b97d3a9cbc
DSW keeps an internal port load estimate, used by the load balancing mechanism. As a side effect, it keeps track of the total number of busy cycles since startup. This metric is indirectly exposed in the form of DSW xstats' "port_<n>_event_proc_latency", which is the total number of busy cycles divided by the total number of events processed on a particular port. An external application can take (event_latency * dequeued) to go back to busy_cycles. One reason for doing this is to measure the port's load during a longer time period, without resorting to sampling "port_<n>_load". However, as the number dequeued events grows, a rounding error in event_latency renders the application-calculated busy_cycles inaccurate. Thus, it makes sense to directly expose the number of busy cycles as a DSW xstats, even though it might seem redundant. Signed-off-by: Mattias Rönnblom <mattias.ronnblom@ericsson.com>
DPDK is a set of libraries and drivers for fast packet processing. It supports many processor architectures and both FreeBSD and Linux. The DPDK uses the Open Source BSD-3-Clause license for the core libraries and drivers. The kernel components are GPL-2.0 licensed. Please check the doc directory for release notes, API documentation, and sample application information. For questions and usage discussions, subscribe to: users@dpdk.org Report bugs and issues to the development mailing list: dev@dpdk.org