[tyndur-devel] [PATCH] libc: liballoc holt erst kleinere Speicherbereiche

[Kevin Wolf <kevin@xxxxxxxxxx>]

* libc: Anstatt bei jedem Speicherbedarf 64k Speicher vom Kernel
  anzufordern, werden bei wenig genutztem Speicher zunaechst kleinere
  Allokationen durchgefuehrt. Dadurch sinkt der Speicherbedarf von
  kleinen Modulen deutlich von 64k auf 4k oder 8k.

Signed-off-by: Kevin Wolf <kevin@xxxxxxxxxx>
---
 src/lib/stdlibc/liballoc.c |   16 ++++++++++++++--
 1 files changed, 14 insertions(+), 2 deletions(-)

diff --git a/src/lib/stdlibc/liballoc.c b/src/lib/stdlibc/liballoc.c
index da125b3..591cd88 100644
--- a/src/lib/stdlibc/liballoc.c
+++ b/src/lib/stdlibc/liballoc.c
@@ -99,7 +99,7 @@ static struct liballoc_major *l_memRoot = NULL;	//< The root memory block acquir
 static struct liballoc_major *l_bestBet = NULL; //< The major with the most free memory.
 
 static int l_pageSize  = 4096;			//< The size of an individual page. Set up in liballoc_init.
-static int l_pageCount = 16;			//< The number of pages to request per chunk. Set up in liballoc_init.
+static int l_pageCount = 1;			//< The number of pages to request per chunk. Set up in liballoc_init.
 static long long l_allocated = 0;		//< Running total of allocated memory.
 static long long l_inuse	 = 0;		//< Running total of used memory.
 
@@ -262,7 +262,19 @@ static struct liballoc_major *allocate_new_page( uintptr_t size )
 			st  = st / (l_pageSize) + 1;
 							// No, add the buffer. 
 
-		
+        // Dynamically calculate minimum chunk size
+        if (l_allocated > 131072) {
+            l_pageCount = 16;
+        } else if (l_allocated > 65536) {
+            l_pageCount = 8;
+        } else if (l_allocated > 32768) {
+            l_pageCount = 4;
+        } else if (l_allocated > 16384) {
+            l_pageCount = 2;
+        } else {
+            l_pageCount = 1;
+        }
+
 		// Make sure it's >= the minimum size.
 		if ( st < l_pageCount ) st = l_pageCount;
 		
-- 
1.6.0.2