Hello, We use rt patch with UBUNTU,and have a "high priority" thread with 1 millisecond periodic rate. That rt thread, also send UDP Ethernet packets. This project was ported from VXWORKS project, but we notice the following difference: Although the rt thread gets its 1 millisecond periodic in high accuracy, the udp is being send in chunks, as if several messages are aggregated before being delivered. Is there any reason for such behavior ? Regards, Ran -- To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html