[B! systemtap] dannã®ãƒ–ãƒƒã‚¯ãƒžãƒ¼ã‚¯

dann id:dann

systemtapã«é–¢ã™ã‚‹dannã®ãƒ–ãƒƒã‚¯ãƒžãƒ¼ã‚¯ (13)

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OpenJDK/SystemTapã®ãƒ‡ãƒãƒƒã‚°ãŒæœ‰åŠ¹ãª5ã¤ã®äº‹ä¾‹
OpenJDK/SystemTapã®ãƒ‡ãƒãƒƒã‚°ãŒæœ‰åŠ¹ãª5ã¤ã®äº‹ä¾‹ï¼šJava on Linuxã‚’é¬¼å‡„ãƒã‚¤ãƒ†ã‚£ãƒ–ãƒ‡ãƒãƒƒã‚°ï¼ï¼ˆå¾Œç¯‡ï¼‰ï¼ˆ1/3 ãƒšãƒ¼ã‚¸ï¼‰ OpenJDKã¨SystemTapã¯å®Ÿæ¡ˆä»¶ã§å¤§æ´»èºï¼ å‰å›žã®ã€ŒOpenJDKï¼‹SystemTapã§ãƒˆãƒ©ãƒ–ãƒ«è§£æžã¯ã“ã“ã¾ã§ã§ãã‚‹ï¼ã€ã§ã¯OpenJDKã¨SystemTapã®æ¦‚è¦ã¨ã€ã“ã‚Œã‚‰ã®çµ„ã¿åˆã‚ã›ã§ã§ãã‚‹ã“ã¨ã‚’ç°¡å˜ãªã‚µãƒ³ãƒ—ãƒ«ã‚’äº¤ãˆãªãŒã‚‰èª¬æ˜Žã—ã¾ã—ãŸã€‚ä»Šå›žã¯å®Ÿæˆ¦ã§ä½¿ãˆã‚‹äº‹ä¾‹ã¨ã„ã†ã“ã¨ã§ã€ä»¥ä¸‹ã®5ã¤ã‚’å…·ä½“çš„ãªã‚¹ã‚¯ãƒªãƒ—ãƒˆã‚’å«ã‚ãªãŒã‚‰èª¬æ˜Žã—ã¾ã™ã€‚ã‚¹ã‚¯ãƒªãƒ—ãƒˆã‚„ã‚½ãƒ¼ã‚¹ã‚³ãƒ¼ãƒ‰ã¯ã“ã¡ã‚‰ã‹ã‚‰ãƒ€ã‚¦ãƒ³ãƒãƒ¼ãƒ‰ã§ãã¾ã™ã€‚ GCå‹•ä½œçŠ¶æ³ã®å–å¾— ç‰¹å®šãƒ¡ã‚½ãƒƒãƒ‰ã®ãƒ—ãƒãƒ•ã‚¡ã‚¤ãƒªãƒ³ã‚° ç‰¹å®šãƒ¡ã‚½ãƒƒãƒ‰å®Ÿè¡Œæ™‚ã®ã‚¹ã‚¿ãƒƒã‚¯ãƒˆãƒ¬ãƒ¼ã‚¹å–å¾— ã‚¨ãƒ³ãƒ‰ãƒã‚¤ãƒ³ãƒˆã¨ã®ã‚³ãƒã‚¯ã‚·ãƒ§ãƒ³ï¼ˆã‚½ã‚±ãƒƒãƒˆï¼‰ç¢ºèª ç«¶åˆã™ã‚‹ãƒ¢ãƒ‹ã‚¿ãƒ¼ã‚ªãƒ–ã‚¸ã‚§ã‚¯ãƒˆã®æŠŠæ¡ ãªãŠã€ä»Šå›žã®ã‚µãƒ³ãƒ—ãƒ«ã¯ã™ã¹ã¦ã€ä»¥ä¸‹ã®ç’°å¢ƒã§å‹•ä½œã‚’ç¢ºèªã—ã¦ã„ã¾ã™ã€‚ OSï¼šRed
dann 2011/11/13
systemtap

java
ãƒªãƒ³ã‚¯
glandium.org Â» Blog Archive Â» Attempting to track I/O with systemtap
There are several ways a program can hit the disk, and it can be hard to know exactly what's going on, especially when you want to take into account the kernel caches. This includes, but is not limited to: any access to a file, which may lead to I/O to read its parent directories if they are not already in the inode or dentry caches enumerating a directory with readdir(), which may lead to I/O on
dann 2011/08/06
systemtap
ãƒªãƒ³ã‚¯
Analyzing memory use with SystemTap
dann 2011/08/06
systemtap
ãƒªãƒ³ã‚¯
SSDã«å¯¾ã™ã‚‹Block Discard/TRIMã‚’SystemTapã§å¯è¦–åŒ–ã™ã‚‹ - SH2ã®æ—¥è¨˜
ãƒ‘ã‚½ã‚³ãƒ³ã‚’è²·ã„ã¾ã—ãŸã€‚ CPUï¼šIntel Core i5-2400S Motherboardï¼šASUS P8H67-M EVO Memoryï¼šPatriot PSD38G1333KH 4GBÃ—2 2å€‹ SSDï¼šIntel X25-M G2 120GB HDDï¼šHGST Deskstar 5K3000 2TB Power Supplyï¼šOwltech Xseries SS-650KM ä»Šå›žã¯OLIOSPECã•ã‚“ã®Micro Monster H67 Super Silentã‚’ã‚«ã‚¹ã‚¿ãƒžã‚¤ã‚ºã—ã¦æ³¨æ–‡ã—ã¾ã—ãŸã€‚ãƒ‡ã‚¹ã‚¯ãƒˆãƒƒãƒ—æ©Ÿã‚’ãƒªãƒ—ãƒ¬ã‚¤ã‚¹ã™ã‚‹ã®ã¯å®Ÿã«9å¹´ã¶ã‚Šãªã®ã§ã™ãŒã€æœ€è¿‘ã®ãƒ‘ã‚½ã‚³ãƒ³ã¯ã™ã”ãè‰¯ã„ã§ã™ãã€‚é€Ÿãã¦é™ã‹ã§ä½Žæ¶ˆè²»é›»åŠ›ã§ã™ã€‚æœ¬æ—¥ã¯ã“ã®ãƒ‘ã‚½ã‚³ãƒ³ã‚’ä½¿ã£ã¦ã€è¿‘å¹´ã®Linuxã«ãŠã‘ã‚‹SSDäº‹æƒ…ã‚’ç¢ºèªã—ã¦ã„ããŸã„ã¨æ€ã„ã¾ã™ã€‚ TRIMã¨ã¯ è¿‘é ƒã§ã¯å®šç•ªSSDã®åº§ã‚’ã™ã£ã‹ã‚ŠCrucial RealSSD
dann 2011/01/23
ssd

trim

systemtap

cool
ãƒªãƒ³ã‚¯
LW2008SystemTapTutorial - Systemtap Wiki
dann 2011/01/16
systemtap

cool
ãƒªãƒ³ã‚¯
VIMSyntaxHighlightingForSystemtap - Systemtap Wiki
dann 2011/01/16
systemtap

vim
ãƒªãƒ³ã‚¯
SystemTap - Wikinote
å‚è€ƒ URL SystemTap ã¨ã‚Šã‚ãˆãšå…¬å¼ãƒšãƒ¼ã‚¸ã® Documentation ã¨ Wiki ã‚’è¦‹ã‚Œã°äº‹è¶³ã‚Šã‚‹ã€‚ è¦šãˆæ›¸ã æ§‹é€ ä½“ã®ãƒ¡ãƒ³ãƒã¸ã®ã‚¢ã‚¯ã‚»ã‚¹ã¯ã€ãƒã‚¤ãƒ³ã‚¿ã§ã‚ã‚Œå®Ÿä½“ã§ã‚ã‚Œ -> ã‚’ä½¿ã† atomic_t ã¸ã®ã‚¢ã‚¯ã‚»ã‚¹ã¯ã€->counter ã‚’è¿½åŠ ã™ã‚Œã°å¯èƒ½ åŸºæœ¬å½¢ æ–‡æ³•ã¯ã€awk ã«ä¼¼ã¦ã„ã‚‹ã€‚begin/end ã¯ã‚ªãƒ—ã‚·ãƒ§ãƒ³ã€‚ è©³ç´°ã¯ man stap ã‚’å‚ç…§ã®ã“ã¨ã€‚ #!/usr/bin/stap -v function my_function:string(arg1:long, arg2) { return value } probe begin { ... } probe kernel.function("sys_*") { printf("%s[%d] calledÂ %s()\n", execname(), pid(), probefunc()) } probe en
dann 2011/01/16
systemtap

vim
ãƒªãƒ³ã‚¯
systemtapã‚’ä½¿ã£ãŸå‹•çš„è¿½è·¡ | Let's POSTGRES
NTT ã‚ªãƒ¼ãƒ—ãƒ³ã‚½ãƒ¼ã‚¹ã‚½ãƒ•ãƒˆã‚¦ã‚§ã‚¢ã‚»ãƒ³ã‚¿ ç¬ åŽŸ è¾°ä» ã¯ã˜ã‚ã« PostgreSQLã®ãƒãƒ¼ã‚¸ãƒ§ãƒ³8.2ã‹ã‚‰ã€Soralis, FreeBSD, Mac OSXãªã©ã§ä½¿ç”¨å¯èƒ½ãªDtraceã¨ã„ã†æƒ…å ±å–å¾—ãƒ„ãƒ¼ãƒ«ã«å¯¾å¿œã—ã¾ã—ãŸã€‚Dtraceã‚’ä½¿ã†ã¨ã€PostgreSQLã®ãƒˆãƒ¬ãƒ¼ã‚·ãƒ³ã‚° (ã‚ã‚‹å‡¦ç†ãŒã©ã®ã‚ˆã†ãªé–¢æ•°ç‰ã‚’é€šéŽã—ã¦ããŸã‹ã®è§£æž) ã‚„ãƒ—ãƒãƒ•ã‚¡ã‚¤ãƒªãƒ³ã‚° (ã‚ã‚‹æœŸé–“ã«ã©ã‚“ãªå‡¦ç†ãŒã©ã‚Œã ã‘å®Ÿæ–½ã•ã‚ŒãŸã‹ã®è§£æž) ãŒå¯èƒ½ã«ãªã‚Šã¾ã™ã€‚PostgreSQLã®ãƒžãƒ‹ãƒ¥ã‚¢ãƒ«ã§ã‚‚å‹•çš„è¿½è·¡ã¨ã„ã†é …ã§ç´¹ä»‹ã•ã‚Œã¦ã„ã¾ã™ã€‚ã“ã‚Œã‚’åˆ©ç”¨ã™ã‚‹ã“ã¨ã§ã€ãƒœãƒˆãƒ«ãƒãƒƒã‚¯ã®ç™ºè¦‹ãªã©ãŒå¯èƒ½ã«ãªã‚Šã¾ã™ã€‚ Linuxã§ã¯ã€Dtraceã®é¡žä¼¼ã®æ©Ÿæ§‹ã¨ã—ã¦Systemtapã¨ã„ã†ãƒ„ãƒ¼ãƒ«ãŒå‚™ã‚ã£ã¦ã„ã¾ã™ã€‚æœ¬æ¥ã¯ã€ã‚«ãƒ¼ãƒãƒ«å†…éƒ¨ã®ãƒˆãƒ¬ãƒ¼ã‚·ãƒ³ã‚°ã‚„ãƒ—ãƒãƒ•ã‚¡ã‚¤ãƒªãƒ³ã‚°ã‚’ä¸»ãªç›®çš„ã¨ã—ãŸãƒ„ãƒ¼ãƒ«ã§ã™ãŒã€ãƒ¦ãƒ¼ã‚¶ã‚¢ãƒ—ãƒªã‚±ãƒ¼ã‚·ãƒ§ãƒ³ã®æƒ…å ±å–å¾—ã‚‚å¯èƒ½ã§ã™ã€‚æœ¬è¨˜äº‹ã§ã¯ã€Sys
dann 2011/01/16
systemtap
ãƒªãƒ³ã‚¯
ãƒ¬ãƒƒãƒ‰ãƒãƒƒãƒˆ ãƒžã‚¬ã‚¸ãƒ³ 64ãƒ“ãƒƒãƒˆã‚³ãƒ³ãƒ”ãƒ¥ãƒ¼ãƒ†ã‚£ãƒ³ã‚°: 32ãƒ“ãƒƒãƒˆç’°å¢ƒã§ã®å…±å˜
Guilt is usually considered a negative emotion, but by steering it well, you can achieve surprising success.
dann 2011/01/16
systemtap

linux
ãƒªãƒ³ã‚¯
SystemTapã§çœŸçŠ¯äººã‚’æ•ã¾ãˆã‚ï¼
å›³2ã¯ãƒªãƒ–ãƒ¼ãƒˆã™ã‚‹å°‘ã—å‰ã®/proc/meminfoã«ã¤ã„ã¦ã€å‰é …ã®è¦³ç‚¹ã«åŸºã¥ã„ã¦ç©ã¿ä¸Šã’ã‚°ãƒ©ãƒ•ã‚’ä½œã£ãŸã‚‚ã®ã§ã™ã€‚ ã»ã¼ã™ã¹ã¦ã®ãƒ¡ãƒ¢ãƒªãŒActiveã¨ãªã£ã¦ãŠã‚Šã€MemFreeã‚„Inactiveã¯ã‚ãšã‹ã§ã™ã€‚ã“ã‚Œã¯ç¢ºã‹ã«ãƒ¡ãƒ¢ãƒªä¸è¶³ã¨ã„ãˆãã†ã§ã™ã€‚ã‚«ãƒ¼ãƒãƒ«ã®ç‰©ç†ãƒ¡ãƒ¢ãƒªãŒæ€ªã—ã„ã¨è€ƒãˆã¦ã„ãŸã®ã§ã™ãŒã€è‚å¿ƒã®PageTablesã‚„Slabã€VmallocUsedãªã©ã¯ã‚ã¾ã‚Šå¢—ãˆã¦ã„ã¾ã›ã‚“ã€‚ã“ã‚Œã¯ä¸€ä½“ã©ã†ã„ã†ã“ã¨ã§ã—ã‚‡ã†ã‹ï¼Ÿ â€¦â€¦ã¨ã€ã“ã“ã¾ã§ãã¦ã€1ã¤ä¸å¯©ãªç‚¹ã«æ°—ãŒä»˜ãã¾ã›ã‚“ã‹ï¼Ÿ ãã†ã€‚ã™ã¹ã¦ã‚’è¶³ã—ãŸãƒ¡ãƒ¢ãƒªã®ç·é‡ãŒç´„12Gbytesã—ã‹ã‚ã‚Šã¾ã›ã‚“ã€‚ç¢ºã‹ã“ã®ã‚µãƒ¼ãƒã¯ãƒ¡ãƒ¢ãƒªã‚’50Gbytesæè¼‰ã—ã¦ã„ã¾ã—ãŸã‚ˆãï¼Ÿ ãã‚ŒãŒã„ã¤ã®é–“ã«ã‹12Gbytesã«ãªã£ã¦ã„ã‚‹â€¦â€¦ä½•ã‚„ã‚‰å¤§å¤‰ãªã“ã¨ãŒèµ·ãã¦ã„ãã†ã§ã™ã€‚ ç¢ºèªã®ãŸã‚ã«ã€ãƒªãƒ–ãƒ¼ãƒˆæ™‚å‰å¾Œã®ãƒ¡ãƒ¢ãƒªä½¿ç”¨é‡ã®ã‚°ãƒ©ãƒ•ã‚’è¦‹ã¦ã¿ã¾ã—ã‚‡ã†ï¼ˆå›³3ï¼‰ã€‚ãƒªãƒ–ãƒ¼ãƒˆå‰ã¯10Gbytes
dann 2011/01/16
systemtap
ãƒªãƒ³ã‚¯
Linux performance tuning & stabilization tips (mysqlconf2010)
This document provides tips for optimizing Linux performance and stability when running MySQL. It discusses managing memory and swap space, including keeping hot application data cached in RAM. Direct I/O is recommended over buffered I/O to fully utilize memory. The document warns against allocating too much memory or disabling swap completely, as this could trigger the out-of-memory killer to cra
dann 2011/01/16
mysql

linux

ext3

xfs

systemtap
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.
dann 2010/11/24
systemtap

debugging

linux
ãƒªãƒ³ã‚¯
SystemTapã§çœŸçŠ¯äººã‚’æ•ã¾ãˆã‚ï¼
SystemTapã§çœŸçŠ¯äººã‚’æ•ã¾ãˆã‚ï¼ï¼šLinuxãƒˆãƒ©ãƒ–ãƒ«ã‚·ãƒ¥ãƒ¼ãƒ†ã‚£ãƒ³ã‚°æŽ¢åµå›£ã€€ç•ªå¤–ç·¨ï¼ˆ3ï¼‰ï¼ˆ1/4 ãƒšãƒ¼ã‚¸ï¼‰ NTTã‚°ãƒ«ãƒ¼ãƒ—ã®å„ç¤¾ã§é³´ã‚‰ã—ãŸä¿ºãŸã¡Linuxãƒˆãƒ©ãƒ–ãƒ«ã‚·ãƒ¥ãƒ¼ãƒ†ã‚£ãƒ³ã‚°æŽ¢åµå›£ã¯ã€å„ç¤¾ã§åŸ¹ã£ãŸOSSé–¢é€£æŠ€è¡“ã‚’æ‰‹ã«ã€NTT OSSã‚»ãƒ³ã‚¿ã«é›†ã‚ã‚‰ã‚ŒãŸã€‚æ™®æ®µã¯åŸºæœ¬çš„ã«NTTã‚°ãƒ«ãƒ¼ãƒ—ã®ã¿ã‚’ç›¸æ‰‹ã«æ´»å‹•ã—ã¦ã„ã‚‹ãŒã€ãã‚Œã ã‘ã§çµ‚ã‚ã‚‹ä¿ºãŸã¡ã˜ã‚ƒã‚ãªã„ã€‚ ã‚½ãƒ¼ã‚¹ã‚³ãƒ¼ãƒ‰ã•ãˆã‚ã‚Œã°ã©ã‚“ãªãƒˆãƒ©ãƒ–ãƒ«ã§ã‚‚è§£æ±ºã™ã‚‹å‘½çŸ¥ã‚‰ãšã€ä¸å¯èƒ½ã‚’å¯èƒ½ã«ã—ã€å¤šãã®ãƒã‚°ã‚’ç²‰ç •ã™ã‚‹ã€ä¿ºãŸã¡Linuxãƒˆãƒ©ãƒ–ãƒ«ã‚·ãƒ¥ãƒ¼ãƒ†ã‚£ãƒ³ã‚°æŽ¢åµå›£ï¼ã€€åŠ©ã‘ã‚’å€Ÿã‚ŠãŸã„ã¨ãã¯ã€ã„ã¤ã§ã‚‚ã„ã£ã¦ãã‚Œï¼ OSï¼šé«˜ç”°å“²ç”Ÿ ä¿ºã¯ãƒªãƒ¼ãƒ€ãƒ¼ã€é«˜ç”°å“²ç”Ÿã€‚Linuxã®é”äººã€‚ä¿ºã®ã‚ˆã†ã«ã‚½ãƒ¼ã‚¹ã‚³ãƒ¼ãƒ‰ãƒ¬ãƒ™ãƒ«ã§OSã‚’ç†è§£ã—ã¦ã„ã‚‹äººé–“ã§ãªã‘ã‚Œã°ã€ç™¾æˆ¦éŒ¬ç£¨ã®Linuxãƒˆãƒ©ãƒ–ãƒ«ã‚·ãƒ¥ãƒ¼ãƒ†ã‚£ãƒ³ã‚°æŽ¢åµå›£ã®ãƒªãƒ¼ãƒ€ãƒ¼ã¯å‹™ã¾ã‚‰ã‚“ã€‚ Webï¼šç¦å±±ç¾©ä» ä¿ºã¯ã€ç¦å±±ç¾©ä»ã€‚WebæŠ€è¡“ã®é”äººã•ã€‚Apache
dann 2010/11/24
systemtap

debugging

linux
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1