On 10/03/2018 07:57 PM, Jens Freimann wrote: > This adds a new forwarding mode to testpmd to simulate > more realistic behavior of a guest machine engaged in receiving > and sending packets performing Virtual Network Function (VNF). > > The goal is to enable a simple way of measuring performance impact on > cache and memory footprint utilization from various VNF co-located on > the same host machine. For this it does: > > * Buffer packets in a FIFO: > > Create a fifo to buffer received packets. Once it flows over put > those packets into the actual tx queue. The fifo is created per tx > queue and its size can be set with the --noisy-tx-sw-buffer-flushtime > commandline parameter. > > A second commandline parameter is used to set a timeout in > milliseconds after which the fifo is flushed. > > --noisy-tx-sw-buffer-size [packet numbers] > Keep the mbuf in a FIFO and forward the over flooding packets from the > FIFO. This queue is per TX-queue (after all other packet processing). > > --noisy-tx-sw-buffer-flushtime [delay] > Flush the packet queue if no packets have been seen during > [delay]. As long as packets are seen, the timer is reset. > > Add several options to simulate route lookups (memory reads) in tables > that can be quite large, as well as route hit statistics update. > These options simulates the while stack traversal and > will trash the cache. Memory access is random. > > * simulate route lookups: > > Allocate a buffer and perform reads and writes on it as specified by > commandline options: > > --noisy-lkup-memory [size] > Size of the VNF internal memory (MB), in which the random > read/write will be done, allocated by rte_malloc (hugepages). > > --noisy-lkup-num-writes [num] > Number of random writes in memory per packet should be > performed, simulating hit-flags update. 64 bits per write, > all write in different cache lines. > > --noisy-lkup-num-reads [num] > Number of random reads in memory per packet should be > performed, simulating FIB/table lookups. 64 bits per read, > all write in different cache lines. > > --noisy-lkup-num-reads-writes [num] > Number of random reads and writes in memory per packet should > be performed, simulating stats update. 64 bits per read-write, all > reads and writes in different cache lines. > > Signed-off-by: Jens Freimann <jfreim...@redhat.com> >
Acked-by: Kevin Traynor <ktray...@redhat.com>
