Java Flame Graphs
Recent posts: 22 Jul 2024 » No More Blue Fridays 24 Mar 2024 » Linux Crisis Tools 17 Mar 2024 » The Return of the Frame Pointers 10 Mar 2024 » eBPF Documentary 28 Apr 2023 » eBPF Observability Tools Are Not Security Tools 01 Mar 2023 » USENIX SREcon APAC 2022: Computing Performance: What's on the Horizon 17 Feb 2023 » USENIX SREcon APAC 2023: CFP 02 May 2022 » [email protected] 15 Apr 2022 » Netfl
Go pprof マスター編 (pprof ã®ä»•çµ„ã¿)
ã“ã®è¨˜äº‹ã¯ KLab Advent Calendar 2015 ã®19日目ã®è¨˜äº‹ã§ã™ã€‚ pprof 連載最後ã¯ã€ ã“ã“ã¾ã§ã§ç´¹ä»‹ã—ã¦ããŸãƒ—ãƒãƒ•ã‚¡ã‚¤ãƒ©ãŒã©ã†ã„ã†ä»•çµ„ã¿ã§ãƒ—ãƒãƒ•ã‚¡ã‚¤ãƒªãƒ³ã‚°ã—ã¦ã„ã‚‹ã‹ã‚’解説ã—ã¾ã™ã€‚ pprof ãŒè¡¨ç¤ºã—ã¦ã„る値ãŒã©ã†è¨ˆç®—ã•ã‚Œã¦ã„ã‚‹ã®ã‹ã‚’把æ¡ã™ã‚‹ã“ã¨ã§ã€ã‚ˆã‚Šãƒ—ãƒãƒ•ã‚¡ã‚¤ãƒ©ã‚’ç†è§£ã—ã¦ä½¿ã„ã“ãªã™ã“ã¨ãŒã§ãるよã†ã«ãªã‚‹ã¯ãšã§ã™ã€‚ goroutine profile スタックダンプ (/debug/pprof/goroutine?debug=1) ã®å‡ºåŠ›ã¯æ¬¡ã®ã‚ˆã†ãªå½¢å¼ã§ã—ãŸã€‚ ... 1 @ 0x42d2b3 0x42d374 0x414cda 0x45d981 # 0x42d2b3 runtime.gopark+0x163 /usr/local/go/src/runtime/proc.go:186 # 0x42d374 runtime.goparkunlock+0x54
mydoc/gpu_profiler_counter.md at main · iwag/mydoc
GPU Advent Calendar 2012 21日目ã®è¨˜äº‹ã§ã™ã€‚ ã‚ã®ã よ〠ワス今ã•ã‚‰ãªã‚“ã ケドGPGPUã«èˆˆå‘³ãŒã§ã¦ãã¦CUDAãªã‚“ã‹èª¿ã¹ã¦ãŸã‚‰ã€ãŠå£°ãŒã‹ã‹ã£ã¦ã“ã†ã„ã†æ›¸ã„ã¦ã„ã‚‹ã‚ã‘ã§ã™ã‚ˆã€‚ GPUã‚„ã‚ã†ã¨æ€ã£ãŸã®ã‚‚特ã«ãªã‚“ã‹ä½œã‚ŠãŸã„ã‚‚ã®ãŒã‚ã£ãŸã‚Šã™ã‚‹ã‚ã‘ã˜ã‚ƒãªã„ケドã€ã‚„ã£ã±ã‚ŠGPU使ã†ä»¥ä¸Šæ—©ããªã£ã¦æ¬²ã—ã„ã‚ã‘ã˜ã‚ƒã‚“ã‹ã€‚ ã§ã„ã‚ã„ã‚本ã¨ã‹NVIDIAã®è³‡æ–™ã¨ã‹ã‚¦ã‚§ãƒƒãƒ–ã§è³‡æ–™èªã‚“ã ã‚Šã—ã¦ã‚‹ã‚ã‘ã§ã™ã€‚ ã ã‘ã©ã‚‚ã•ã‚ã€ã“ã‚Œã¯ãƒãƒ³ãƒ‰å¹…制é™ã ã™ã‚ˆã¨ã‹ã‚³ã‚¢ãƒ¬ãƒƒã‚·ãƒ³ã‚°ã§ã™ã‚ˆã¨ã‹ã‚·ã‚§ã‚¢ãƒ‰ãƒ¡ãƒ¢ãƒªãŒãƒãƒ³ã‚¯ã‚³ãƒ³ãƒ•ãƒªã‚¯ãƒˆã¨ã‹åˆ†å²ãŒã©ã†ã—ã¦ã¾ã™ã‚ˆã¨ã‹ã€‚ ã„ã‚„ãワスã¿ãŸã„ãªåˆå¿ƒè€…ã«ã¯ãƒ—ãƒã‚°ãƒ©ãƒ ã¿ã¦ã“ã“ãŒã‚³ã‚¢ãƒ¬ãƒƒã‚·ãƒ³ã‚°ã よã¨ã‹æ£ç›´ãã³ã—ã„。 ã¾ã‚作ã£ã¦ã¿ã¦æ¸¬ã‚Œã°ã„ã„ã˜ã‚ƒã‚“ã¨ã‹è¨€ã‚れるã¨ãã…ã®éŸ³ã‚‚ã§ãªã„ã‚“ã ケドã•ã€ãƒ¯ã‚¹ã¯é«˜é€ŸåŒ–ã™ã‚‹ãŸã‚ã«è¡Œãã¤æˆ»ã‚Šã¨ã‹ã—ãŸããªã„ã‚“ã よï¼ï¼ ã¨ã„ã†ã‹ãƒ¯ã‚¹ã€ãƒ›ãƒ³ãƒˆæƒ…ã‘ãªã„ã“ã¨ãªã‚“ã ケ
MySQL 㧠SELECT COUNT(DISTINCT) VS SELECT COUNT(*) FROM (SELECT .. GROUP BY ..) AS t - blog.nomadscafe.jp
ã¨ã‚ã‚‹MySQLã®slowlogã«æ®‹ã£ã¦ã„ãŸã¨ã“ã‚ã‹ã‚‰è¦‹ã¤ã‘ãŸã‚¯ã‚¨ãƒªã®æ›¸ãæ›ãˆã€‚ サービスã®ã©ã“ã§ä½¿ã‚ã‚Œã¦ã„ã‚‹ã‚‚ã®ã‹ã¾ã§è©³ã—ãã¿ã¦ã„ãªã„ã‚“ã ã‘ã© CREATE TABLE `category2item` ( `id` int(10) unsigned NOT NULL AUTO_INCREMENT, `category_id` int(10) unsigned NOT NULL, `subcategory_id` int(10) unsigned NOT NULL, `item_id` int(10) unsigned NOT NULL, PRIMARY KEY (`id`), UNIQUE KEY `subcategory_id` (`subcategory_id`,`item_id`), KEY `picture_id` (`item_id`), KEY `category_id` (
プãƒãƒ•ã‚¡ã‚¤ãƒªãƒ³ã‚°ã§å¿«é©MySQLãƒãƒ¥ãƒ¼ãƒ‹ãƒ³ã‚°ç”Ÿæ´»
MySQL 5.1ã‹ã‚‰ãƒ‡ãƒ•ã‚©ãƒ«ãƒˆã§æœ‰åŠ¹ã«ãªã£ã¦ã„る便利ãªæ©Ÿèƒ½ã¨ã—ã¦ãƒ—ãƒãƒ•ã‚¡ã‚¤ãƒªãƒ³ã‚°ã¨ã„ã†ã‚‚ã®ãŒã‚る。MySQL 5.0ã§ã‚‚利用出æ¥ãŸã®ã ãŒã€å®Ÿé¨“çš„ãªæ©Ÿèƒ½ã¨ã„ã†ä½ç½®ã¥ã‘ã§ã‚ã‚Šã€æ載ã•ã‚Œã¦ã„ãŸã®ã¯GPL版ã®MySQL Community Serveré™å®šã ã£ãŸã€‚MySQL 5.1ã‹ã‚‰ã¯å…¨ã¦ã®ã‚¨ãƒ‡ã‚£ã‚·ãƒ§ãƒ³ã§ãƒ—ãƒãƒ•ã‚¡ã‚¤ãƒªãƒ³ã‚°ã‚’利用ã™ã‚‹ã“ã¨ãŒã§ãる。 プãƒãƒ•ã‚¡ã‚¤ãƒªãƒ³ã‚°æ©Ÿèƒ½ã‚’利用ã™ã‚‹ã¨ã€ã‚¯ã‚¨ãƒªã®çŠ¶æ…‹ï¼ˆç‰¹ã«çŠ¶æ…‹é·ç§»ã‚„リソースã®æ¶ˆè²»çŠ¶æ³ï¼‰ã‚’詳細ã«åˆ†æžã§ãã‚‹ã®ã§ã¨ã¦ã‚‚便利ã 。MySQLエンジニア必æºã®æ©Ÿèƒ½ã¨ã„ã£ã¦è‰¯ã„ã ã‚ã†ã€‚ã¨ã„ã†ã‚ã‘ã§ãƒ—ãƒãƒ•ã‚¡ã‚¤ãƒªãƒ³ã‚°æ©Ÿèƒ½ã®ä½¿ã„方を説明ã—よã†ã€‚ MySQLサーãƒã«ãƒã‚°ã‚¤ãƒ³ã—ãŸã‚‰ã€ã¾ãšã¯æ¬¡ã®ã‚ˆã†ã«ã—ã¦ãƒ—ãƒãƒ•ã‚¡ã‚¤ãƒªãƒ³ã‚°ã‚’有効ã«ã™ã‚‹ã€‚ mysql> SET profiling=1; ã™ã‚‹ã¨ã€ã‚¯ã‚¨ãƒªã®æƒ…å ±ãŒè¨˜éŒ²ã•ã‚Œã‚‹ã‚ˆã†ã«ãªã‚‹ã€‚次ã«ã€åˆ†æžã—ãŸã„クエリを実行ã™ã‚‹ã€‚クエリã¯ãªã‚“ã§ã‚‚ã„ã„
MacOSXã§ã¯gprofãŒä½¿ãˆãªã„→Sharkを使ㆠ- 西尾泰和ã®ã¯ã¦ãªãƒ€ã‚¤ã‚¢ãƒªãƒ¼
gprofã®ä½¿ã„æ–¹ãŒã‚ˆãã‚ã‹ã‚‰ãªã„ã§ã™ã¹ã¦ã®é–¢æ•°ãŒ0秒ã«ãªã£ã¦ã—ã¾ã†ã“ã¨ã«æ‚©ã‚“ã§ã„ãŸãŒã€gprofã®ä½¿ã„方を間é•ãˆã¦ã„ã‚‹ã®ã ã¨æ€ã£ã¦èª¿ã¹ã¦ã„ãŸã®ãŒé–“é•ã„ã ã£ãŸã€‚gprof bug on Mac OS X?。 ã§ã€ã‹ã‚ã‚Šã«Sharkを使ã†ã¨ã„ã†è©±ãŒæ›¸ã„ã¦ã‚ã£ã¦èª¿ã¹ã¦ã¿ãŸã®ã ã‘ã©ãªã‹ãªã‹ã‚ˆã•ãã†: Optimize with Shark: Big Payoff, Small Effort ã¤ã„ã“ã®å‰ãƒ€ã‚¦ãƒ³ãƒãƒ¼ãƒ‰ã—ãŸXCodeãŒæ‰‹å…ƒã«ã‚ã£ãŸã®ã§ãã‚Œã‹ã‚‰å…¥ã‚Œã‚‹ã€‚CHUDã®ä¸ã«å…¥ã£ã¦ã„る。 /Developer/Applications/Performance Tools/ã«ã‚¤ãƒ³ã‚¹ãƒˆãƒ¼ãƒ«ã•ã‚ŒãŸã€‚ 早速試ã—ã¦ã¿ãŸã€‚ turnã®ä¸ã§freeã—ã¦ã„ã‚‹ã®ãŒä¸€ç•ªè² æ‹…ã«ãªã£ã¦ã„ã‚‹ã¨ã„ã†ã“ã¨ã‹ãªã€‚明示的ã«freeã¯ã—ã¦ã„ãªã„ã®ã ã‘ã©ã€ã‚ˆã†ã¯è‡ªå‹•çš„ã«ä½œã‚‰ã‚Œã¦ã„る一時オブジェクトãŒé‡ãŸã„ã¨ã„ã†ã“ã¨ã‹ã€‚明示的ã«ä½œã£ã¦f
OProfileã®ä½¿ã„方備忘録 - hogelogã®æ—¥è¨˜
プãƒã‚°ãƒ©ãƒ ã®ãƒœãƒˆãƒ«ãƒãƒƒã‚¯ãŒã©ã“ã«ã‚ã‚‹ã®ã‹ã€ãªã‚“ã¦èª¿ã¹ã‚‹ã¨ãã«ã¯è¨ˆæ¸¬ã™ã‚‹å¿…è¦ãŒã‚ã‚Šã¾ã™ã。プãƒã‚°ãƒ©ãƒ ä¸ã®ç‰¹å®šå‡¦ç†ã®å‰å¾Œã§rdtsc命令使ã£ã¦æ™‚間を計測ã—ã¦å‡¦ç†æ™‚間を求ã‚ã‚‹ã€ã¨ã‹ãã†ã„ã†ã“ã¨ã‚‚ã§ãã‚‹ã‚“ã§ã™ã‘ã©ã€ã¾ã‚ã‚ã‚“ã©ã†ã˜ã‚ƒãªã„ã§ã™ã‹ã€‚プãƒãƒ•ã‚¡ã‚¤ãƒ©ã‚’使ã„ã¾ã—ょã†ã€‚ プãƒãƒ•ã‚¡ã‚¤ãƒ©ã¨ã¯ãªã‚“ãžã‚„ã€Wikipediaã®æ€§èƒ½è§£æžã®ãƒšãƒ¼ã‚¸ã«è‰²ã€…書ã„ã¦ã¾ã™ã。 ãã†ã„ã†ã‚ã‘ã§OProfileã¨ã„ã†Linuxã§å‹•ãプãƒãƒ•ã‚¡ã‚¤ãƒ©ã‚’使ã£ã¦ã„ã‚‹ã®ã§ã€æœªæ¥ã®è‡ªåˆ†ã¨ã‹ã€ŒOProfileå‹•ã‹ã—ã¦ã¿ã¦ãƒ¼ã‘ã©ã•ã£ã±ã‚Šã‚ã‹ã‚‰ã‚“ï¼ã€ã¿ãŸã„ãªäººã®ãŸã‚ã«ã¾ã¨ã‚ã¦ãŠãã¾ã™ã€‚ OProfileã®ç‰¹å¾´ OProfile㯠計測ã—ãŸã„プãƒã‚°ãƒ©ãƒ ã«å¯¾ã—ã¦ç‰¹åˆ¥ãªå‡¦ç†ã‚’ã—ãªãã¦ã‚‚ã„ㄠ低レイヤーã®æƒ…å ±ã‚‚è¨ˆæ¸¬ã§ãã‚‹ gprofå½¢å¼ã®ã‚³ãƒ¼ãƒ«ã‚°ãƒ©ãƒ•ã‚‚表示ã§ãã‚‹ オーãƒãƒ¼ãƒ˜ãƒƒãƒ‰ãŒã¨ã¦ã‚‚å°ã•ã„ ã“れらã®ç‰¹å¾´ãŒã‚るらã—ã„ã§ã™ã€‚使ã£ã¦ã¿ã¦ç‰¹ã«å¬‰ã—ã„ã¨æ„Ÿã˜ãŸã®
OProfile - A System Profiler for Linux (News)
2020-07-20 OProfile 1.4.0 released OProfile 1.4.0 has been released. This release adds support for Marvell (Cavium) ThunderX2 and Hygon Dhyana CPU. This release also fixes issues with OProfile being unable to be built with newer versions of binutils and ensures that ocount does not leave orphan processes when an error occurs. 2018-07-16 OProfile 1.3.0 released OProfile 1.3.0 has been released. Thi
Linux：カーãƒãƒ«ã¾ã§å«ã‚ãŸãƒ—ãƒãƒ•ã‚¡ã‚¤ãƒ«ã®å–り方：プãƒã‚°ãƒ©ãƒžãƒ¼ç¤¾é•·ã®ãƒ–ãƒã‚°ï¼šã‚ªãƒ«ã‚¿ãƒŠãƒ†ã‚£ãƒ–・ブãƒã‚°
UNIXç³»OSã§ãƒ—ãƒã‚°ãƒ©ãƒŸãƒ³ã‚°ã‚’ã—ã¦ã„ã¦ã€æ€§èƒ½é¢ã§æ‚©ã‚“ã ã¨ãã«ã¯ã€gprofã¨ã„ã†ãƒ—ãƒãƒ•ã‚¡ã‚¤ãƒ©ã‚’使ã†ã¨ã€ç°¡å˜ã«ãƒ—ãƒã‚°ãƒ©ãƒ ä¸ã®é–¢æ•°å‘¼ã³å‡ºã—回数や関数実行時間ãªã©ã‚’測定ã™ã‚‹ã“ã¨ãŒã§ãã¾ã™ã€‚gccã®ã‚ªãƒ—ションã«-pgã‚’ã¤ã‘ã‚Œã°è‰¯ã„ã ã‘ã¨ã„ã†ã“ã¨ã§ã¨ã¦ã‚‚ç°¡å˜ã§ä¾¿åˆ©ã§ã™ã€‚ ã¨ã“ã‚ãŒã€gprofã§æ¸¬å®šã§ãã‚‹ã®ã¯ã€ã‚ãã¾ã§ã‚‚プãƒã‚°ãƒ©ãƒ 自体ã®å‡¦ç†ã ã‘ã§ã€ã‚«ãƒ¼ãƒãƒ«ã‚„ドライãƒã¾ã§å«ã‚ãŸæ¸¬å®šã¯ã§ãã¾ã›ã‚“。 ã“ã®ã¨ã“ã‚ã€ãƒãƒƒãƒˆãƒ¯ãƒ¼ã‚¯ãƒ—ãƒã‚°ãƒ©ãƒ ã®10Gイーサーã§ã®æ€§èƒ½å‘上をã—ã¦ã„ã‚‹ã®ã§ã™ãŒã€10Gクラスã«ãªã‚‹ã¨ãƒ—ãƒã‚°ãƒ©ãƒ 自体ã®å‡¦ç†ã¯ã‚‚ã¡ã‚ã‚“ã§ã™ãŒã€ã‚«ãƒ¼ãƒãƒ«å†…ã®å‡¦ç†ã‚„デãƒã‚¤ã‚¹ãƒ‰ãƒ©ã‚¤ãƒã§ã®å‡¦ç†ã‚‚ã‹ãªã‚Šå¤§ããªå½±éŸ¿ãŒã§ã¦ãã¾ã™ã€‚特ã«ã€ãƒãƒƒãƒˆãƒ¯ãƒ¼ã‚¯ã§ã®é€šä¿¡ã¯ã€ãƒãƒƒãƒˆãƒ¯ãƒ¼ã‚¯ãƒ‡ãƒã‚¤ã‚¹ã§ã®å‡ºå…¥ã‚Šã¯ä¸¦åˆ—化ã§ããªã‹ã£ãŸã‚Šã€ãƒ‘ケットã®é †åºã‚’入れ替ãˆã‚‰ã‚Œãªã„ã“ã¨ãŒã»ã¨ã‚“ã©ãªã©ã€ã©ã‚Œã ã‘CPUãŒä¸¦åˆ—処ç†ã«å¼·ããªã£ã¦ã‚‚ã€ãƒãƒƒãƒˆãƒ¯ãƒ¼ã‚¯é–¢é€£ã®å‡¦ç†
Dart VM Advent Calendar 2012 12/09 — Dart VM Overview 1.0 documentation
Linux Perf Profiling¶ dartã¯perfã¨é€£æºã—ã€å®Ÿè¡Œæ™‚ã®æƒ…å ±ã‚’å«ã‚ã¦profilingã™ã‚‹ã“ã¨ãŒã§ãã¾ã™ã€‚ 以下ã®URLã§ã‚‚紹介ã•ã‚Œã¦ã„ã¾ã™ã€‚ http://code.google.com/p/dart/wiki/Profiling 試ã—æ–¹ $ perf record -f -g dart --generate_perf_events_symbols aobench.dart $ perf report --call-graph flat JITコンパイルã—ãŸã‚³ãƒ¼ãƒ‰ã®ãƒ—ãƒãƒ•ã‚¡ã‚¤ãƒ«æƒ…å ±ã‚’å–å¾—ã§ãã¦ãŠã‚Šã€ãƒœãƒˆãƒ«ãƒãƒƒã‚¯ã®èª¿æŸ»ãŒã—ã‚„ã™ããªã£ã¦ã„ã¾ã™ã€‚ perfã§æ¸¬å®šæ™‚ã¯ã€dartã«â€“generate_perf_events_symbolsオプションを指定ã—ãªã„å ´åˆã€ Dart VMã¯å˜ä½“ã®ãƒ—ãƒã‚»ã‚¹ã¨ã—ã¦perfã®è§£æžå¯¾è±¡ã¨ãªã‚Šã¾ã™ã€‚ 以下ã®ã‚ˆã†ãªå‘³æ°—ãªã„プãƒãƒ•ã‚¡ã‚¤ãƒ«çµæžœã«ãª
ruby-profã¨KCacheGrindã§ãƒ—ãƒãƒ•ã‚¡ã‚¤ãƒ«é‡ŽéƒŽã«ãªã‚‹ - 昼メシ物語
速ã•ãŒè¶³ã‚Šãªã„ï¼ï¼ï¼ï¼ï¼ ãã‚“ãªæ™‚ã¯ãƒ—ãƒãƒ•ã‚¡ã‚¤ãƒªãƒ³ã‚°ã®æ™‚é–“ã§ã™ã。 Rubyã«ã¯æ¨™æº–添付ライブラリã¨ã—㦠profile ã¨ã„ã†ãƒ—ãƒãƒ•ã‚¡ã‚¤ãƒ©ãŒã¤ã„ã¦ãる。ã§ã‚‚ã“ã®ãƒ©ã‚¤ãƒ–ラリã¯ã‚ã¾ã‚Šã«é…ã™ãŽã¦å®Ÿç”¨ã«è€ãˆãªã„ã‹ã‚‰ã€å¤šåˆ†èª°ã‚‚使ã£ã¦ã„ãªã„。ã»ã¨ã‚“ã©ã®Rubyist㯠ruby-prof を使ã£ã¦ã„ã‚‹ã“ã¨ã ã‚ã†ã€‚ 今回ã¯ã“ã® ruby-prof を使ã£ã¦ Ruby プãƒã‚°ãƒ©ãƒ ã®ãƒ—ãƒãƒ•ã‚¡ã‚¤ãƒªãƒ³ã‚°ã™ã‚‹æ–¹æ³•ã‚’紹介ã™ã‚‹ã€‚ 計測ã™ã‚‹ï¼ˆruby-prof） ruby-profã¯rubygemsã§ç°¡å˜ã«å…¥ã‚‹ã€‚ $ gem install ruby-profruby-profã¨ã„ã†ã‚³ãƒžãƒ³ãƒ‰ãƒ©ã‚¤ãƒ³ãƒ„ールãŒã‚¤ãƒ³ã‚¹ãƒˆãƒ¼ãƒ«ã•ã‚Œã‚‹ã€‚ã“れを使ã†ã¨ã€ãƒ—ãƒã‚°ãƒ©ãƒ を変更ã™ã‚‹ã“ã¨ãªã手軽ã«ãƒ—ãƒãƒ•ã‚¡ã‚¤ãƒªãƒ³ã‚°ã‚’è¡Œã†ã“ã¨ãŒã§ãる。ruby-profコマンドã®usageã¯ä»¥ä¸‹ã®ã¨ãŠã‚Šã€‚ ruby_prof 0.9.2 Usage: ruby_
1
リリースã€éšœå®³æƒ…å ±ãªã©ã®ã‚µãƒ¼ãƒ“スã®ãŠçŸ¥ã‚‰ã›
最新ã®äººæ°—エントリーã®é…ä¿¡
j次ã®ãƒ–ックマーク
kå‰ã®ãƒ–ックマーク
lã‚ã¨ã§èªã‚€
eコメント一覧を開ã
oページを開ã
Pusher | Leader In Realtime Technologies
Chapter 2. Overview
{{#tags}}- {{label}}
{{/tags}}