Get the tensors to be loaded properly.

candle-examples/examples/bert/main.rs

@@ -1,7 +1,8 @@
 #![allow(dead_code)]
 
-use anyhow::Result as R;
+use anyhow::Error as E;
 use candle::{safetensors::SafeTensors, DType, Device, Result, Shape, Tensor};
+use clap::Parser;
 use std::collections::HashMap;
 
 const DTYPE: DType = DType::F32;
@@ -125,6 +126,29 @@ impl Default for Config {
     }
 }
 
+impl Config {
+    fn all_mini_lm_l6_v2() -> Self {
+        // https://huggingface.co/sentence-transformers/all-MiniLM-L6-v2/blob/main/config.json
+        Self {
+            vocab_size: 30522,
+            hidden_size: 384,
+            num_hidden_layers: 6,
+            num_attention_heads: 12,
+            intermediate_size: 1536,
+            hidden_act: HiddenAct::Gelu,
+            hidden_dropout_prob: 0.1,
+            max_position_embeddings: 512,
+            type_vocab_size: 2,
+            initializer_range: 0.02,
+            layer_norm_eps: 1e-12,
+            pad_token_id: 0,
+            position_embedding_type: PositionEmbeddingType::Absolute,
+            use_cache: true,
+            classifier_dropout: None,
+        }
+    }
+}
+
 struct Embedding {
     embeddings: Tensor,
 }
@@ -155,8 +179,8 @@ impl Linear {
     }
 
     fn load(size1: usize, size2: usize, p: &str, vb: &VarBuilder) -> Result<Self> {
-        let weight = vb.get((size1, size2), &format!("{p}.weight"))?;
-        let bias = vb.get(size1, &format!("{p}.bias"))?;
+        let weight = vb.get((size2, size1), &format!("{p}.weight"))?;
+        let bias = vb.get(size2, &format!("{p}.bias"))?;
         Ok(Self::new(weight, bias))
     }
 
@@ -364,8 +388,8 @@ struct BertAttention {
 
 impl BertAttention {
     fn load(p: &str, vb: &VarBuilder, config: &Config) -> Result<Self> {
-        let self_attention = BertSelfAttention::load(&format!("{p}.self_attention"), vb, config)?;
-        let self_output = BertSelfOutput::load(&format!("{p}.self_output"), vb, config)?;
+        let self_attention = BertSelfAttention::load(&format!("{p}.self"), vb, config)?;
+        let self_output = BertSelfOutput::load(&format!("{p}.output"), vb, config)?;
         Ok(Self {
             self_attention,
             self_output,
@@ -477,7 +501,7 @@ impl BertEncoder {
     fn load(p: &str, vb: &VarBuilder, config: &Config) -> Result<Self> {
         let layers = (0..config.num_hidden_layers)
             .map(|index| {
-                let p = format!("{p}.{index}");
+                let p = format!("{p}.layer.{index}");
                 BertLayer::load(&p, vb, config)
             })
             .collect::<Result<Vec<_>>>()?;
@@ -517,10 +541,47 @@ impl BertModel {
     }
 }
 
-fn main() -> R<()> {
-    let device = Device::Cpu;
-    let vb = VarBuilder::zeros(DTYPE, device);
-    let config = Config::default();
-    let _model = BertModel::load(&vb, &config)?;
+#[derive(Parser, Debug)]
+#[command(author, version, about, long_about = None)]
+struct Args {
+    /// Run on CPU rather than on GPU.
+    #[arg(long)]
+    cpu: bool,
+
+    #[arg(long)]
+    tokenizer_config: String,
+
+    #[arg(long)]
+    weights: String,
+}
+
+fn main() -> anyhow::Result<()> {
+    use tokenizers::Tokenizer;
+
+    let args = Args::parse();
+    let device = if args.cpu {
+        Device::Cpu
+    } else {
+        Device::new_cuda(0)?
+    };
+
+    let tokenizer = Tokenizer::from_file(args.tokenizer_config).map_err(E::msg)?;
+
+    let weights = unsafe { candle::safetensors::MmapedFile::new(args.weights)? };
+    let weights = weights.deserialize()?;
+    let vb = VarBuilder::from_safetensors(vec![weights], DTYPE, device.clone());
+    let config = Config::all_mini_lm_l6_v2();
+    let model = BertModel::load(&vb, &config)?;
+
+    let tokens = tokenizer
+        .encode("This is an example sentence", true)
+        .map_err(E::msg)?
+        .get_ids()
+        .to_vec();
+    let token_ids = Tensor::new(&tokens[..], &device)?;
+    let position_ids: Vec<_> = (0..tokens.len() as u32).collect();
+    let position_ids = Tensor::new(&position_ids[..], &device)?.unsqueeze(0)?;
+    let ys = model.forward(&token_ids, &position_ids)?;
+    println!("{ys}");
     Ok(())
 }