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Sun, 26 Jun 2022 11:15:03 -0400 (EDT) From: Thomas Monjalon To: Heinrich Schuchardt Cc: David Marchand , dev@dpdk.org, Chenbo Xia , Ajit Khaparde , Rosen Xu , Stephen Hemminger , Joyce Kong , Jie Zhou , dev@dpdk.org, konstantin.v.ananyev@yandex.ru, ferruh.yigit@amd.com, andrew.rybchenko@oktetlabs.ru Subject: Re: [PATCH 1/1] test/pmd_perf: handling of unknown connection speed Date: Sun, 26 Jun 2022 17:15:02 +0200 Message-ID: <6192851.a9HWlOh95j@thomas> In-Reply-To: <20220511163310.50892-1-heinrich.schuchardt@canonical.com> References: <20220511163310.50892-1-heinrich.schuchardt@canonical.com> MIME-Version: 1.0 Content-Transfer-Encoding: 7Bit Content-Type: text/plain; charset="us-ascii" X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org 11/05/2022 18:33, Heinrich Schuchardt: > When running DPDK in QEMU it cannot determine the connection speed. > pmd_perf_autotest treats this as if the connection speed where > UNIT32_MAX Mbps: > > RTE>>pmd_perf_autotest > Start PMD RXTX cycles cost test. > Allocated mbuf pool on socket 0 > CONFIG RXD=1024 TXD=1024 > Performance test runs on lcore 1 socket 0 > Port 0 Address:52:54:00:12:34:57 > Port 1 Address:52:54:00:12:34:58 > Checking link statuses... > Port 0 Link up at Unknown FDX Autoneg > Port 1 Link up at Unknown FDX Autoneg > IPv4 pktlen 46 > UDP pktlen 26 > Generate 4096 packets @socket 0 > inject 2048 packet to port 0 > inject 2048 packet to port 1 > Total packets inject to prime ports = 4096 > Each port will do 6391320379464 packets per second > Test will stop after at least 25565281517856 packets received > > This will not allow the test to terminate in a reasonable timespan. > Just assume 10 Gbps in this case instead: > > ... > Test will stop after at least 59523808 packets received > > Signed-off-by: Heinrich Schuchardt > --- > app/test/test_pmd_perf.c | 15 +++++++++++---- > 1 file changed, 11 insertions(+), 4 deletions(-) > > diff --git a/app/test/test_pmd_perf.c b/app/test/test_pmd_perf.c > index 25611bfe9b..ee08c8aade 100644 > --- a/app/test/test_pmd_perf.c > +++ b/app/test/test_pmd_perf.c > @@ -486,10 +486,17 @@ main_loop(__rte_unused void *args) > } > printf("Total packets inject to prime ports = %u\n", idx); > > - packets_per_second = (link_mbps * 1000 * 1000) / > - ((PACKET_SIZE + FRAME_GAP + MAC_PREAMBLE) * CHAR_BIT); > - printf("Each port will do %"PRIu64" packets per second\n", > - packets_per_second); > + if (link_mbps != RTE_ETH_SPEED_NUM_UNKNOWN) { > + packets_per_second = (link_mbps * 1000 * 1000) / > + ((PACKET_SIZE + FRAME_GAP + MAC_PREAMBLE) * CHAR_BIT); > + printf("Each port will do %"PRIu64" packets per second\n", > + packets_per_second); > + total_packets = RTE_TEST_DURATION * conf->nb_ports * packets_per_second; This is redundant with below. > + } else { > + /* We don't know the speed. Pretend it is 10G */ > + packets_per_second = ((uint64_t)RTE_ETH_SPEED_NUM_10G * 1000 * 1000) / > + ((PACKET_SIZE + FRAME_GAP + MAC_PREAMBLE) * CHAR_BIT); > + } > > total_packets = RTE_TEST_DURATION * conf->nb_ports * packets_per_second; Why not just inserting this: if (link_mbps == RTE_ETH_SPEED_NUM_UNKNOWN) link_mbps = RTE_ETH_SPEED_NUM_10G;