<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><div dir="auto" style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><div dir="auto" style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><div dir="auto" style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">So some questions:<div class=""><br class=""></div><div class="">What hardware is this? Are they 16 “real” cores or hyper threaded cores?</div><div class="">Do you have a test case setup so you can readily measure the impact of change?</div><div class="">Many tunings that involve numa will only show substantial results ion specific app</div><div class="">What does <i class="">cat /proc/cpuinfo | tail -28</i> return?</div><div class="">When you say maxed out do you literally mean that cores 6,7 show 100% CPU utilization<br class=""><div><br class=""><blockquote type="cite" class=""><div class="">On Jan 12, 2018, at 9:21 AM, Raffael Vogler <<a href="mailto:raffael.vogler@yieldlove.com" class="">raffael.vogler@yieldlove.com</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div dir="ltr" class=""><div class="">I have 16 cores (0 to 15) and the most active processes are:<br class=""><br class="">- nginx<br class="">- php-fpm<br class="">- eth0-TxRx-0 (paired Tx and Rx queues #1)<br class="">- eth0-TxRx-1 (paired Tx and Rx queues #2)<br class=""><br class="">eth0-TxRx-0 is already dedicated to core #5 and eth0-TxRx-1 to core #6.<br class=""><br class="">But on those two cores are also nginx and php-fpm processes being executed.<br class=""><br class="">Now I would like o restrict nginx and php-fpm to cores 0-4 and 7-15.<br class=""><br class="">I would like to confirm that this can be correctly achieved with:<br class=""><br class="">taskset -c 0-4,7-15 nginx<br class="">taskset -c 0-4,7-15 php-fpm<br class=""><br class="">Is that a safe and sound approach?<br class=""></div></div>
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