{"action":"created","issue":{"url":"https://api.github.com/repos/xianyi/OpenBLAS/issues/1439","repository_url":"https://api.github.com/repos/xianyi/OpenBLAS","labels_url":"https://api.github.com/repos/xianyi/OpenBLAS/issues/1439/labels{/name}","comments_url":"https://api.github.com/repos/xianyi/OpenBLAS/issues/1439/comments","events_url":"https://api.github.com/repos/xianyi/OpenBLAS/issues/1439/events","html_url":"https://github.com/xianyi/OpenBLAS/issues/1439","id":292270239,"number":1439,"title":"openblas performance on 8xA53","user":{"login":"wl3b10s","id":26324988,"avatar_url":"https://avatars0.githubusercontent.com/u/26324988?v=4","gravatar_id":"","url":"https://api.github.com/users/wl3b10s","html_url":"https://github.com/wl3b10s","followers_url":"https://api.github.com/users/wl3b10s/followers","following_url":"https://api.github.com/users/wl3b10s/following{/other_user}","gists_url":"https://api.github.com/users/wl3b10s/gists{/gist_id}","starred_url":"https://api.github.com/users/wl3b10s/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/wl3b10s/subscriptions","organizations_url":"https://api.github.com/users/wl3b10s/orgs","repos_url":"https://api.github.com/users/wl3b10s/repos","events_url":"https://api.github.com/users/wl3b10s/events{/privacy}","received_events_url":"https://api.github.com/users/wl3b10s/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":6,"created_at":"2018-01-29T02:56:27Z","updated_at":"2018-02-02T08:28:15Z","closed_at":null,"author_association":"NONE","body":"test gemm on 8 core  A53.\r\nSetting \r\n omp_set_num_threads(4);\r\n openblas_set_num_threads(4);\r\nis much faster than:\r\n omp_set_num_threads(8);\r\n openblas_set_num_threads(8);\r\n\r\ni think this may because of multithread doesn't work well on more cores.\r\n\r\nmy build config : all default  and build native on arm a53 and ubuntu.\r\n\r\nmy test config : gemm  float, both no transpose\r\nM = 16, N = 76800, K = 98\r\nM = 32, N = 19481, K = 144\r\nM = 128, N = 1271, K = 1728\r\n"},"comment":{"url":"https://api.github.com/repos/xianyi/OpenBLAS/issues/comments/362518928","html_url":"https://github.com/xianyi/OpenBLAS/issues/1439#issuecomment-362518928","issue_url":"https://api.github.com/repos/xianyi/OpenBLAS/issues/1439","id":362518928,"user":{"login":"ashwinyes","id":13587804,"avatar_url":"https://avatars0.githubusercontent.com/u/13587804?v=4","gravatar_id":"","url":"https://api.github.com/users/ashwinyes","html_url":"https://github.com/ashwinyes","followers_url":"https://api.github.com/users/ashwinyes/followers","following_url":"https://api.github.com/users/ashwinyes/following{/other_user}","gists_url":"https://api.github.com/users/ashwinyes/gists{/gist_id}","starred_url":"https://api.github.com/users/ashwinyes/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/ashwinyes/subscriptions","organizations_url":"https://api.github.com/users/ashwinyes/orgs","repos_url":"https://api.github.com/users/ashwinyes/repos","events_url":"https://api.github.com/users/ashwinyes/events{/privacy}","received_events_url":"https://api.github.com/users/ashwinyes/received_events","type":"User","site_admin":false},"created_at":"2018-02-02T08:28:15Z","updated_at":"2018-02-02T08:28:15Z","author_association":"NONE","body":">>  Am I right in thinking that the hardfp/softfp issue that lead to a re-introduction of C kernels for ARM affects that 32bit platform only ?\r\n\r\nYes. hardfp/softfp issue is only for arm 32bit.\r\n\r\n>> The quick and dirty alternative would be to treat A53 and A72 as A57 in cpuid_arm64.\r\n\r\nMaking ARMV8 target to use the assembly kernels is the best thing to do in my opinion."}}
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