-----Original Message----- From: kernelnewbies-bounce@xxxxxxxxxxxx [mailto:kernelnewbies-bounce@xxxxxxxxxxxx] On Behalf Of Tharindu Rukshan Bamunuarachchi Sent: Tuesday, June 16, 2009 10:13 PM To: kernelnewbies@xxxxxxxxxxxx Subject: Linux ksoftirq >hi All, > >recently we were developing high performance / low latency transaction processing system with >Linux. (i.e. SuSE 11 but 2.6.29 vanilla kernel) > >we tried to send high volume of traffic, typically 20K messages per second. each message is >about 400 bytes to 800 bytes. > >we saw ksoftirq thread is taking about 19 % CPU at 15K rate and at 20K rate it was about 100%. >so we could not pump messages more than 20K. > >do you guys have any idea about ksoftirq behaviour, why is it taking 100% CPU. > >we have tried both 1G NIC and 10G NIC. we saw high % for both NICs ? > Can you tell me the manufacture of NIC ? Do you use NAPI based drivers ? Can you send the rate of transfer in Mbps ? What kind of Packet-Generator you are using ? Regards, Madhukar. -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx Please read the FAQ at http://kernelnewbies.org/FAQ -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx Please read the FAQ at http://kernelnewbies.org/FAQ
