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Fix attempt for benchmark memory allocation (#19)

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This commit is contained in:
Sam Demeulemeester 2022-03-23 21:15:35 +01:00
parent b4bab4f829
commit 8e35753ce8
1 changed files with 22 additions and 12 deletions
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34
system/cpuinfo.c
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@ -20,6 +20,7 @@
#include "io.h"
#include "tsc.h"
#include "boot.h"
#include "pmem.h"
#include "memsize.h"
@ -993,29 +994,38 @@ static uint32_t memspeed(uint64_t src, uint32_t len, uint16_t iter)
static void measure_memory_bandwidth(void)
{
uint64_t bench_start_adr = 0;
uint32_t mem_test_len;
uint8_t i;
uintptr_t bench_start_adr = 0;
size_t mem_test_len;
if(l3_cache){
if (l3_cache) {
mem_test_len = 4*l3_cache*1024;
} else if(l2_cache) {
} else if (l2_cache) {
mem_test_len = 4*l2_cache*1024;
} else {
mem_test_len = 1024*1024; // 1MB
}
// Locate enough free space for tests
for(i = 0; i < MAX_MEM_SEGMENTS; i++)
{
// Ugly and needs fix, but should work at this stage
if((pm_map[i].end - pm_map[i].start) > ((mem_test_len*2) >> (PAGE_SHIFT-4))) {
bench_start_adr = pm_map[i].start << (PAGE_SHIFT+4);
// Locate enough free space for tests. We require the space to be mapped into
// our virtual address space, which limits us to the first 3GB.
// FIXME: The 3GB limit should be defined by vmem.h
for (int i = 0; i < pm_map_size && pm_map[i].start < PAGE_C(3,GB); i++) {
uintptr_t try_start = pm_map[i].start << PAGE_SHIFT;
uintptr_t try_end = try_start + mem_test_len;
// Avoid the memory region where the program is currently located.
if (try_start < (uintptr_t)_end && try_end > (uintptr_t)_start) {
try_start = (uintptr_t)_end;
try_end = try_start + mem_test_len;
}
uintptr_t end_limit = pm_map[i].end < PAGE_C(3,GB) ? pm_map[i].end << PAGE_SHIFT : SIZE_C(3,GB);
if (try_end <= end_limit) {
bench_start_adr = try_start;
break;
}
}
if(bench_start_adr == 0){
if (bench_start_adr == 0) {
return;
}