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AMD ¶óÀÌÁ¨, ÀÎÅÚ CPU¼­ ¹ß°ßµÈ MDS Ãë¾àÁ¡ Áß Æú¾Æ¿ô°ú RIDL ¹®Á¦¾ø´Ù

2019-05-16 09:47
ÀÌ»óÈ£ ±âÀÚ ghostlee@bodnara.co.kr

ÀÎÅÚ 2009³â ÀÌÈÄ 1¼¼´ë ÄÚ¾î ÇÁ·Î¼¼¼­ºÎÅÍ 8¼¼´ë Ä¿ÇÇ·¹ÀÌÅ©±îÁö¿¡ »õ·Î¿î »çÀ̵å ä³Î º¸¾È Ãë¾àÁ¡ÀÎ MDS°¡ ¹ß°ßµÈ °¡¿îµ¥, AMD¿¡¼­ ÀÌ¿Í °ü·ÃµÈ ÀÔÀåÀ» ³»³ù´Ù.

ÀÎÅÚ CPU¿¡¼­ ¹ß°ßµÈ MDS(Microarchitectural Data Sampling) º¸¾È Ãë¾àÁ¡Àº ÃÑ ³× °¡Áö·Î, °¢°¢ ZombieLoad, Fallout, RIDL(Rogue In-Flight Data Load), Store-to-Leak Forwarding·Î ºÒ¸®¸ç, ÀÎÅÚÀº ÇØ´ç Ãë¾àÁ¡ ´ëÀÀÀ» À§ÇÑ ¸¶ÀÌÅ©·ÎÄÚµå ¹èÆ÷¿Í ÇÔ²² »ç¿ë ȯ°æÀ» °í·ÁÇÑ ÇÏÀÌÆÛ½º·¹µù ºñȰ¼ºÈ­¸¦ ÁÖ¹®Çß´Ù.

ÀÌ¿¡ ÀÎÅÚ ÇÏÀÌÆÛ½º·¹µù°ú ºñ½ÁÇÑ SMT(Simultaneous Multi-Threading) ±â¼úÀ» °®Ãá AMD ¶óÀÌÁ¨ Ç÷§Æûµµ µ¿ÀÏÇÑ Ãë¾àÁ¡¿¡ ³ëÃâµÈ °ÍÀÌ ¾Æ´Ñ°¡ ÇÏ´Â ¿ì·Á°¡ ÀÖ¾ú´Âµ¥, AMD´Â °ø½Ä ÀÔÀå¹®À» ÅëÇØ ÀÚ»ç Á¦Ç°±º¿¡´Â MDS Áß Fallout°ú RIDL Ãë¾àÁ¡ ¹®Á¦°¡ ¾ø´Ù´Â ³»¿ëÀ» ¹àÇû´Ù.

´ÜÁö, ZobieLoad¿Í Store-to-Leak Forwarding¿¡ ´ëÇØ¼­´Â ÀÔÀåÀ» ¹àÈ÷Áö ¾Ê¾Ò´Ù. AMDÀÇ ÀÔÀå ¹ßÇ¥°¡ ÀÎÅÚÀÇ MDS ¹ßÇ¥¿Í °°Àº ÇöÁö½Ã°£ 5¿ù 14ÀÏ ÀÌ·ïÁø Á¡À» °¨¾ÈÇÏ¸é ³ª¸ÓÁö µÎ °³ÀÇ Ãë¾àÁ¡ °ü·Ã ³»¿ëÀÌ ¾ð±ÞµÇÁö ¾ÊÀº °ÍÀº ºÐ¼®¿¡ Á¶±Ý ´õ ½Ã°£ÀÌ °É¸®±â ¶§¹®À¸·Î ¿¹»óµÇ´Âµ¥, AMDÀÇ ºü¸¥ Ãß°¡ °ËÅä °á°ú ¹ßÇ¥¸¦ ±â´Ù¸°´Ù.

ÇÑÆí, ÀÎÅÚ ÄÚ¾î ÇÁ·Î¼¼¼­¿¡¼­ ¹ß°ßµÈ MDS Ãë¾àÁ¡Àº 8¼¼´ë ÄÚ¾î ÇÁ·Î¼¼¼­ Áß À§½ºÅ° ·¹ÀÌÅ© ½Ã¸®Áî¿Í 9¼¼´ë ÄÚ¾î ÇÁ·Î¼¼¼­(Ä¿ÇÇ·¹ÀÌÅ© ¸®ÇÁ·¹½Ã), 2¼¼´ë Á¦¿Â ½ºÄÉÀÏ·¯ºí ÇÁ·Î¼¼¼­¿¡¼­´Â Çϵå¿þ¾î ´ëÀÀÀÌ ¿Ï·áµÇ¾ú´Ù.

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