Author: jhb Date: Mon May 18 19:33:59 2009 New Revision: 192331 URL: http://svn.freebsd.org/changeset/base/192331
Log: Bump CACHE_LINE_SIZE to 128 for x86. Intel's manuals explicitly recommend using 128 byte alignment for locks. (See IA-32 SDM Vol 3A 7.11.6.7) Modified: head/sys/amd64/include/param.h head/sys/i386/include/param.h Modified: head/sys/amd64/include/param.h ============================================================================== --- head/sys/amd64/include/param.h Mon May 18 19:26:25 2009 (r192330) +++ head/sys/amd64/include/param.h Mon May 18 19:33:59 2009 (r192331) @@ -93,7 +93,7 @@ * CACHE_LINE_SIZE is the compile-time maximum cache line size for an * architecture. It should be used with appropriate caution. */ -#define CACHE_LINE_SHIFT 6 +#define CACHE_LINE_SHIFT 7 #define CACHE_LINE_SIZE (1 << CACHE_LINE_SHIFT) /* Size of the level 1 page table units */ Modified: head/sys/i386/include/param.h ============================================================================== --- head/sys/i386/include/param.h Mon May 18 19:26:25 2009 (r192330) +++ head/sys/i386/include/param.h Mon May 18 19:33:59 2009 (r192331) @@ -78,7 +78,7 @@ * CACHE_LINE_SIZE is the compile-time maximum cache line size for an * architecture. It should be used with appropriate caution. */ -#define CACHE_LINE_SHIFT 6 +#define CACHE_LINE_SHIFT 7 #define CACHE_LINE_SIZE (1 << CACHE_LINE_SHIFT) #define PAGE_SHIFT 12 /* LOG2(PAGE_SIZE) */ _______________________________________________ svn-src-all@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/svn-src-all To unsubscribe, send any mail to "svn-src-all-unsubscr...@freebsd.org"
