14264 2008-01-31 16:24:22 +0300 Вызов posix_fadvise в ld.so 2008-11-07 20:50:13 +0300 1 1 4 Development Sisyphus glibc unstable all Linux CLOSED FIXED P2 enhancement --- 1 ulfr glebfm glebfm ldv qa-sisyphus oldest_to_newest 62377 0 ulfr 2008-01-31 16:24:22 +0300 Приложенный патч добавляет вызов posix_fadvise в ld.so на все подгружаемые библиотеки. Это позволяет ядру предварительно загрузить библиотеки в кэш, и тем самыс ускорить запуск программ. Патч взят из SuSe, и немного модифицирован под Альт ( вызов getenv заменен на __secure_getenv), прикладывать его нужно последним. 62378 1 2402 ulfr 2008-01-31 16:25:15 +0300 Created attachment 2402 Сам патч 66509 2 ldv 2008-03-24 14:00:50 +0300 (In reply to comment #1) > Created an attachment (id=2402) [edit] > Сам патч Не похоже, чтобы он делал что-то осмысленное: $ strace -qe fadvise64 ls /var/empty fadvise64(3, 0, 29204, POSIX_FADV_WILLNEED) = -1 EINVAL (Invalid argument) fadvise64(3, 0, 91768, POSIX_FADV_WILLNEED) = -1 EINVAL (Invalid argument) fadvise64(3, 0, 27652, POSIX_FADV_WILLNEED) = -1 EINVAL (Invalid argument) fadvise64(3, 0, 1214724, POSIX_FADV_WILLNEED) = -1 EINVAL (Invalid argument) fadvise64(3, 0, 86496, POSIX_FADV_WILLNEED) = -1 EINVAL (Invalid argument) fadvise64(3, 0, 16044, POSIX_FADV_WILLNEED) = -1 EINVAL (Invalid argument) $ 66510 3 ldv 2008-03-24 14:03:41 +0300 Вот ещё информация к размышлению: $ strace -qe open,fstat64,fadvise64 echo open("/lib/libc.so.6", O_RDONLY) = 3 fstat64(3, {st_mode=S_IFREG|0755, st_size=1208640, ...}) = 0 fadvise64(3, 0, 1214724, POSIX_FADV_WILLNEED) = -1 EINVAL (Invalid argument) 66527 4 ulfr 2008-03-24 15:19:10 +0300 а какое ядро? у меня выдаёт следующее: [14:16:40 warlock@maaneheim work]$strace ./ld-2.5.so /bin/ls 2>&1 | grep fad mmap2(NULL, 29236, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0xb7fad000 fadvise64(3, 0, 29236, POSIX_FADV_WILLNEED) = 0 fadvise64(3, 0, 91768, POSIX_FADV_WILLNEED) = 0 fadvise64(3, 0, 27652, POSIX_FADV_WILLNEED) = 0 fadvise64(3, 0, 1214724, POSIX_FADV_WILLNEED) = 0 fadvise64(3, 0, 86496, POSIX_FADV_WILLNEED) = 0 fadvise64(3, 0, 16044, POSIX_FADV_WILLNEED) = 0 66531 5 ulfr 2008-03-24 15:47:14 +0300 отрабатывает нормально с 2.6.24 и 2.6.18, результат из чрута с ALD и пропатченой glibc-2.5-alt4: [14:43:38 root@tunglheim /]#cat /etc/redhat-release ALT Linux 4.0 Desktop (Ajuga) [14:43:52 root@tunglheim /]#strace -qe fadvise64 ls /var/empty fadvise64(3, 0, 85752, POSIX_FADV_WILLNEED) = 0 fadvise64(3, 0, 170276, POSIX_FADV_WILLNEED) = 0 fadvise64(3, 0, 1202436, POSIX_FADV_WILLNEED) = 0 fadvise64(3, 0, 86496, POSIX_FADV_WILLNEED) = 0 fadvise64(3, 0, 37520, POSIX_FADV_WILLNEED) = 0 [14:46:49 root@tunglheim /]#strace -qe open,fstat64,fadvise64 echo open("/etc/ld.so.cache", O_RDONLY) = 3 fstat64(3, {st_mode=S_IFREG|0644, st_size=113233, ...}) = 0 open("/lib/libc.so.6", O_RDONLY) = 3 fstat64(3, {st_mode=S_IFREG|0755, st_size=1192256, ...}) = 0 fadvise64(3, 0, 1202436, POSIX_FADV_WILLNEED) = 0 fstat64(1, {st_mode=S_IFCHR|0620, st_rdev=makedev(136, 0), ...}) = 0 66548 6 ldv 2008-03-24 16:53:52 +0300 (In reply to comment #4) > а какое ядро? $ uname -rm 2.6.18-ovz-smp-alt22 x86_64 66549 7 ulfr 2008-03-24 17:17:34 +0300 > 2.6.18-ovz-smp-alt22 x86_64 уж не _64 всё портит, мои результаты на 32-битной системе 80810 8 ldv 2008-11-07 20:50:09 +0300 (In reply to comment #7) > > 2.6.18-ovz-smp-alt22 x86_64 > уж не _64 всё портит, > мои результаты на 32-битной системе Нет, это ovz не даёт. Приложено в 2.8.90-alt3 2402 2008-01-31 16:25:15 +0300 2008-01-31 16:25:15 +0300 Сам патч glibc-2.3.90-ld.so-madvise.diff text/plain 2459 ulfr ZGlmZiAtTmF1ciBnbGliYy0yLjUuMS1hbHQyLm9yaWcvZWxmL2RsLWxvYWQuYyBnbGliYy0yLjUu MS1hbHQyL2VsZi9kbC1sb2FkLmMKLS0tIGdsaWJjLTIuNS4xLWFsdDIub3JpZy9lbGYvZGwtbG9h ZC5jCTIwMDgtMDEtMTcgMTY6Mzc6MjMgKzAyMDAKKysrIGdsaWJjLTIuNS4xLWFsdDIvZWxmL2Rs LWxvYWQuYwkyMDA4LTAxLTE3IDE2OjUxOjQyICswMjAwCkBAIC0xMjEzLDYgKzEyMTMsMTEgQEAK IAkgICAgZ290byBjYWxsX2xvc2VfZXJybm87CiAJICB9CiAKKwlpZiAoR0xSTyhkbF9tYWR2aXNl KSkgeworCSAgLy9mYWR2aXNpbmcKKwkgIHBvc2l4X2ZhZHZpc2UgKGZkLCBjLT5tYXBvZmYsIG1h cGxlbmd0aCwgUE9TSVhfRkFEVl9XSUxMTkVFRCk7CisJfQorCiAJbC0+bF9tYXBfZW5kID0gbC0+ bF9tYXBfc3RhcnQgKyBtYXBsZW5ndGg7CiAJbC0+bF9hZGRyID0gbC0+bF9tYXBfc3RhcnQgLSBj LT5tYXBzdGFydDsKIApkaWZmIC1OYXVyIGdsaWJjLTIuNS4xLWFsdDIub3JpZy9lbGYvZGwtc3Vw cG9ydC5jIGdsaWJjLTIuNS4xLWFsdDIvZWxmL2RsLXN1cHBvcnQuYwotLS0gZ2xpYmMtMi41LjEt YWx0Mi5vcmlnL2VsZi9kbC1zdXBwb3J0LmMJMjAwOC0wMS0xNyAxNjozNzoyNyArMDIwMAorKysg Z2xpYmMtMi41LjEtYWx0Mi9lbGYvZGwtc3VwcG9ydC5jCTIwMDgtMDEtMTcgMTY6NDQ6MzcgKzAy MDAKQEAgLTQyLDYgKzQyLDcgQEAKIAogaW50IF9kbF9kZWJ1Z19tYXNrOwogaW50IF9kbF9sYXp5 OworaW50IF9kbF9tYWR2aXNlOwogRWxmVyhBZGRyKSBfZGxfdXNlX2xvYWRfYmlhcyA9IC0yOwog aW50IF9kbF9keW5hbWljX3dlYWs7CiAKQEAgLTI1MSw2ICsyNTIsOCBAQAogCiAgIF9kbF9sYXp5 ID0gKihfX3NlY3VyZV9nZXRlbnYgKCJMRF9CSU5EX05PVyIpID86ICIiKSA9PSAnXDAnOwogCisg IF9kbF9tYWR2aXNlID0gKihfX3NlY3VyZV9nZXRlbnYgKCJMRF9OT01BRFZJU0UiKSA/OiAiIikg PT0gJ1wwJzsKKwogICBfZGxfYmluZF9ub3QgPSAqKF9fc2VjdXJlX2dldGVudiAoIkxEX0JJTkRf Tk9UIikgPzogIiIpICE9ICdcMCc7CiAKICAgX2RsX2R5bmFtaWNfd2VhayA9ICooX19zZWN1cmVf Z2V0ZW52ICgiTERfRFlOQU1JQ19XRUFLIikgPzogIiIpID09ICdcMCc7CmRpZmYgLU5hdXIgZ2xp YmMtMi41LjEtYWx0Mi5vcmlnL2VsZi9ydGxkLmMgZ2xpYmMtMi41LjEtYWx0Mi9lbGYvcnRsZC5j Ci0tLSBnbGliYy0yLjUuMS1hbHQyLm9yaWcvZWxmL3J0bGQuYwkyMDA4LTAxLTE3IDE2OjM3OjI3 ICswMjAwCisrKyBnbGliYy0yLjUuMS1hbHQyL2VsZi9ydGxkLmMJMjAwOC0wMS0xNyAxNjo0Mzo0 OSArMDIwMApAQCAtMTUyLDYgKzE1Miw3IEBACiAgICAgLl9kbF9sYXp5ID0gMSwKICAgICAuX2Rs X2ZwdV9jb250cm9sID0gX0ZQVV9ERUZBVUxULAogICAgIC5fZGxfcG9pbnRlcl9ndWFyZCA9IDEs CisgICAgLl9kbF9tYWR2aXNlID0gMSwKIAogICAgIC8qIEZ1bmN0aW9uIHBvaW50ZXJzLiAgKi8K ICAgICAuX2RsX2RlYnVnX3ByaW50ZiA9IF9kbF9kZWJ1Z19wcmludGYsCkBAIC0yNTc0LDYgKzI1 NzUsMTQgQEAKIAkgIGJyZWFrOwogCiAJY2FzZSA5OgorCSAgLyogVGVzdCB3aGV0aGVyIHdlIHNo b3VsZCBub3QgYWR2aXNlIHRoZSBrZXJuZWwKKwkgICAgIGFib3V0IG1lbW9yeSB1c2FnZS4gICov CisJICBpZiAobWVtY21wIChlbnZsaW5lLCAiTk9NQURWSVNFIiwgOSkgPT0gMCkKKwkgICAgewor CSAgICAgIEdMUk8oZGxfbWFkdmlzZSkgPSBlbnZsaW5lWzEwXSA9PSAnXDAnOworCSAgICAgIGJy ZWFrOworCSAgICB9CisKIAkgIC8qIFRlc3Qgd2hldGhlciB3ZSB3YW50IHRvIHNlZSB0aGUgY29u dGVudCBvZiB0aGUgYXV4aWxpYXJ5CiAJICAgICBhcnJheSBwYXNzZWQgdXAgZnJvbSB0aGUga2Vy bmVsLiAgKi8KIAkgIGlmIChtZW1jbXAgKGVudmxpbmUsICJTSE9XX0FVWFYiLCA5KSA9PSAwKQpk aWZmIC1OYXVyIGdsaWJjLTIuNS4xLWFsdDIub3JpZy9zeXNkZXBzL2dlbmVyaWMvbGRzb2RlZnMu aCBnbGliYy0yLjUuMS1hbHQyL3N5c2RlcHMvZ2VuZXJpYy9sZHNvZGVmcy5oCi0tLSBnbGliYy0y LjUuMS1hbHQyLm9yaWcvc3lzZGVwcy9nZW5lcmljL2xkc29kZWZzLmgJMjAwOC0wMS0xNyAxNjoz NzoyNiArMDIwMAorKysgZ2xpYmMtMi41LjEtYWx0Mi9zeXNkZXBzL2dlbmVyaWMvbGRzb2RlZnMu aAkyMDA4LTAxLTE3IDE2OjQzOjQ5ICswMjAwCkBAIC01NzMsNiArNTczLDkgQEAKICAgLyogRG8g d2UgZG8gbGF6eSByZWxvY2F0aW9ucz8gICovCiAgIEVYVEVSTiBpbnQgX2RsX2xhenk7CiAKKyAg LyogU2hvdWxkIHdlIGFkdmlzZSBrZXJuZWwgYWJvdXQgbWVtb3J5IHVzYWdlPyAqLworICBFWFRF Uk4gaW50IF9kbF9tYWR2aXNlOworCiAgIC8qIE5vbnplcm8gaWYgcnVudGltZSBsb29rdXBzIHNo b3VsZCBub3QgdXBkYXRlIHRoZSAuZ290Ly5wbHQuICAqLwogICBFWFRFUk4gaW50IF9kbF9iaW5k X25vdDsKIAo=