srcu32 ÄÁÆ®·Ñ·¯ÀÇ Ä³½³Á¤Ã¥ Âü°í ÀÚ·á.

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¾È³çÇϼ¼¿ä ¹«´À¹ÌÀÔ´Ï´Ù.
¹Ù·Î º»·ÐÀ¸·Î µé¾î°©´Ï´Ù.

srcu32ÀÇ Ä³½Ì
srcu32¿¡´Â µÎ°¡Áö ij½³ Á¤Ã¥ÀÌ ÀÖ½À´Ï´Ù.

*write back ij½³À» »ç¿ëÇÒ¶§´Â ÄÄÇ»ÅÍ ½Ã½ºÅÛÀÇ Á¤ÀüÀÌ ÀÖÀ» °æ¿ì, ÄÁÆ®·Ñ·¯ÀÇ ¸Þ¸ð¸®¿¡ ÀÖ´Â Å×ÀÌÅÍ´Â º¸È£¹ÞÁö ¸øÇÕ´Ï´Ù.
±×·¯¹Ç·Î ÄÁÆ®·Ñ·¯´Â BBU(¹èÅ͸® ¹é¾÷ À¯´Ö)¶ó´Â °ÍÀ» Áö¿øÇÕ´Ï´Ù.

¾î´À ºÐ²²¼­ scur32ÀÇ Ä³½³Á¤Ã¥¿¡ ¹°¾î º¸¼Å¼­
ÀÌÀü¿¡ ¿Ã·È´ø srcu42eÀÇ Ä³½³Á¤Ã¥À» ¿Ã¸° ±â¾ïÀÌ À־ À̳à¼Æ¿ëµµ ¿Ã·Á º¾´Ï´Ù.

¿ì¼± ÄÁÆ®·Ñ·¯ ·¹º§ ij½³ ¼±ÅÃÀÌ ÀÖ½À´Ï´Ù.
1. ij½³ on/off ¼±ÅÃ(read ahead)
2. µô·¹ÀÌ write on/off ¼±ÅÃ(write back)  
(2¹øÀº Á¤Àü½Ã µ¥ÀÌÅͺ¸È£¸¦ ¹ÞÀ¸·Á¸é BBU°¡ ÀÖ¾î¾ß ÇÕ´Ï´Ù.)

µÎ¹ø°·Î ¹°¸® µð½ºÅ© ij½³ ¼±ÅÃÀÌ ÀÖ½À´Ï´Ù.
1. Àбâ ij½¬ on/off ¼±ÅÃ
2. ¾²±â ij½¬ on/off ¼±ÅÃ


À§ÀÇ Ä³½³ ¼³Á¤Àº Á¶ÇÕÇÒ¼ö ÀÖ´Â ¹æ¹ýÀÌ ¸¹À¸¹Ç·Î, ¸¹Àº ¼öÀÇ Ä³½¬ Á¤Ã¥ÀÌ »ý¼ºµË´Ï´Ù.

1.   write_ read_    | cache_ delayed write*_  | no cache

2.   write_ read*    | cache_ delayed wrtie*_  | disk read

3.   write* read_    | cache_ delayed wrtie*_  | disk write

4.   write* read*    | cache_ delayed write*_  | disk read write

5.   write_ read_    | cache* delayed write_    | controller read

6.   write_ read*    | cache* delayed write_    | disk read, controller read

7.   write* read_    | cache* delayed wrtie_    | disk write, controller read

8.   write* read*    | cache* delayed wrtie_    | disk read write, controller read

9.   write_ read_    | cache* delayed wrtie*    | controller read write

10. write_ read*    | cache* delayed write*    | disk read controller read write

11. write* read_    | cache* delayed write*    | disk write, Controller read write

12. write* read*    | cache* delayed write*    | disk read write, controller read write

¿©±â¿¡¼­ ¼ø¼­´Â "µð½ºÅ©¼³Á¤" | "ÄÁÆ®·Ñ·¯¼³Á¤" | "¼³Á¤µÈij½¬Á¤Ã¥" ÀÌ µË´Ï´Ù.
¶ÇÇÑ _´Â ¹ÌÁö¿ø À̳ª disable, * ´Â Áö¿ø ¹× enable ÀÔ´Ï´Ù. *_´Â disableÀ̰ųª, enableÀ̰ųª ÀÔ´Ï´Ù.

¿©±â¿¡¼­ ÀÚ½ÅÀÌ ¼³Á¤ÇÑ Å¸ÀÔÀ» º¸°í,
ij½³ Á¤Ã¥À» ¼³Á¤Çߴµ¥, ÇöÀç ÀбⰡ ´À·Á Á³´ÂÁö, ¾²±â°¡ ´À·Á Á³´ÂÁö,
¶Ç´Â ¿øÇÏ´Â ´ë·Î ij½³ÀÌ ¼³Á¤µÇ¾ú´ÂÁö È®ÀÎÇØ º¼¼ö ÀÖ½À´Ï´Ù.

¾î´ÀºÐ²²¼­ Áú¹®ÇϽñ淡 ´äº¯Çϴµ¥ ¸¹Àº Ÿ¼ö¸¦ ¿ä±¸ÇÏ¿©,
Âü°í¶õ¿¡ Àû¾î º¾´Ï´Ù.

¿©±â¼­ BBU´Â ÄÁÆ®·Ñ·¯ ·¹º§ write ij½¬ µ¿ÀÛÁß Á¤Àü½Ã ÄÁÆ®·Ñ·¯ÀÇ ·¥¿¡ µé¾î°¡ ÀÖ´Â µ¥ÀÌÅÍÀÇ º¸È£¿ëÀ¸·Î
»ç¿ëµÇ´Â °ÍÀÌÁö, ¼Óµµ¿Í´Â ÀüÇô ¹«°üÇÕ´Ï´Ù.
ÄÁÆ®·Ñ·¯¿¡ ·¥ÀÌ ÀåÂøµÇ¾î ÀÖ´ÂÁö, ±×·¸Áö ¾ÊÀºÁö°¡ ¼º´É¿¡ ¿µÇâÀ» ¹ÌÄ¥°ÍÀ¸·Î ÆǴܵ˴ϴÙ.

À§ÀÇ Ä³½¬ Á¤Ã¥À» Àß »ìÆ캸¸é 12¹øÀÌ ¼³Á¤ÇÒ¼ö ÀÖ´Â ÃÖ°í ij½³Á¤Ã¥ÀÔ´Ï´Ù.(BBU¸¦ »ç¿ëÇØ¾ß ÇÔ.)





 





ªÀº±Û Àϼö·Ï ½ÅÁßÇÏ°Ô.


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