Changeset b0c2075 in mainline for kernel/test/mm/falloc2.c

Timestamp:

2013-09-10T17:48:57Z (11 years ago)

Author:

Martin Decky <martin@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

85147f3

Parents:

86733f3

Message:

new physical memory allocator supporting physical address constrains
the buddy allocator framework is retired and replaced by a two-level bitmap
the allocator can allocate an arbitrary number of frames, not only a power-of-two count

Caution: Change of semantics
The physical memory allocator no longer allocates naturally aligned blocks. If you require an aligned block, specify it as the constraint.

File:

• kernel/test/mm/falloc2.c (modified) (3 diffs)

kernel/test/mm/falloc2.c

@@ -40 +40 @@
 #include <arch.h>
 
-#define MAX_FRAMES  256U
-#define MAX_ORDER   8
+#define MAX_FRAMES  256
 
 #define THREAD_RUNS  1
@@ -66 +65 @@
         
         for (unsigned int run = 0; run < THREAD_RUNS; run++) {
-                for (unsigned int order = 0; order <= MAX_ORDER; order++) {
+                for (size_t count = 1; count <= MAX_FRAMES; count++) {
+                        size_t bytes = FRAMES2SIZE(count);
+                        
                         TPRINTF("Thread #%" PRIu64 " (cpu%u): "
-                            "Allocating %u frames blocks ... \n", THREAD->tid,
-                            CPU->id, 1 << order);
+                            "Allocating %zu frames blocks (%zu bytes) ... \n", THREAD->tid,
+                            CPU->id, count, bytes);
                         
                         unsigned int allocated = 0;
-                        for (unsigned int i = 0; i < (MAX_FRAMES >> order); i++) {
+                        for (unsigned int i = 0; i < (MAX_FRAMES / count); i++) {
                                 frames[allocated] =
-                                    PA2KA(frame_alloc(order, FRAME_ATOMIC, 0));
+                                    PA2KA(frame_alloc(count, FRAME_ATOMIC, 0));
                                 if (frames[allocated]) {
-                                        memsetb((void *) frames[allocated], FRAME_SIZE << order, val);
+                                        memsetb((void *) frames[allocated], bytes, val);
                                         allocated++;
                                 } else
@@ -89 +90 @@
                         
                         for (unsigned int i = 0; i < allocated; i++) {
-                                for (size_t k = 0; k <= (((size_t) FRAME_SIZE << order) - 1);
-                                    k++) {
+                                for (size_t k = 0; k < bytes; k++) {
                                         if (((uint8_t *) frames[i])[k] != val) {
                                                 TPRINTF("Thread #%" PRIu64 " (cpu%u): "