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Enable reservation-based physical memory allocation. Even without the

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creation of large page mappings in the pmap, it can provide modest
performance benefits.  In particular, for a "buildworld" on a 2x 1GHz
Ultrasparc IIIi it reduced the wall clock time by 2.2% and the system
time by 12.6%.

Tested by:	marius@
This commit is contained in:
Alan Cox 2010-11-10 17:57:34 +00:00
parent 5b24354c79
commit 2cf36c8f67
2 changed files with 10 additions and 3 deletions
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11
sys/sparc64/include/vmparam.h
View File

@ -128,10 +128,17 @@
#endif
/*
* Disable superpage reservations.
* Enable superpage reservations: 1 level.
*/
#ifndef VM_NRESERVLEVEL
#define VM_NRESERVLEVEL 0
#define VM_NRESERVLEVEL 1
#endif
/*
* Level 0 reservations consist of 512 pages.
*/
#ifndef VM_LEVEL_0_ORDER
#define VM_LEVEL_0_ORDER 9
#endif
/*

2
sys/vm/vm_reserv.c
View File

@ -194,7 +194,7 @@ sysctl_vm_reserv_partpopq(SYSCTL_HANDLER_ARGS)
}
mtx_unlock(&vm_page_queue_free_mtx);
sbuf_printf(&sbuf, "%5d: %6dK, %6d\n", level,
unused_pages * (PAGE_SIZE / 1024), counter);
unused_pages * ((int)PAGE_SIZE / 1024), counter);
}
error = sbuf_finish(&sbuf);
sbuf_delete(&sbuf);