How are you testing? Single flow or multiple flows?
On Sat, Feb 2, 2013 at 6:33 AM, Tassos Chatzithomaoglou < [email protected]> wrote: > > I have the following setup on a ASR1006 (RP2/ESP40/SIP40) and i'm trying > to find out if > the following behavior is expected. > > > +-----+ > Te1/0/0 (4G/1G) ---| |---Te1/1/0 (2G/8G) > | | > Te1/2/0 (4G/1G) ---| | > +-----+ > > > When the output of Te1/1/0 goes above 8G, RTT for packets flowing from > Te1/0/0 to Te1/2/0 > increases by 50-100ms. > > The same happens in the following scenario on another ASR1006 > (RP2/ESP20/SIP10); when the > output of Te1/1/0 goes above 6G, RTT for packets flowing from Te1/0/0to > router's loopback > increases by 50-100ms (RP is at ~30% all the time). > > +-----+ > Te1/0/0 (6G/1G) ---| |---Te1/1/0 (1G/6G) > | | > | | > +-----+ > > > Most of the times, RTT increase is followed by packet loss > > This reminds me of HOL blocking, but i had the impression this was > applicable mostly to > switches with small buffers. > At the same time, the ESP sends thousands of flow control signals to the > SIP that it can't > cope with this traffic rate. > > ASR1006#show platform hardware slot 1 serdes statistics > From Slot F0-Link A > Pkts High: 1687702827 Low: 391241384970 Bad: 0 Dropped: 0 > Bytes High: 326483900940 Low: 291059939598187 Bad: 0 Dropped: 0 > Pkts Looped: 0 Error: 0 > Bytes Looped 0 > Qstat count: 0 Flow ctrl count: 40306518521 <=== > > From Slot F1-Link A > Pkts High: 0 Low: 0 Bad: 0 Dropped: 0 > Bytes High: 0 Low: 0 Bad: 0 Dropped: 0 > Pkts Looped: 0 Error: 0 > Bytes Looped 0 > Qstat count: 0 Flow ctrl count: 80093 > > -after 1 sec- > > ASR1006#show platform hardware slot 1 serdes statistics > From Slot F0-Link A > Pkts High: 1687721691 Low: 391244370772 Bad: 0 Dropped: 0 > Bytes High: 326487553571 Low: 291062458884384 Bad: 0 Dropped: 0 > Pkts Looped: 0 Error: 0 > Bytes Looped 0 > Qstat count: 0 Flow ctrl count: 40307432319 <=== > > From Slot F1-Link A > Pkts High: 0 Low: 0 Bad: 0 Dropped: 0 > Bytes High: 0 Low: 0 Bad: 0 Dropped: 0 > Pkts Looped: 0 Error: 0 > Bytes Looped 0 > Qstat count: 0 Flow ctrl count: 80094 > > > > ASR1006#show platform hardware slot 1 plim status internal > FCM Status > XON/XOFF 0x0000000000000003 > ECC Status > Data Path Config > MaxBurst1 256, MaxBurst2 128, DataMaxT 32768 > Cal Length RX 0x0002, TX 0x0002 > Repetitions RX 0x0010, TX 0x0010 > Data Path Status > RX in sync, TX in sync > Spi4 Channel 0, Rx Channel Status Full, Tx Channel Status Hungry > <=== > Spi4 Channel 1, Rx Channel Status Starving, Tx Channel Status Starving > RX Pkts 391387121421 Bytes 285048619167994 > TX Pkts 393073127218 Bytes 291507927293959 > Hypertransport Status > RX Pkts 0 Bytes 0 > TX Pkts 0 Bytes 0 > > > > TAC is talking about microbursts (how unusual), and although i can't > measure 10G traffic > per ms, QFP's 5-sec data doesn't agree with them. > > ASR1006#show platform hardware qfp active data utilization > CPP 0: Subdev 0 5 secs 1 min 5 min 60 min > Input: Priority (pps) 884 840 838 835 > (bps) 783344 750704 746360 725664 > Non-Priority (pps) 1291098 1282015 1261073 1265900 > (bps) 7544814904 7465944936 7322679592 7345058240 > Total (pps) 1291982 1282855 1261911 1266735 > (bps) 7545598248 7466695640 7323425952 7345783904 > Output: Priority (pps) 9065 9191 9184 8897 > (bps) 11485520 11659776 11730880 11357888 > Non-Priority (pps) 1281141 1271903 1251199 1256512 > (bps) 7560289312 7481701984 7338684976 7360568224 > Total (pps) 1290206 1281094 1260383 1265409 > (bps) 7571774832 7493361760 7350415856 7371926112 > Processing: Load (pct) 59 59 59 59 > > > > At the same time different IOS releases give different results (15.2(4)S2 > is far worsethan > 15.1(3)S2) and i'm starting to believe that ASR1006 is another hype > scheduled to go down... > > > > > -- > Tassos > > _______________________________________________ > cisco-nsp mailing list [email protected] > https://puck.nether.net/mailman/listinfo/cisco-nsp > archive at http://puck.nether.net/pipermail/cisco-nsp/ > _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
