{"action":"opened","issue":{"url":"https://api.github.com/repos/Fourdee/DietPi/issues/1962","repository_url":"https://api.github.com/repos/Fourdee/DietPi","labels_url":"https://api.github.com/repos/Fourdee/DietPi/issues/1962/labels{/name}","comments_url":"https://api.github.com/repos/Fourdee/DietPi/issues/1962/comments","events_url":"https://api.github.com/repos/Fourdee/DietPi/issues/1962/events","html_url":"https://github.com/Fourdee/DietPi/issues/1962","id":344547349,"node_id":"MDU6SXNzdWUzNDQ1NDczNDk=","number":1962,"title":"SMP affinity","user":{"login":"antonellocaroli","id":11161093,"node_id":"MDQ6VXNlcjExMTYxMDkz","avatar_url":"https://avatars1.githubusercontent.com/u/11161093?v=4","gravatar_id":"","url":"https://api.github.com/users/antonellocaroli","html_url":"https://github.com/antonellocaroli","followers_url":"https://api.github.com/users/antonellocaroli/followers","following_url":"https://api.github.com/users/antonellocaroli/following{/other_user}","gists_url":"https://api.github.com/users/antonellocaroli/gists{/gist_id}","starred_url":"https://api.github.com/users/antonellocaroli/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/antonellocaroli/subscriptions","organizations_url":"https://api.github.com/users/antonellocaroli/orgs","repos_url":"https://api.github.com/users/antonellocaroli/repos","events_url":"https://api.github.com/users/antonellocaroli/events{/privacy}","received_events_url":"https://api.github.com/users/antonellocaroli/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":0,"created_at":"2018-07-25T18:00:41Z","updated_at":"2018-07-25T18:00:41Z","closed_at":null,"author_association":"NONE","body":"I do not know if it's something that can interest.\r\nI use the system as a player/render audio.\r\nThen isolate CPU 3 at boot, adding isolcpus=3 to boot parameters\r\nI dedicate this cpu to the player through dietpi-process_tool.\r\n\r\nafter I move the system interrupts.\r\napparently both the sparky and the rpi3 use the cpu0 for system interrupts\r\n\r\n`cat /proc/interrupts`\r\n\r\n![selection_091](https://user-images.githubusercontent.com/11161093/43217931-443d8d4c-9043-11e8-999b-860d2a931726.png)\r\ncosi mi sposto il 56 e il 93 sulla cpu1 e il 32 sulla cpu2\r\n\r\n`echo \"2\" > /proc/irq/56/smp_affinity`\r\n`echo \"2\" > /proc/irq/93/smp_affinity`\r\n`echo \"4\" > /proc/irq/32/smp_affinity`\r\n\r\nhttps://cs.uwaterloo.ca/~brecht/servers/apic/SMP-affinity.txt\r\n\r\n![selection_093](https://user-images.githubusercontent.com/11161093/43218671-55625fd8-9045-11e8-92c7-1867d42063c7.png)\r\n\r\n\r\ntwd I do not know what it is (29), but that does not move.\r\nBut already so it seems more balanced.\r\n\r\nI do not know if this can be added to the DietPi scripts.\r\n"}}
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