[dpdk-dev] cost of reading tsc register

2015-04-20 Thread Ravi Kumar Iyer
Hi, We were doing some code optimizations , running DPDK based applications, and chanced upon the rte_rdtsc function [ to read tsc timestamp register value ] consuming cpu cycles of the order of 100clock cycles with a delta of upto 40cycles at times [ 60-140 cycles] We are actually building up

[dpdk-dev] Queries related to Hyperthreading

2014-10-07 Thread Ravi Kumar Iyer
Babu [mailto:kannan.babu.ra...@intel.com] Sent: Tuesday, October 07, 2014 9:48 AM To: Ravi Kumar Iyer; dev at dpdk.org Subject: RE: Queries related to Hyperthreading Hi Ravi The Intel HT actually has its own resources except few places like execution units and other resources in the pipeline, hence ther

[dpdk-dev] Queries related to Hyperthreading

2014-10-07 Thread Ravi Kumar Iyer
hello Intel Gurus, I have some queries related to intel HT technology. I am running an intel dpdk application and trying to benchmark as well as optimize the same. As of now it is a single threaded application and would like to keep it like that for now. I am running it on an intel sandy bridg