Date: Fri, 3 Aug 2007 17:26:49 +0200 (CEST) From: Wojciech Puchar <wojtek@wojtek.tensor.gdynia.pl> To: freebsd-questions@freebsd.org Subject: parformance patch? Message-ID: <20070803172639.F17414@wojtek.tensor.gdynia.pl>
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is anything wrong in this? --- vm_fault.c.orig Fri Aug 3 15:01:27 2007 +++ vm_fault.c Thu Aug 2 15:56:17 2007 @@ -113,8 +113,8 @@ static int vm_fault_additional_pages(vm_page_t, int, int, vm_page_t *, int *); static void vm_fault_prefault(pmap_t, vm_offset_t, vm_map_entry_t); -#define VM_FAULT_READ_AHEAD 8 -#define VM_FAULT_READ_BEHIND 7 +#define VM_FAULT_READ_AHEAD 64 +#define VM_FAULT_READ_BEHIND 63 #define VM_FAULT_READ (VM_FAULT_READ_AHEAD+VM_FAULT_READ_BEHIND+1) struct faultstate { and --- param.h.orig Fri Aug 3 15:02:37 2007 +++ param.h Wed Jul 11 11:46:24 2007 @@ -125,7 +125,7 @@ #define DFLTPHYS (64 * 1024) /* default max raw I/O transfer size */ #endif #ifndef MAXPHYS -#define MAXPHYS (128 * 1024) /* max raw I/O transfer size */ +#define MAXPHYS (512 * 1024) /* max raw I/O transfer size */ #endif #ifndef MAXDUMPPGS #define MAXDUMPPGS (DFLTPHYS/PAGE_SIZE) both works for me and gives noticable speedup, when operating on big files and when starting big apps or swapping. other question (swap_pager.c): /* * SWB_NPAGES must be a power of 2. It may be set to 1, 2, 4, 8, or 16 * pages per allocation. We recommend you stick with the default of 8. * The 16-page limit is due to the radix code (kern/subr_blist.c). */ #ifndef MAX_PAGEOUT_CLUSTER #define MAX_PAGEOUT_CLUSTER 16 #endif can this be changed/fixed? 64-128 would be nicer...
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