[ovs-discuss] Netperf generates warnings

Farrukh Aftab Khan Farrukh.Khan at xflowresearch.com
Wed Dec 19 12:17:53 UTC 2012


Hello,

I am using OVS-1.7.1 on embedded Linux (kernel-2.6.32.27). I am generating
traffic at high data rate using 'netperf' and I get the following warnings:

1970-01-01T00:18:54Z|00029|timeval|WARN|51 ms poll interval (0 ms user, 50
ms system) is over 29 times the weighted mean interval 2 ms (2424 samples)
1970-01-01T00:18:54Z|00030|timeval|WARN|context switches: 0 voluntary, 1
involuntary
1970-01-01T00:18:54Z|00031|coverage|INFO|Event coverage (epoch 2424/entire
run), hash=eb85f2f9:
1970-01-01T00:18:54Z|00032|coverage|INFO|ofproto_dpif_xlate           1
/      1259
1970-01-01T00:18:54Z|00033|coverage|INFO|hmap_expand                 22
/     22399
1970-01-01T00:18:54Z|00034|coverage|INFO|netdev_get_stats            12
/      2616
1970-01-01T00:18:54Z|00035|coverage|INFO|poll_fd_wait                41
/     98932
1970-01-01T00:18:54Z|00036|coverage|INFO|util_xalloc               1157
/    899297
1970-01-01T00:18:54Z|00037|coverage|INFO|netlink_received            17
/      8725
1970-01-01T00:18:54Z|00038|coverage|INFO|netlink_sent                17
/      8529
1970-01-01T00:18:54Z|00039|coverage|INFO|bridge_reconfigure           0
/        13
1970-01-01T00:18:54Z|00040|coverage|INFO|ofproto_flush                0
/         4
1970-01-01T00:18:54Z|00041|coverage|INFO|ofproto_update_port          0
/        32
1970-01-01T00:18:54Z|00042|coverage|INFO|dpif_port_add                0
/         8
1970-01-01T00:18:54Z|00043|coverage|INFO|dpif_flow_flush              0
/         8
1970-01-01T00:18:54Z|00044|coverage|INFO|dpif_purge                   0
/         4
1970-01-01T00:18:54Z|00045|coverage|INFO|flow_extract                 0
/        79
1970-01-01T00:18:54Z|00046|coverage|INFO|hmap_pathological            0
/         1
1970-01-01T00:18:54Z|00047|coverage|INFO|mac_learning_learned         0
/        14
1970-01-01T00:18:54Z|00048|coverage|INFO|mac_learning_expired         0
/        12
1970-01-01T00:18:54Z|00049|coverage|INFO|poll_zero_timeout            0
/        32
1970-01-01T00:18:54Z|00050|coverage|INFO|pstream_open                 0
/         9
1970-01-01T00:18:54Z|00051|coverage|INFO|stream_open                  0
/         1
1970-01-01T00:18:54Z|00052|coverage|INFO|netdev_set_policing          0
/        66
1970-01-01T00:18:54Z|00053|coverage|INFO|netdev_get_ifindex           0
/        10
1970-01-01T00:18:54Z|00054|coverage|INFO|netdev_get_hwaddr            0
/         9
1970-01-01T00:18:54Z|00055|coverage|INFO|netdev_set_hwaddr            0
/         5
1970-01-01T00:18:54Z|00056|coverage|INFO|netdev_ethtool               0
/        31
1970-01-01T00:18:54Z|00057|coverage|INFO|nln_changed                  0
/        64
1970-01-01T00:18:54Z|00058|coverage|INFO|52 events never hit

These warnings are only generated when traffic hits the bridge at a high
rate. Is it normal for OVS to show these warnings/information messages when
dealing with high data rate traffic? Is there a way to hide or minimize
them?

Regards.
-
Farrukh Aftab Khan
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