Hi, Alfredo Thank you for the full answer. It would be great if you find workaround for this.
Ilya. 2014-09-04 14:52 GMT+04:00 Alfredo Cardigliano <[email protected]>: > Hi Ilya > unfortunately this is a limitation of the 82576 chipset: > since ZC (as DNA) drivers are very close to hw, they read drops from NIC > counters, > on this card the counter is able to accumulate up to 4K. > Each time we read stats (every second in this case) we reset this counter, > thus you see 4k drops per second. > We will try to find a workaround for this. > > Alfredo > > On 01 Sep 2014, at 16:58, Ilya Gavrilov <[email protected]> wrote: > >> Hi Alfredo, >> >> I am using PF_RING 6.0.1, intel gigabit adapters: >> 03:00.0 Ethernet controller: Intel Corporation 82576 Gigabit Network >> Connection (rev 01) >> 03:00.1 Ethernet controller: Intel Corporation 82576 Gigabit Network >> Connection (rev 01) >> >> with driver from drivers/PF_RING_aware/intel/igb/igb-5.2.5-zc/src >> drivers loaded withs script load_driver.sh from this directory >> >> packet rate is about 53kpkt/s >> >> 1. with not modified zcount, I get next output >> >> sudo ./zcount -i zc:eth4 -c 99 >> ..... >> ========================= >> Absolute Stats: 537'361 pkts (0 drops) - 256'858'558 bytes >> Actual Stats: 53'731.73 pps (0.00 drops) - 0.21 Gbps >> ========================= >> >> sudo ./zcount -i eth4 -c 99 >> .... >> ========================= >> Absolute Stats: 376'166 pkts (0 drops) - 179'807'348 bytes >> Actual Stats: 53'731.08 pps (0.00 drops) - 0.21 Gbps >> ========================= >> >> 2. with modified zcount ( usleep(1) after pfring_zc_recv_pkt line ): >> >> sudo ./zcount_slow -i zc:eth4 -c 99 >> .... >> ========================= >> Absolute Stats: 112'809 pkts (24'570 drops) - 53'922'702 bytes >> Actual Stats: 18'808.28 pps (4'094.62 drops) - 0.07 Gbps >> ========================= >> >> sudo ./zcount_slow -i eth4 -c 99 >> .... >> ========================= >> Absolute Stats: 150'821 pkts (262'184 drops) - 72'092'438 bytes >> Actual Stats: 18'834.86 pps (34'896.90 drops) - 0.07 Gbps >> ========================= >> >> So, I get wrong drops when run command sudo ./zcount_slow -i zc:eth4 -c 99 >> >> Ilya. >> >> 2014-09-01 18:29 GMT+04:00 Alfredo Cardigliano <[email protected]>: >>> Hi Ilya >>> please provide more details about your configuration in order to reproduce >>> the issue: >>> - driver model/version >>> - ingress packet rate >>> - command and some output from zcount >>> >>> Alfredo >>> >>> On 01 Sep 2014, at 15:14, Ilya Gavrilov <[email protected]> wrote: >>> >>>> Hello, >>>> >>>> I am using pfring in zc mode and want to get number of lost packets on >>>> interface. >>>> It seems pfring_zc_stats doesn't get real number in zc mode. >>>> >>>> if i add usleep(1); after getting each packet to zcount.c example >>>> application >>>> i get very small Actual stats pps, but Actual stats drop is very >>>> small, always about 4000. >>>> >>>> In non-zc mode i get real number of lost packets. >>>> >>>> How can I get real number of lost packets on interface? >>>> >>>> Please, help, >>>> Ilya. >>>> _______________________________________________ >>>> Ntop-misc mailing list >>>> [email protected] >>>> http://listgateway.unipi.it/mailman/listinfo/ntop-misc >>> >>> _______________________________________________ >>> Ntop-misc mailing list >>> [email protected] >>> http://listgateway.unipi.it/mailman/listinfo/ntop-misc >> _______________________________________________ >> Ntop-misc mailing list >> [email protected] >> http://listgateway.unipi.it/mailman/listinfo/ntop-misc > > _______________________________________________ > Ntop-misc mailing list > [email protected] > http://listgateway.unipi.it/mailman/listinfo/ntop-misc _______________________________________________ Ntop-misc mailing list [email protected] http://listgateway.unipi.it/mailman/listinfo/ntop-misc
