llama: use sliding window for phi3 (ggml-org#8627)

* use sliding window for phi3

* fix typo, "data_swa" -> "data"

* [conver_hf_to_gguf.py] add phi3 sliding window

Author: FanShupei

convert_hf_to_gguf.py

@@ -2084,6 +2084,7 @@ def set_gguf_parameters(self):
         self.gguf_writer.add_rope_dimension_count(rope_dims)
         self.gguf_writer.add_rope_freq_base(self.find_hparam(["rope_theta"]))
         self.gguf_writer.add_file_type(self.ftype)
+        self.gguf_writer.add_sliding_window(self.find_hparam(["sliding_window"]))
 
         # write rope scaling for long context (128k) model
         rope_scaling = self.find_hparam(['rope_scaling'], True)

src/llama.cpp

@@ -4890,6 +4890,7 @@ static void llm_load_hparams(
             } break;
         case LLM_ARCH_PHI3:
             {
+                ml.get_key(LLM_KV_ATTENTION_SLIDING_WINDOW, hparams.n_swa);
                 ml.get_key(LLM_KV_ATTENTION_LAYERNORM_RMS_EPS, hparams.f_norm_rms_eps);
 
                 switch (hparams.n_layer) {
@@ -10749,7 +10750,7 @@ struct llm_build_context {
         struct ggml_tensor * inp_pos = build_inp_pos();
 
         // KQ_mask (mask for 1 head, it will be broadcasted to all heads)
-        struct ggml_tensor * KQ_mask = build_inp_KQ_mask();
+        struct ggml_tensor * KQ_mask_swa = build_inp_KQ_mask_swa();
 
         for (int il = 0; il < n_layer; ++il) {
             auto residual = inpL;
@@ -10807,7 +10808,7 @@ struct llm_build_context {
 
                 cur = llm_build_kv(ctx0, lctx, kv_self, gf,
                         model.layers[il].wo, model.layers[il].bo,
-                        Kcur, Vcur, Qcur, KQ_mask, n_tokens, kv_head, n_kv, 1.0f, cb, il);
+                        Kcur, Vcur, Qcur, KQ_mask_swa, n_tokens, kv_head, n_kv, 1.0f, cb, il);
             }
 
             if (il == n_layer - 1) {
@@ -14014,18 +14015,23 @@ static void llama_set_inputs(llama_context & lctx, const llama_batch & batch) {
         "causal attention is not supported by this model"
     );
 
-    if (lctx.inp_KQ_mask) {
+    if (lctx.inp_KQ_mask || lctx.inp_KQ_mask_swa) {
         // NOTE: hparams.causal_attn indicates the model is capable of generation and uses the kv cache.
         if (cparams.causal_attn && !lctx.is_encoding) {
             const int64_t n_kv     = kv_self.n;
             const int64_t n_tokens = batch.n_tokens;
 
-            GGML_ASSERT(ggml_backend_buffer_is_host(lctx.inp_KQ_mask->buffer));
 
-            float * data     = (float *) lctx.inp_KQ_mask->data;
+            float * data     = nullptr;
             float * data_swa = nullptr;
 
+            if (lctx.inp_KQ_mask) {
+                GGML_ASSERT(ggml_backend_buffer_is_host(lctx.inp_KQ_mask->buffer));
+                data = (float *) lctx.inp_KQ_mask->data;
+            }
+
             if (lctx.inp_KQ_mask_swa) {
+                GGML_ASSERT(ggml_backend_buffer_is_host(lctx.inp_KQ_mask_swa->buffer));
                 data_swa = (float *) lctx.inp_KQ_mask_swa->data;
             }
 
@@ -14048,7 +14054,10 @@ static void llama_set_inputs(llama_context & lctx, const llama_batch & batch) {
                                 f = 0.0f;
                             }
                         }
-                        data[h*(n_kv*n_tokens) + j*n_kv + i] = f;
+
+                        if (data) {
+                            data[h*(n_kv*n_tokens) + j*n_kv + i] = f;
+                        }
 
                         // may need to cut off old tokens for sliding window
                         if (data_swa) {
@@ -14060,9 +14069,19 @@ static void llama_set_inputs(llama_context & lctx, const llama_batch & batch) {
                     }
                 }
 
-                for (int i = n_tokens; i < GGML_PAD(n_tokens, GGML_KQ_MASK_PAD); ++i) {
-                    for (int j = 0; j < n_kv; ++j) {
-                        data[h*(n_kv*n_tokens) + i*n_kv + j] = -INFINITY;
+                if (data) {
+                    for (int i = n_tokens; i < GGML_PAD(n_tokens, GGML_KQ_MASK_PAD); ++i) {
+                        for (int j = 0; j < n_kv; ++j) {
+                            data[h*(n_kv*n_tokens) + i*n_kv + j] = -INFINITY;
+                        }
+                    }
+                }
+
+                if (data_swa) {
+                    for (int i = n_tokens; i < GGML_PAD(n_tokens, GGML_KQ_MASK_PAD); ++i) {
+                        for (int j = 0; j < n_kv; ++j) {
+                            data_swa[h*(n_kv*n_tokens) + i*n_kv + j] = -INFINITY;
+                        }
                     }
                 }
             }