Nios® V/II Embedded Design Suite (EDS)
Support for Embedded Development Tools, Processors (SoCs and Nios® V/II processor), Embedded Development Suites (EDSs), Boot and Configuration, Operating Systems, C and C++
12603 Discussions

Timing measurement

Altera_Forum
Honored Contributor II
‎01-25-2014 08:18 AM
1,029 Views

Hi, 

Please i try to measure timing of block on the Nios through alt_timestampe() function.  

It work fine :), but my probleme why when i measure a block that's contain for example 10 instruction (10 clock cycle) i get a big time.  

For example my frequency is 50 Mhz (0.02 micro-second), when i measure a timing of 10 addition, i should get 0.2 micro second but i find a timing 3 melli-second. 

Please help me, and if there are a method to compute number of clock cycle or number of instruction. 

 

Thank you
0 Kudos

Link Copied

1 Reply
Altera_Forum
Honored Contributor II
‎01-25-2014 11:12 PM
337 Views

The difference between your expected/actual results could be lots of things (interrupts, memory access, etc.) 

 

See this appnote for a good introduction to some of the techniques. 

http://www.altera.com/literature/an/an391.pdf 

 

And you can also use the NIOS signaltap plugin. 

http://www.altera.com/literature/an/an446.pdf
0 Kudos
Copy link
Reply

Community support is provided during standard business hours (Monday to Friday 7AM - 5PM PST). Other contact methods are available here.

Intel does not verify all solutions, including but not limited to any file transfers that may appear in this community. Accordingly, Intel disclaims all express and implied warranties, including without limitation, the implied warranties of merchantability, fitness for a particular purpose, and non-infringement, as well as any warranty arising from course of performance, course of dealing, or usage in trade.

For more complete information about compiler optimizations, see our Optimization Notice.