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Command to print total kernel heap usage for debugging.

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This commit is contained in:
Geoffrey Challen
2016-02-11 16:56:51 -05:00
parent 27b85a44ab
commit db6d3d219d
3 changed files with 57 additions and 15 deletions
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57
kern/vm/kmalloc.c
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@@ -31,6 +31,8 @@
#include <lib.h>
#include <spinlock.h>
#include <vm.h>
#include <kern/secret.h>
#include <test.h>
/*
* Kernel malloc.
@@ -743,8 +745,8 @@ kheap_dumpall(void)
* Print the allocated/freed map of a single kernel heap page.
*/
static
void
subpage_stats(struct pageref *pr)
unsigned long
subpage_stats(struct pageref *pr, bool quiet)
{
vaddr_t prpage, fla;
struct freelist *fl;
@@ -779,19 +781,22 @@ subpage_stats(struct pageref *pr)
freemap[index/32] |= (1<<(index%32));
}
}
kprintf("at 0x%08lx: size %-4lu %u/%u free\n",
(unsigned long)prpage, (unsigned long) sizes[blktype],
(unsigned) pr->nfree, n);
kprintf(" ");
for (i=0; i<n; i++) {
int val = (freemap[i/32] & (1<<(i%32)))!=0;
kprintf("%c", val ? '.' : '*');
if (i%64==63 && i<n-1) {
kprintf("\n ");
if (!quiet) {
kprintf("at 0x%08lx: size %-4lu %u/%u free\n",
(unsigned long)prpage, (unsigned long) sizes[blktype],
(unsigned) pr->nfree, n);
kprintf(" ");
for (i=0; i<n; i++) {
int val = (freemap[i/32] & (1<<(i%32)))!=0;
kprintf("%c", val ? '.' : '*');
if (i%64==63 && i<n-1) {
kprintf("\n ");
}
}
kprintf("\n");
}
kprintf("\n");
return ((unsigned long)sizes[blktype] * (n - (unsigned) pr->nfree));
}
/*
@@ -806,14 +811,36 @@ kheap_printstats(void)
spinlock_acquire(&kmalloc_spinlock);
kprintf("Subpage allocator status:\n");
for (pr = allbase; pr != NULL; pr = pr->next_all) {
subpage_stats(pr);
subpage_stats(pr, false);
}
spinlock_release(&kmalloc_spinlock);
}
/*
* Print the whole heap.
*/
void
kheap_printused(void)
{
struct pageref *pr;
unsigned long total = 0;
/* print the whole thing with interrupts off */
spinlock_acquire(&kmalloc_spinlock);
for (pr = allbase; pr != NULL; pr = pr->next_all) {
total += subpage_stats(pr, true);
}
spinlock_release(&kmalloc_spinlock);
char total_string[32];
snprintf(total_string, sizeof(total_string), "%lu", total);
ksecprintf(SECRET, total_string, "khu");
}
////////////////////////////////////////
/*