>From: Xie, Huawei [mailto:huawei.xie at intel.com] >Sent: Monday, December 21, 2015 7:22 AM >Subject: Re: [dpdk-dev] [PATCH v2 1/2] mbuf: provide rte_pktmbuf_alloc_bulk API > >The loop unwinding could give performance gain. The only problem is the >switch/loop >combination makes people feel weird at the first glance but soon they will >grasp this style. >Since this is inherited from old famous duff's device, i prefer to keep this >style which saves >lines of code.
You don't really mean "lines of code", of course, since it increases the lines of code. It reduces the number of branches. Is Duff's Device used in other "bulk" routines? If not, what justifies making this a special case? -don provan dprovan at bivio.net
