I have my vps on CentOS running some my own software wich uses very fast algorithm of sending specially constructed RAW TCP packets to numerous systems running my software. I have noticed too many packet drops in TX column while doing ifconfig. Also i know at 70% not all the packets going through external venet0 interface are really sent by higher-level system (like host os, their network driver or so). How to investigate where is the real problem? For the first: how explain simple TX packet drop when send() or sendto() returns success? Two: will incoming ICMP desination unreachable/no route increase TX's packet drops?
My problem ifconfig:
venet0 Link encap:UNSPEC HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00 inet addr:127.0.0.1 P-t-P:127.0.0.1 Bcast:0.0.0.0 Mask:255.255.255.255 UP BROADCAST POINTOPOINT RUNNING NOARP MTU:1500 Metric:1 RX packets:14512501 errors:0 dropped:0 overruns:0 frame:0 TX packets:151202339 errors:0 dropped:10321888 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:1043659479 (995.3 MiB) TX bytes:6306749886 (5.8 GiB)
Sorry if there is too many material in the web about this, but they are for newbies, i am programmer and need all the details to fix my system. Thank you