{"type":"rich","image_url":null,"blog_url":"https://nopipi.hatenablog.com/","description":"\u30d5\u30a1\u30a4\u30eb\u30b7\u30b9\u30c6\u30e0\u4e0a\u306e\u30d5\u30a1\u30a4\u30eb\u306b\u30ad\u30e3\u30c3\u30b7\u30e5\u3092\u89e3\u3055\u305aread/write\u3059\u308b\u305f\u3081\u306b\u306f\u3001DirectIO\u3067\u64cd\u4f5c\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u3002DirectIO\u3092\u64cd\u4f5c\u3059\u308b\u306b\u306f\u3001 \u30d5\u30a1\u30a4\u30eb\u3092\u30aa\u30fc\u30d7\u30f3\u3059\u308b\u6642\u306b\u3001O_DIRECT\u30aa\u30d7\u30b7\u30e7\u30f3\u3092\u4ed8\u4e0e\u3059\u308b read/write\u3067\u64cd\u4f5c\u3059\u308b\u969b\u306e\u30d0\u30c3\u30d5\u30a1\u306f\u3001512KB(Linux kernel2.6\u4ee5\u964d)\u3067\u30a2\u30e9\u30a4\u30e1\u30f3\u30c8\u3059\u308b\uff08\u3057\u305f\u304c\u3063\u3066\u3001\u30d0\u30c3\u30d5\u30a1\u610f\u306fposix_memalign\u3067\u78ba\u4fdd\u3059\u308b\u3002malloc\u3084\u914d\u5217\u3067\u78ba\u4fdd\u3059\u308b\u3068read()/write()\u6642\u306b\u3001EINVAL\u30a8\u30e9\u30fc\u3068\u306a\u308b) \u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u306b\"_GNU_SOURCE\"\u30aa\u30d7\u30b7\u30e7\u30f3\u3092\u4ed8\u4e0e\u3059\u308b\u3002 \u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3002 #include\u2026","url":"https://nopipi.hatenablog.com/entry/2012/11/12/004704","categories":["C\u30d7\u30ed\u30b0\u30e9\u30e0","Linux"],"published":"2012-11-12 00:47:04","provider_name":"Hatena Blog","title":"\u30c0\u30a4\u30ec\u30af\u30c8IO\u306e\u5b9f\u88c5","width":"100%","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fnopipi.hatenablog.com%2Fentry%2F2012%2F11%2F12%2F004704\" title=\"\u30c0\u30a4\u30ec\u30af\u30c8IO\u306e\u5b9f\u88c5 - \u306e\u3074\u3074\u306e\u30e1\u30e2\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","blog_title":"\u306e\u3074\u3074\u306e\u30e1\u30e2","version":"1.0","author_url":"https://blog.hatena.ne.jp/nopipi/","height":"190","provider_url":"https://hatena.blog","author_name":"nopipi"}