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</o:shapelayout></xml><![endif]--></head><body lang=FR link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-family:"Arial","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-family:"Arial","sans-serif";color:#1F497D'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";mso-fareast-language:FR'>De :</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif";mso-fareast-language:FR'> BRIARD Sebastien <br><b>Envoyé :</b> mardi 27 mars 2018 11:42<br><b>À :</b> 'users@rtems.org'<br><b>Objet :</b> Interrupt latency in RTEMS (Zedboard)<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span style='font-family:"Arial","sans-serif"'>Hi,<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Arial","sans-serif"'><o:p> </o:p></span></p><p class=MsoNormal style='margin-bottom:12.0pt'><span lang=EN-US style='font-family:"Arial","sans-serif"'>I was trying to measure the interrupt latency in RTEMS with a Xilinx Zynq Zedboard (cortex A9).<br>I modified the c file in classic_signal example to measure time in the main loop and right after entering the handler. <br>That might seem artificial but well, it gives me a value with a relatively simple code.<br><br>I used this code for 100, 10000, and one million ticks per second. I am trying to understand how the measure can quite equal with 100 ticks per second and a million.<br>(I obtained values between 500ns and 1000ns).<br>Is there another timer that is used for interrupt processing ?<br><br>A subsequent question, is it possible to use a larger value than a tick per microsecond ? Maybe I am confusing a little between frequency and tick clock in RTEMS but I would like to run test with more or less a tick per nanosecond.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-family:"Arial","sans-serif"'>Thank you,<br>Sébastien.<o:p></o:p></span></p></div></body></html>