added new flag nofastforward allowing users to disable fast forwarding

expose.h

@@ -45,6 +45,7 @@ struct load_model_inputs
     const bool use_mlock = false;
     const bool use_smartcontext = false;
     const bool use_contextshift = false;
+    const bool use_fastforward = false;
     const int clblast_info = 0;
     const int cublas_info = 0;
     const char * vulkan_info = nullptr;

gpttype_adapter.cpp

@@ -1688,6 +1688,7 @@ ModelLoadResult gpttype_load_model(const load_model_inputs inputs, FileFormat in
     kcpp_data->model_filename = inputs.model_filename;
     kcpp_data->use_smartcontext = inputs.use_smartcontext;
     kcpp_data->use_contextshift = inputs.use_contextshift;
+    kcpp_data->use_fastforward = inputs.use_fastforward;
     debugmode = inputs.debugmode;
 
     auto clamped_max_context_length = inputs.max_context_length;
@@ -2951,7 +2952,10 @@ generation_outputs gpttype_generate(const generation_inputs inputs)
     {
         if(!blank_prompt)
         {
-            ContextFastForward(current_context_tokens, embd_inp, n_past, last_n_tokens, nctx, smartcontext, false, true);
+            if(kcpp_data->use_fastforward)
+            {
+                ContextFastForward(current_context_tokens, embd_inp, n_past, last_n_tokens, nctx, smartcontext, false, true);
+            }
         }
         if(is_mamba || is_rwkv_new)
         {
@@ -2971,12 +2975,15 @@ generation_outputs gpttype_generate(const generation_inputs inputs)
         bool triggersc = kcpp_data->use_smartcontext;
         if(!blank_prompt) //special case for blank prompts, no fast forward or shifts
         {
-            if(kcpp_data->use_contextshift && (file_format == FileFormat::GGUF_GENERIC))
+            if(kcpp_data->use_fastforward && kcpp_data->use_contextshift && (file_format == FileFormat::GGUF_GENERIC))
             {
                 PurgeMissingTokens(llama_ctx_v4, current_context_tokens, embd_inp, inputs.max_length, nctx);
                 triggersc = false;
             }
-            ContextFastForward(current_context_tokens, embd_inp, n_past, last_n_tokens, nctx, smartcontext, triggersc, false);
+            if(kcpp_data->use_fastforward)
+            {
+                ContextFastForward(current_context_tokens, embd_inp, n_past, last_n_tokens, nctx, smartcontext, triggersc, false);
+            }
         }
         if(file_format == FileFormat::GGUF_GENERIC)
         {

koboldcpp.py

@@ -129,6 +129,7 @@ class load_model_inputs(ctypes.Structure):
                 ("use_mlock", ctypes.c_bool),
                 ("use_smartcontext", ctypes.c_bool),
                 ("use_contextshift", ctypes.c_bool),
+                ("use_fastforward", ctypes.c_bool),
                 ("clblast_info", ctypes.c_int),
                 ("cublas_info", ctypes.c_int),
                 ("vulkan_info", ctypes.c_char_p),
@@ -869,6 +870,7 @@ def load_model(model_filename):
     inputs.mmproj_filename = args.mmproj.encode("UTF-8") if args.mmproj else "".encode("UTF-8")
     inputs.use_smartcontext = args.smartcontext
     inputs.use_contextshift = (0 if args.noshift else 1)
+    inputs.use_fastforward = (0 if args.nofastforward else 1)
     inputs.flash_attention = args.flashattention
     if args.quantkv>0:
         inputs.quant_k = inputs.quant_v = args.quantkv
@@ -2494,6 +2496,7 @@ def show_gui():
     rowsplit_var = ctk.IntVar()
 
     contextshift = ctk.IntVar(value=1)
+    fastforward = ctk.IntVar(value=1)
     remotetunnel = ctk.IntVar(value=0)
     smartcontext = ctk.IntVar()
     flashattention = ctk.IntVar(value=0)
@@ -2739,10 +2742,16 @@ def show_gui():
     gpu_choice_var.trace("w", changed_gpu_choice_var)
     gpulayers_var.trace("w", changed_gpulayers_estimate)
 
+    def togglefastforward(a,b,c):
+        if fastforward.get()==0:
+            contextshift.set(0)
+            togglectxshift(1,1,1)
+
     def togglectxshift(a,b,c):
         if contextshift.get()==0:
             smartcontextbox.grid()
         else:
+            fastforward.set(1)
             smartcontextbox.grid_remove()
 
         if contextshift.get()==0 and flashattention.get()==1:
@@ -2951,7 +2960,7 @@ def show_gui():
     # tokens checkboxes
     smartcontextbox = makecheckbox(tokens_tab, "Use SmartContext", smartcontext, 1,tooltiptxt="Uses SmartContext. Now considered outdated and not recommended.\nCheck the wiki for more info.")
     makecheckbox(tokens_tab, "Use ContextShift", contextshift, 2,tooltiptxt="Uses Context Shifting to reduce reprocessing.\nRecommended. Check the wiki for more info.", command=togglectxshift)
-
+    makecheckbox(tokens_tab, "Use FastForwarding", fastforward, 3,tooltiptxt="Use fast forwarding to recycle previous context (always reprocess if disabled).\nRecommended.", command=togglefastforward)
 
     # context size
     makeslider(tokens_tab, "Context Size:",contextsize_text, context_var, 0, len(contextsize_text)-1, 20, width=280, set=5,tooltip="What is the maximum context size to support. Model specific. You cannot exceed it.\nLarger contexts require more memory, and not all models support it.")
@@ -3151,6 +3160,7 @@ def show_gui():
         args.smartcontext = smartcontext.get()==1
         args.flashattention = flashattention.get()==1
         args.noshift = contextshift.get()==0
+        args.nofastforward = fastforward.get()==0
         args.remotetunnel = remotetunnel.get()==1
         args.foreground = keepforeground.get()==1
         args.quiet = quietmode.get()==1
@@ -3300,6 +3310,7 @@ def show_gui():
         smartcontext.set(1 if "smartcontext" in dict and dict["smartcontext"] else 0)
         flashattention.set(1 if "flashattention" in dict and dict["flashattention"] else 0)
         contextshift.set(0 if "noshift" in dict and dict["noshift"] else 1)
+        fastforward.set(0 if "nofastforward" in dict and dict["nofastforward"] else 1)
         remotetunnel.set(1 if "remotetunnel" in dict and dict["remotetunnel"] else 0)
         keepforeground.set(1 if "foreground" in dict and dict["foreground"] else 0)
         quietmode.set(1 if "quiet" in dict and dict["quiet"] else 0)
@@ -4645,6 +4656,7 @@ if __name__ == '__main__':
     advparser.add_argument("--blasthreads", help="Use a different number of threads during BLAS if specified. Otherwise, has the same value as --threads",metavar=('[threads]'), type=int, default=0)
     advparser.add_argument("--lora", help="LLAMA models only, applies a lora file on top of model. Experimental.", metavar=('[lora_filename]', '[lora_base]'), nargs='+')
     advparser.add_argument("--noshift", help="If set, do not attempt to Trim and Shift the GGUF context.", action='store_true')
+    advparser.add_argument("--nofastforward", help="If set, do not attempt to fast forward GGUF context (always reprocess). Will also enable noshift", action='store_true')
     advparser.add_argument("--nommap", help="If set, do not use mmap to load newer models", action='store_true')
     advparser.add_argument("--usemlock", help="Enables mlock, preventing the RAM used to load the model from being paged out. Not usually recommended.", action='store_true')
     advparser.add_argument("--noavx2", help="Do not use AVX2 instructions, a slower compatibility mode for older devices.", action='store_true')

otherarch/otherarch.h

@@ -54,6 +54,7 @@ struct kcpp_params {
     bool flash_attn                  = false; // flash attention
     bool use_smartcontext            = false;
     bool use_contextshift            = false;
+    bool use_fastforward             = false;
 };
 
 // default hparams (GPT-J 6B)