asr: memory-map the Parakeet GGUF by default, Android included

tools/omnivoice/src/eliza-asr-parakeet.inc

@@ -78,9 +78,9 @@ static int eliza_parakeet_load_locked(EliInferenceContext * ctx, char ** out_err
         return 0;
     }
     pk_params pp = pk_default_params();
-    /* same policy as the Qwen3-ASR path: Android's CPU profile keeps ASR
-     * weights in private memory (ELIZA_ASR_USE_MMAP overrides) */
-    pp.use_mmap = eliza_asr_use_mmap() ? 1 : 0;
+    /* the GGUF is used in place, so map it on every platform, Android
+     * included (ELIZA_ASR_USE_MMAP=0 reads it into private memory) */
+    pp.use_mmap = eliza_parakeet_use_mmap() ? 1 : 0;
     if (const char * env = std::getenv("ELIZA_ASR_THREADS")) {
         const int n = std::atoi(env);
         if (n > 0) pp.n_threads = n;

tools/omnivoice/src/eliza-inference-ffi.cpp

@@ -729,6 +729,15 @@ static bool eliza_asr_use_mmap() {
     return eliza_bool_env_or_default("ELIZA_ASR_USE_MMAP", !eliza_asr_android_cpu_profile());
 }
 
+// Parakeet-TDT (Phonon-2) reads its fv5 codes in place from the GGUF, so a
+// mapping costs only clean, reclaimable page cache. A private copy is a
+// ~320 MB anonymous allocation that a 4 GB Android device pushes to swap.
+// mmap is therefore the default on every platform; ELIZA_ASR_USE_MMAP=0
+// still selects the private copy.
+static bool eliza_parakeet_use_mmap() {
+    return eliza_bool_env_or_default("ELIZA_ASR_USE_MMAP", true);
+}
+
 static bool eliza_asr_use_extra_bufts() {
     return eliza_bool_env_or_default("ELIZA_ASR_USE_EXTRA_BUFTS", !eliza_asr_android_cpu_profile());
 }

tools/parakeet/README.md

@@ -128,6 +128,8 @@ whose `asr/` holds a GGUF with `general.architecture = parakeet-tdt` loads this
   word times.
 - `eliza_inference_asr_stream_supported()` returns 1 and the `asr_stream_*` session runs `pk-stream`. The
   stream does not return token ids, because Parakeet's vocabulary is not the text model's.
+- The GGUF is memory-mapped on every platform, Android included, so its pages stay clean and reclaimable.
+  `ELIZA_ASR_USE_MMAP=0` reads it into private memory instead (about 320 MB of anonymous memory).
 - `ELIZA_ASR_THREADS` sets the thread count. `ELIZA_ASR_STREAM_{RIGHT,HOP,MAX_WINDOW}_MS` tune the stream.
 
 ## Evidence boundary