{"action":"opened","issue":{"url":"https://api.github.com/repos/makelinux/performance/issues/1","repository_url":"https://api.github.com/repos/makelinux/performance","labels_url":"https://api.github.com/repos/makelinux/performance/issues/1/labels{/name}","comments_url":"https://api.github.com/repos/makelinux/performance/issues/1/comments","events_url":"https://api.github.com/repos/makelinux/performance/issues/1/events","html_url":"https://github.com/makelinux/performance/issues/1","id":242372142,"number":1,"title":"Performance number difference with hdparm","user":{"login":"vadimp","id":657528,"avatar_url":"https://avatars0.githubusercontent.com/u/657528?v=3","gravatar_id":"","url":"https://api.github.com/users/vadimp","html_url":"https://github.com/vadimp","followers_url":"https://api.github.com/users/vadimp/followers","following_url":"https://api.github.com/users/vadimp/following{/other_user}","gists_url":"https://api.github.com/users/vadimp/gists{/gist_id}","starred_url":"https://api.github.com/users/vadimp/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/vadimp/subscriptions","organizations_url":"https://api.github.com/users/vadimp/orgs","repos_url":"https://api.github.com/users/vadimp/repos","events_url":"https://api.github.com/users/vadimp/events{/privacy}","received_events_url":"https://api.github.com/users/vadimp/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":0,"created_at":"2017-07-12T13:02:12Z","updated_at":"2017-07-12T13:02:12Z","closed_at":null,"body":"There is a 40% difference between hdparm and throughput utilities.\r\nDo we have a calculation issue?\r\n\r\nhdparm execution is close to 500MB/sec:\r\n```\r\nsudo hdparm  -t /dev/sda\r\n/dev/sda:\r\n Timing buffered disk reads: 1474 MB in  3.00 seconds = 490.80 MB/sec\r\n```\r\n\r\nthroughput execution moves around 300 MB/sec\r\n```\r\n$ ./throughput \r\ncur=330533 KB/s\r\ncur=322271 KB/s\r\nmean=326349 KB/s\r\nmean_stdev=1 %\r\ncur=334805 KB/s\r\nmean=329120 KB/s\r\nmean_stdev=1 %\r\ncur=317486 KB/s\r\nmean=326132 KB/s\r\nmean_stdev=1 %\r\ncur=325342 KB/s\r\nmean=325974 KB/s\r\nmean_stdev=1 %\r\ncur=298369 KB/s\r\nmean=321024 KB/s\r\nmean_stdev=2 %\r\ncur=319171 KB/s\r\nmean=320758 KB/s\r\nmean_stdev=1 %\r\ncur=281511 KB/s\r\nmean=315264 KB/s\r\nmean_stdev=2 %\r\ncur=303020 KB/s\r\nmean=313855 KB/s\r\nmean_stdev=2 %\r\ncur=328902 KB/s\r\nmean=315297 KB/s\r\nmean_stdev=2 %\r\nmean=315297 KB/s\r\nmean_stdev=2 %\r\n```"}}
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