From df737041e4a9f3f55978cc74db9a9cea27fa9fa0 Mon Sep 17 00:00:00 2001
From: Determinant <ted.sybil@gmail.com>
Date: Fri, 5 Jun 2015 10:58:57 +0800
Subject: add profiling; add ce accurarcy; several other changes

---
 io/chunk_file.c   |  4 ++--
 io/sgd_buffer.lua | 14 +++++++++++++-
 2 files changed, 15 insertions(+), 3 deletions(-)

(limited to 'io')

diff --git a/io/chunk_file.c b/io/chunk_file.c
index ce346c5..4e987b7 100644
--- a/io/chunk_file.c
+++ b/io/chunk_file.c
@@ -268,7 +268,7 @@ int nerv_chunk_file_handle_destroy(lua_State *L) {
     return 0;
 }
 
-static int nerv_chunk_destroy(lua_State *L) {
+static int nerv_chunk_info_destroy(lua_State *L) {
     ChunkInfo *pci = luaT_checkudata(L, 1, nerv_chunk_info_tname);
     free(pci);
     return 0;
@@ -298,7 +298,7 @@ void nerv_chunk_file_init(lua_State *L) {
     luaT_newmetatable(L, nerv_chunk_file_handle_tname, NULL,
                         NULL, nerv_chunk_file_handle_destroy, NULL);
     luaT_newmetatable(L, nerv_chunk_info_tname, NULL,
-                        NULL, nerv_chunk_destroy, NULL);
+                        NULL, nerv_chunk_info_destroy, NULL);
     luaT_newmetatable(L, nerv_chunk_data_tname, NULL,
                         NULL, nerv_chunk_data_destroy, NULL);
 }
diff --git a/io/sgd_buffer.lua b/io/sgd_buffer.lua
index dadcf67..bf72744 100644
--- a/io/sgd_buffer.lua
+++ b/io/sgd_buffer.lua
@@ -4,6 +4,10 @@ function SGDBuffer:__init(global_conf, buffer_conf)
     self.gconf = global_conf
     self.buffer_size = math.floor(buffer_conf.buffer_size /
                                 global_conf.batch_size) * global_conf.batch_size
+    self.randomize = buffer_conf.randomize
+    if self.randomize == nil then
+        self.randomize = false
+    end
     self.head = 0
     self.tail = 0
     self.readers = {}
@@ -35,7 +39,9 @@ function SGDBuffer:saturate()
                     nerv.error("buffer size is too small to contain leftovers")
                 end
                 buff.data:copy_from(buff.leftover, 0, lrow)
+                buff.leftover = nil
             end
+            nerv.utils.printf("leftover: %d\n", lrow)
             reader.tail = lrow
             reader.has_leftover = false
         end
@@ -73,6 +79,8 @@ function SGDBuffer:saturate()
         end
         self.tail = math.min(self.tail, reader.tail)
     end
+    self.rand_map = nerv.MMatrixInt.perm_gen(self.tail) -- generate shuffled index
+    collectgarbage("collect")
     return self.tail >= self.gconf.batch_size
 end
 
@@ -90,7 +98,11 @@ function SGDBuffer:get_data()
     for i, reader in ipairs(self.readers) do
         for id, buff in pairs(reader.buffs) do
             local batch = self.gconf.cumat_type(batch_size, buff.width)
-            batch:copy_fromh(buff.data, self.head, self.head + batch_size)
+            if self.randomize then
+                batch:copy_rows_fromh_by_idx(buff.data, self.rand_map, self.head)
+            else
+                batch:copy_fromh(buff.data, self.head, self.head + batch_size)
+            end
             res[id] = batch
         end
     end
-- 
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