Author: lstewart Date: Sun Jun 13 02:39:55 2010 New Revision: 209119 URL: http://svn.freebsd.org/changeset/base/209119
Log: Add a utility macro to simplify calculating an aggregate sum from a DPCPU counter variable. Sponsored by: FreeBSD Foundation Reviewed by: jhb, rpaulo, rwatson (previous version of patch) MFC after: 1 week Modified: head/sys/sys/pcpu.h Modified: head/sys/sys/pcpu.h ============================================================================== --- head/sys/sys/pcpu.h Sun Jun 13 01:27:29 2010 (r209118) +++ head/sys/sys/pcpu.h Sun Jun 13 02:39:55 2010 (r209119) @@ -106,6 +106,17 @@ extern uintptr_t dpcpu_off[]; #define DPCPU_ID_GET(i, n) (*DPCPU_ID_PTR(i, n)) #define DPCPU_ID_SET(i, n, v) (*DPCPU_ID_PTR(i, n) = v) +/* + * Utility macros. + */ +#define DPCPU_SUM(n, var, sum) \ +do { \ + (sum) = 0; \ + u_int i; \ + CPU_FOREACH(i) \ + (sum) += (DPCPU_ID_PTR(i, n))->var; \ +} while (0) + /* * XXXUPS remove as soon as we have per cpu variable * linker sets and can define rm_queue in _rm_lock.h _______________________________________________ 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"