On Friday, May 04, 2018 06:51:02 AM Matt Macy wrote: > Author: mmacy > Date: Fri May 4 06:51:01 2018 > New Revision: 333242 > URL: https://svnweb.freebsd.org/changeset/base/333242 > > Log: > `dup1_processes -t 96 -s 5` on a dual 8160 > > x dup_before > + dup_after > +------------------------------------------------------------+ > | x + | > |x x x x ++ ++| > | |____AM___| |AM|| > +------------------------------------------------------------+ > N Min Max Median Avg Stddev > x 5 1.514954e+08 1.5230351e+08 1.5206157e+08 1.5199371e+08 341205.71 > + 5 1.5494336e+08 1.5519569e+08 1.5511982e+08 1.5508323e+08 96232.829 > Difference at 95.0% confidence > 3.08952e+06 +/- 365604 > 2.03266% +/- 0.245071% > (Student's t, pooled s = 250681)
The log doesn't quite describe what the change is though and why it results in this change. bcopy -> memcpy to permit using the compiler builtin I understand, but using memcpy instead of a structure copy seems rather odd as I would expect the compiler to treat a structure copy as the same as __builtin_memcpy(). > Reported by: mjg@ > MFC after: 1 week > > Modified: > head/sys/kern/kern_descrip.c > > Modified: head/sys/kern/kern_descrip.c > ============================================================================== > --- head/sys/kern/kern_descrip.c Fri May 4 04:05:07 2018 > (r333241) > +++ head/sys/kern/kern_descrip.c Fri May 4 06:51:01 2018 > (r333242) > @@ -1503,7 +1503,7 @@ filecaps_copy(const struct filecaps *src, struct filec > > if (src->fc_ioctls != NULL && !locked) > return (false); > - *dst = *src; > + memcpy(dst, src, sizeof(*src)); > if (src->fc_ioctls == NULL) > return (true); > > @@ -1512,7 +1512,7 @@ filecaps_copy(const struct filecaps *src, struct filec > > size = sizeof(src->fc_ioctls[0]) * src->fc_nioctls; > dst->fc_ioctls = malloc(size, M_FILECAPS, M_WAITOK); > - bcopy(src->fc_ioctls, dst->fc_ioctls, size); > + memcpy(dst->fc_ioctls, src->fc_ioctls, size); > return (true); > } > > -- John Baldwin _______________________________________________ svn-src-head@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-head To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"
