[B! kernel] InoHiroã®ãƒ–ãƒƒã‚¯ãƒžãƒ¼ã‚¯

InoHiro id:InoHiro

kernelã«é–¢ã™ã‚‹InoHiroã®ãƒ–ãƒƒã‚¯ãƒžãƒ¼ã‚¯ (10)

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ç„¡è¦–ã§ããªã„ãƒ•ãƒ©ã‚°ãƒ¡ãƒ³ãƒ†ãƒ¼ã‚·ãƒ§ãƒ³å•é¡Œã¸ã®è§£ç”ã¯ï¼Ÿï¼ˆ1/2ï¼‰ ï¼ ï¼ IT
1æœˆç‰ˆã€€ç„¡è¦–ã§ããªã„ãƒ•ãƒ©ã‚°ãƒ¡ãƒ³ãƒ†ãƒ¼ã‚·ãƒ§ãƒ³å•é¡Œã¸ã®è§£ç”ã¯ï¼Ÿ å°å´Žè³‡åºƒ 2010/2/10 å½“åˆã€ä»Šå›žã¯memory compactionã¨transparent hugepageã¨ã„ã†2ã¤ã®ãƒˆãƒ”ãƒƒã‚¯ã‚’å–ã‚Šä¸Šã’ã€ŒHugepageå¤§ç‰¹é›†ã€ã«ã—ã‚ˆã†ã¨æ€ã£ã¦ã„ãŸã®ã§ã™ãŒã€ä¸¦åˆ—ãƒ—ãƒã‚°ãƒ©ãƒŸãƒ³ã‚°ã‚«ãƒ³ãƒ•ã‚¡ãƒ¬ãƒ³ã‚¹ã«è§¦ç™ºã•ã‚Œï¼ˆæ£ç¢ºã«ã¯ã€ãã®ã‚«ãƒ³ãƒ•ã‚¡ãƒ¬ãƒ³ã‚¹ã«å‚åŠ ã§ããªãã¦æ‚”ã—ã‹ã£ãŸã“ã¨ã«è§¦ç™ºã•ã‚Œï¼‰ã€å¾Œè€…ã‚’æ€¥ãã‚‡ã€ãƒãƒƒã‚¯ãƒ¬ã‚¹ãƒã‚¿ã«å·®ã—æ›¿ãˆã¦ç´¹ä»‹ã—ã¾ã™ã€‚ ã§ã‚‚ã“ã‚ŒãŒå¤§å¤±æ•—ã§ã€èª¿æŸ»ãŒå¤§å¤‰éŽãŽã¦æ³£ã‘ãŸã†ãˆã«ã€ã‚¹ã‚±ã‚¸ãƒ¥ãƒ¼ãƒ«ãŒã¨ã‚“ã§ã‚‚ãªã„ã“ã¨ã«ã€‚äººé–“ã€æ€ã„ä»˜ãã§è¡Œå‹•ã—ã¦ã¯ã„ã‘ãªã„ã¨ã„ã†ã„ã„è¦‹æœ¬ã§ã™ãã€‚ Melã®æ‚²é¡˜ãªã‚‹ã‹ï¼Ÿ Memory Compactionãƒãƒ£ãƒ¬ãƒ³ã‚¸ Mel Gormanã¯ã€Memory Compaction v1ãƒ‘ãƒƒãƒã‚·ãƒªãƒ¼ã‚ºã‚’æŠ•ç¨¿ã—ã¾ã—ãŸã€‚ã“ã‚Œã¯ã€ŒLinuxãƒ¡ãƒ¢ãƒªç®¡ç†ã®æœ€å…ˆç«¯ã‚’æŽ¢ã‚‹ã€ã§èª¬æ˜Žã—ãŸAnti
InoHiro 2010/03/12
memory_management

linux

kernel
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Charming Python: Functional programming in Python, Part 3
IBM Developer is your one-stop location for getting hands-on training and learning in-demand skills on relevant techno logies such as generative AI, data science, AI, and open source.
InoHiro 2010/03/03
linux

os

kernel
ãƒªãƒ³ã‚¯
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ã“ã®è¨˜äº‹ã¯ Max Brunning æ°ã®ç™ºè¡¨ã—ãŸ Solaris, BSDï¼ŒLinux ã«å¯¾ã™ã‚‹è¦‹è§£ã‹ã‚‰ç€æƒ³ã‚’å¾—ãŸã‚‚ã®ã§ã™ã€‚Unix ç³»ã‚·ã‚¹ãƒ†ãƒ åŒå£«ã®é•·æ‰€ã¨çŸæ‰€ã‚’æ¯”è¼ƒã™ã‚‹ï¼Œã¨ã„ã†ã®ã¯ã‚ˆãè¦‹ã‚‹è©±é¡Œã§ã™ãŒï¼Œä»Šå›žã®è¨˜äº‹ã§å–ã‚Šä¸Šã’ã‚‹ã®ã¯æœ€æ–°ã®ï¼“ã¤ã®ã‚ªãƒšãƒ¬ãƒ¼ãƒ†ã‚£ãƒ³ã‚°ã‚·ã‚¹ãƒ†ãƒ ã®ã‚«ãƒ¼ãƒãƒ«ã‚µãƒ–ã‚·ã‚¹ãƒ†ãƒ â€“ OpenSolarisï¼ŒWindows Vistaï¼Œãã—ã¦ Linux Kernel 2.6 ã§ã™ã€‚ãã®ç†ç”±ã¯ç°¡å˜ã§ï¼Œã“ã®ï¼“ã¤ãŒãƒ“ã‚¸ãƒã‚¹ç’°å¢ƒã¨é–‹ç™ºã‚³ãƒŸãƒ¥ãƒ‹ãƒ†ã‚£ã®ä¸¡æ–¹ã«ãŠã„ã¦æœ€ã‚‚åºƒãåˆ©ç”¨ã•ã‚Œã¦ã„ã¦ï¼ŒãªãŠã‹ã¤è©•ä¾¡ã®é«˜ã„ã‚ªãƒšãƒ¬ãƒ¼ãƒ†ã‚£ãƒ³ã‚°ã‚·ã‚¹ãƒ†ãƒ ã§ã‚ã‚‹ã‹ã‚‰ã§ã™ã€‚ ã‚·ã‚¹ãƒ†ãƒ è©•ä¾¡ã®åŸºæº–ã¯æ•°å¤šãã‚ã‚Šã¾ã™ãŒï¼Œã‚³ãƒ³ãƒ”ãƒ¥ãƒ¼ã‚¿ç§‘å¦ã«ãŠã„ã¦ï¼Œã‚ªãƒšãƒ¬ãƒ¼ãƒ†ã‚£ãƒ³ã‚°ã‚·ã‚¹ãƒ†ãƒ ã®åŸºæœ¬çš„ãªå½¹å‰²ãŒä¸å¤‰ã§ã‚ã‚‹ã“ã¨ã¯ç–‘ã†ä½™åœ°ãŒã‚ã‚Šã¾ã›ã‚“ã€‚ã‚ªãƒšãƒ¬ãƒ¼ãƒ†ã‚£ãƒ³ã‚°ã‚·ã‚¹ãƒ†ãƒ ã®ç›®çš„ã¯æ¬¡ã®ï¼“ã¤ã¨è€ƒãˆã¦ã‚ˆã„ã§ã—ã‚‡ã†ã€‚ åŠ¹çŽ‡æ€§: ã‚·ã‚¹ãƒ†ãƒ ãƒªã‚½ãƒ¼ã‚¹ï¼ˆç‰¹ã«ãƒãƒ¼ãƒ‰ã‚¦ã‚§ã‚¢
InoHiro 2010/03/03
os

kernel
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IBM Developer
IBM Developer is your one-stop location for getting hands-on training and learning in-demand skills on relevant techno logies such as generative AI, data science, AI, and open source.
InoHiro 2010/03/02
linux

kernel

gcc
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ãƒšãƒ¼ã‚¸ãƒ†ãƒ¼ãƒ–ãƒ« - Wikipedia
ãƒšãƒ¼ã‚¸ãƒ†ãƒ¼ãƒ–ãƒ«(page table)ã¨ã¯ã€ã‚³ãƒ³ãƒ”ãƒ¥ãƒ¼ã‚¿ã®ã‚ªãƒšãƒ¬ãƒ¼ãƒ†ã‚£ãƒ³ã‚°ã‚·ã‚¹ãƒ†ãƒ ã®ä¸ã®ä»®æƒ³è¨˜æ†¶(virtual memory)ã‚·ã‚¹ãƒ†ãƒ ã§ä»®æƒ³ã‚¢ãƒ‰ãƒ¬ã‚¹ã¨ç‰©ç†ã‚¢ãƒ‰ãƒ¬ã‚¹ã‚’å¯¾å¿œä»˜ã‘ã‚‹ãŸã‚ã«ä½¿ã‚ã‚Œã‚‹ãƒ‡ãƒ¼ã‚¿æ§‹é€ ã§ã‚ã‚‹ã€‚ä»®æƒ³ã‚¢ãƒ‰ãƒ¬ã‚¹ã¯ãã‚Œã«ã‚¢ã‚¯ã‚»ã‚¹ã™ã‚‹ãƒ—ãƒã‚»ã‚¹ã«ã‚ˆã£ã¦å®Ÿè¡Œã•ã‚Œã‚‹ãƒ—ãƒã‚°ãƒ©ãƒ ã«ã‚ˆã£ã¦ä½¿ã‚ã‚Œã€å®Ÿéš›ã«ã¯ç‰©ç†ã‚¢ãƒ‰ãƒ¬ã‚¹ã¯RAMã‚µãƒ–ã‚·ã‚¹ãƒ†ãƒ ç‰ã®ãƒãƒ¼ãƒ‰ã‚¦ã‚§ã‚¢ã«ã‚ˆã£ã¦ä½¿ã‚ã‚Œã‚‹ã€‚ ä»®æƒ³è¨˜æ†¶ã‚’ä½¿ã†ã‚ªãƒšãƒ¬ãƒ¼ãƒ†ã‚£ãƒ³ã‚°ã‚·ã‚¹ãƒ†ãƒ ã§ã¯ã€ã™ã¹ã¦ã®ãƒ—ãƒã‚»ã‚¹ã¯å¤§ããã¦ä¸€ç¶šãã®ãƒ¡ãƒ¢ãƒªé ˜åŸŸã§å‹•ã„ã¦ã„ã‚‹ã¨éŒ¯è¦šã•ã›ã‚‰ã‚Œã¦ã„ã‚‹ã€‚ç‰©ç†çš„ã«ã¯ã€ãã‚Œãžã‚Œã®ãƒ—ãƒã‚»ã‚¹ã®ãƒ¡ãƒ¢ãƒªã¯ç‰©ç†ãƒ¡ãƒ¢ãƒªã®è‰²ã€…ãªé ˜åŸŸã«æ•£ã‚‰ã°ã£ã¦ã„ã‚‹ã‹ã€ãƒãƒ¼ãƒ‰ãƒ‡ã‚£ã‚¹ã‚¯ç‰ã®ä»–ã®ã‚¹ãƒˆãƒ¬ãƒ¼ã‚¸ã«ç§»ã•ã‚Œã¦ã„ã‚‹(ãƒšãƒ¼ã‚¸ã‚¢ã‚¦ãƒˆ)ã€‚ ãƒ—ãƒã‚»ã‚¹ãŒè‡ªèº«ã®ãƒ¡ãƒ¢ãƒªã«ã‚¢ã‚¯ã‚»ã‚¹ã‚’è¦æ±‚ã—ãŸã¨ãã€ã‚ªãƒšãƒ¬ãƒ¼ãƒ†ã‚£ãƒ³ã‚°ã‚·ã‚¹ãƒ†ãƒ ã«ã¯ã€ãƒ—ãƒã‚»ã‚¹ãŒè¦æ±‚ã—ã¦ããŸä»®æƒ³ã‚¢ãƒ‰ãƒ¬ã‚¹ã‚’ãƒ‡ãƒ¼ã‚¿ãŒä¿æŒã•ã‚Œã¦ã„ã‚‹å®Ÿéš›ã®ãƒ¡ãƒ¢ãƒªã®ç‰©ç†ã‚¢ãƒ‰ãƒ¬ã‚¹
InoHiro 2010/03/02
os

kernel
ãƒªãƒ³ã‚¯
IBM Developer
IBM Developer is your one-stop location for getting hands-on training and learning in-demand skills on relevant techno logies such as generative AI, data science, AI, and open source.
InoHiro 2010/03/02
kernel

linux
ãƒªãƒ³ã‚¯
Monotonic time in Mac OS X - Scottâ€™s Weblog
Turns out calculating elapsed times in Mac OS X is a pain. Why not just use gettimeofday(2)? If youâ€™re trying to calculate a time period between two events, you should be able to call gettimeofday(2) before and after, subtract the results, and youâ€™d have an elapsed time, right? Well, almost â€“ but gettimeofday(2) is based on the â€œwall clockâ€, so if the time changes between calls to gettimeofday(2)
InoHiro 2010/03/02
kernel
ãƒªãƒ³ã‚¯
Voxã¯å®Œå…¨ç„¡æ–™ã€‚SNSã®æ©Ÿèƒ½ã‚‚å‚™ãˆãŸæ–°ã—ã„ãƒ–ãƒã‚°ã§ã™ã€‚
The election is here and the stakes are higher than ever. At Vox, we strive to bring clarity in uncertain times and help you understand what really matters. We know the impact of this election will be huge, and we believe you deserve to understand how the outcome will affect your life. We rely on readers like you to fund our journalism. Will you support our work and become a Vox Member today? Supp
InoHiro 2010/03/02
linux

kernel
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é«˜ç²¾åº¦ã‚«ãƒ¼ãƒãƒ«ã‚¿ã‚¤ãƒž hrtimer ã®ã‚³ãƒ¼ãƒ«ãƒãƒƒã‚¯ã®ä»•çµ„ã¿(é€”ä¸) - big-eyed-hamsterâ€™s diary
hrtimer ã¯ã€ tick ãƒ™ãƒ¼ã‚¹ã® timer_list ã‚’ç”¨ã„ãŸå¾“æ¥ã®ã‚«ãƒ¼ãƒãƒ«ã‚¿ã‚¤ãƒžã‚ˆã‚Šã‚‚ã€ã‚ˆã‚Šãã‚ç´°ã‚„ã‹ã«ã‚¿ã‚¤ãƒžç®¡ç†ã‚’è¡Œã„ãŸã„ã€ã¨ã„ã†ãƒ‹ãƒ¼ã‚ºã«åˆã‚ã›ã¦å®Ÿè£…ã•ã‚Œã¾ã—ãŸ*1. ã‚«ãƒ¼ãƒãƒ«ã‚¿ã‚¤ãƒžã¯ã‚¿ã‚¤ãƒžå‰²ã‚Šè¾¼ã¿ã®ã‚«ã‚¦ãƒ³ã‚¿ jiffies ãŒæŒ‡å®šã—ãŸå€¤ã«ãªã‚‹ã¨èµ·å‹•ã—ã¾ã™ãŒã€hrtimerã§ã¯ ktime_t ã¨ã„ã†å˜ä½ã‚’ä½¿ã£ã¦ã‚³ãƒ¼ãƒ«ãƒãƒƒã‚¯ãŒç™ºç”Ÿã™ã‚‹æ™‚é–“ã‚’æŒ‡å®šã—ã¾ã™. hrtimerã‚’ä½¿ã†ãŸã‚ã® api ã®ä¸€è¦§ã¯ä»¥ä¸‹ã®é€šã‚Šã§ã™: hrtimer_init hrtimer æ§‹é€ ä½“ã®åˆæœŸåŒ–ã‚’è¡Œã†. hrtimer_start é«˜ç²¾åº¦ã‚«ãƒ¼ãƒãƒ«ã‚¿ã‚¤ãƒžã®é–‹å§‹. hrtimer_try_to_cancel é«˜ç²¾åº¦ã‚«ãƒ¼ãƒãƒ«ã‚¿ã‚¤ãƒžã®ã‚ãƒ£ãƒ³ã‚»ãƒ«ã‚’è©¦ã¿ã‚‹. ã‚³ãƒ¼ãƒ«ãƒãƒƒã‚¯å‡¦ç†ãŒå®Ÿè¡Œä¸ã ã£ãŸã‚‰ã€ã‚ãã‚‰ã‚ã‚‹. hrtimer_cancel é«˜ç²¾åº¦ã‚«ãƒ¼ãƒãƒ«ã‚¿ã‚¤ãƒžã®ã‚ãƒ£ãƒ³ã‚»ãƒ«. æˆåŠŸã™ã‚‹ã¾ã§ hrtimer_try_to
InoHiro 2010/03/02
kernel
ãƒªãƒ³ã‚¯
ã‚µãƒ¼ãƒ“ã‚¹çµ‚äº†ã®ãŠçŸ¥ã‚‰ã›
ã‚µãƒ¼ãƒ“ã‚¹çµ‚äº†ã®ãŠçŸ¥ã‚‰ã› ã„ã¤ã‚‚Yahoo! JAPANã®ã‚µãƒ¼ãƒ“ã‚¹ã‚’ã”åˆ©ç”¨ã„ãŸã ãèª ã«ã‚ã‚ŠãŒã¨ã†ã”ã–ã„ã¾ã™ã€‚ ãŠå®¢æ§˜ãŒã‚¢ã‚¯ã‚»ã‚¹ã•ã‚ŒãŸã‚µãƒ¼ãƒ“ã‚¹ã¯æœ¬æ—¥ã¾ã§ã«ã‚µãƒ¼ãƒ“ã‚¹ã‚’çµ‚äº†ã„ãŸã—ã¾ã—ãŸã€‚ ä»Šå¾Œã¨ã‚‚Yahoo! JAPANã®ã‚µãƒ¼ãƒ“ã‚¹ã‚’ã”æ„›é¡§ãã ã•ã„ã¾ã™ã‚ˆã†ã€ã‚ˆã‚ã—ããŠé¡˜ã„ã„ãŸã—ã¾ã™ã€‚
InoHiro 2010/03/02
linux

kernel
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