File vdr-2.4.7_FADVISE-Enable.patch of Package vdr

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File vdr-2.4.7_FADVISE-Enable.patch of Package vdr

--- a/tools.c
+++ b/tools.c
@@ -1781,7 +1781,7 @@
 // --- cUnbufferedFile -------------------------------------------------------
 
 #ifndef USE_FADVISE_READ
-#define USE_FADVISE_READ 0
+#define USE_FADVISE_READ 1
 #endif
 #ifndef USE_FADVISE_WRITE
 #define USE_FADVISE_WRITE 1
@@ -1808,11 +1808,11 @@
   begin = lastpos = ahead = 0;
   cachedstart = 0;
   cachedend = 0;
-  readahead = KILOBYTE(128);
+  readahead = KILOBYTE(256);
   written = 0;
   totwritten = 0;
   if (fd >= 0)
-     posix_fadvise(fd, 0, 0, POSIX_FADV_RANDOM); // we could use POSIX_FADV_SEQUENTIAL, but we do our own readahead, disabling the kernel one.
+     posix_fadvise(fd, 0, 0, POSIX_FADV_SEQUENTIAL); // we could use POSIX_FADV_SEQUENTIAL, but we do our own readahead, disabling the kernel one.
 #endif
   return fd;
 }
@@ -1885,13 +1885,14 @@
            // Trigger the readahead IO, but only if we've used at least
            // 1/2 of the previously requested area. This avoids calling
            // fadvise() after every read() call.
-           if (ahead - curpos < (off_t)(readahead / 2)) {
+           if (ahead - curpos < (off_t)((readahead * 1 )/ 10)) {
               posix_fadvise(fd, curpos, readahead, POSIX_FADV_WILLNEED);
               ahead = curpos + readahead;
               cachedend = max(cachedend, ahead);
               }
            if (readahead < Size * 32) { // automagically tune readahead size.
               readahead = Size * 32;
+	      isyslog("Adjusting read ahead to: %jd KB", (intmax_t) readahead / 1024);
               }
            }
         else

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File vdr-2.4.7_FADVISE-Enable.patch of Package vdr

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