d/freebsd-skq
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Re-instate UMA cached backend for 4K - 64K allocations. New consumers

Browse Source 
like geli(4) uses malloc(9) to allocate temporary buffers that gets
free'ed shortly, causing frequent TLB shootdown as observed in hwpmc
supported flame graph.

Discussed with:	jeff, alfred
MFC after:	1 week
This commit is contained in:
Xin LI 2014-08-14 05:13:24 +00:00
parent 477867a0e5
commit bda06553fd
1 changed files with 1 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
sys/kern/kern_malloc.c
View File

@ -120,7 +120,7 @@ static int kmemcount;
#define KMEM_ZBASE 16 #define KMEM_ZBASE 16
#define KMEM_ZMASK (KMEM_ZBASE - 1) #define KMEM_ZMASK (KMEM_ZBASE - 1)
#define KMEM_ZMAX PAGE_SIZE #define KMEM_ZMAX 65536
#define KMEM_ZSIZE (KMEM_ZMAX >> KMEM_ZSHIFT) #define KMEM_ZSIZE (KMEM_ZMAX >> KMEM_ZSHIFT)
static uint8_t kmemsize[KMEM_ZSIZE + 1]; static uint8_t kmemsize[KMEM_ZSIZE + 1];
@ -151,21 +151,10 @@ struct {
{1024, "1024", }, {1024, "1024", },
{2048, "2048", }, {2048, "2048", },
{4096, "4096", }, {4096, "4096", },
#if PAGE_SIZE > 4096
{8192, "8192", }, {8192, "8192", },
#if PAGE_SIZE > 8192
{16384, "16384", }, {16384, "16384", },
#if PAGE_SIZE > 16384
{32768, "32768", }, {32768, "32768", },
#if PAGE_SIZE > 32768
{65536, "65536", }, {65536, "65536", },
#if PAGE_SIZE > 65536
#error "Unsupported PAGE_SIZE"
#endif /* 65536 */
#endif /* 32768 */
#endif /* 16384 */
#endif /* 8192 */
#endif /* 4096 */
{0, NULL}, {0, NULL},
}; };