇒ Object 



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# File 'ext/llama_cpp/llama_cpp.cpp', line 3554

static VALUE rb_llama_max_devices(VALUE self) {
  return SIZET2NUM(llama_max_devices());
}

.model_quantize(*args) ⇒ Object 



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# File 'ext/llama_cpp/llama_cpp.cpp', line 3513

static VALUE rb_llama_model_quantize(int argc, VALUE* argv, VALUE self) {
  VALUE kw_args = Qnil;
  ID kw_table[3] = { rb_intern("input_path"), rb_intern("output_path"), rb_intern("params") };
  VALUE kw_values[3] = { Qundef, Qundef, Qundef };
  rb_scan_args(argc, argv, ":", &kw_args);
  rb_get_kwargs(kw_args, kw_table, 3, 0, kw_values);

  if (!RB_TYPE_P(kw_values[0], T_STRING)) {
    rb_raise(rb_eArgError, "input_path must be a string");
    return Qnil;
  }
  if (!RB_TYPE_P(kw_values[1], T_STRING)) {
    rb_raise(rb_eArgError, "output_path must be a string");
    return Qnil;
  }
  if (!rb_obj_is_kind_of(kw_values[2], rb_cLLaMAModelQuantizeParams)) {
    rb_raise(rb_eArgError, "params must be a ModelQuantizeParams");
    return Qnil;
  }

  const char* input_path = StringValueCStr(kw_values[0]);
  const char* output_path = StringValueCStr(kw_values[1]);
  LLaMAModelQuantizeParamsWrapper* wrapper = RbLLaMAModelQuantizeParams::get_llama_model_quantize_params(kw_values[2]);

  if (llama_model_quantize(input_path, output_path, &(wrapper->params)) != 0) {
    rb_raise(rb_eRuntimeError, "Failed to quantize model");
    return Qnil;
  }

  return Qnil;
}

.numa_init(strategy) ⇒ Object 



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# File 'ext/llama_cpp/llama_cpp.cpp', line 3502

static VALUE rb_llama_llama_numa_init(VALUE self, VALUE strategy) {
  if (!RB_INTEGER_TYPE_P(strategy)) {
    rb_raise(rb_eArgError, "strategy must be an integer");
    return Qnil;
  }

  llama_numa_init(static_cast<enum ggml_numa_strategy>(NUM2INT(strategy)));

  return Qnil;
}

.print_system_info ⇒ Object 



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# File 'ext/llama_cpp/llama_cpp.cpp', line 3545

static VALUE rb_llama_print_system_info(VALUE self) {
  const char* result = llama_print_system_info();
  return rb_utf8_str_new_cstr(result);
}

.supports_gpu_offload? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'ext/llama_cpp/llama_cpp.cpp', line 3566

static VALUE rb_llama_supports_gpu_offload(VALUE self) {
  return llama_supports_gpu_offload() ? Qtrue : Qfalse;
}

.supports_mlock? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'ext/llama_cpp/llama_cpp.cpp', line 3562

static VALUE rb_llama_supports_mlock(VALUE self) {
  return llama_supports_mlock() ? Qtrue : Qfalse;
}

.supports_mmap? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'ext/llama_cpp/llama_cpp.cpp', line 3558

static VALUE rb_llama_supports_mmap(VALUE self) {
  return llama_supports_mmap() ? Qtrue : Qfalse;
}

.time_us ⇒ Object 



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# File 'ext/llama_cpp/llama_cpp.cpp', line 3550

static VALUE rb_llama_time_us(VALUE self) {
  return LONG2NUM(llama_time_us());
}