Edit report at https://bugs.php.net/bug.php?id=76867&edit=1
ID: 76867
User updated by: ivokund at gmail dot com
Reported by: ivokund at gmail dot com
Summary: Extremely slow performance
Status: Open
Type: Bug
Package: Performance problem
Operating System: Ubuntu 18.04.1 LTS
PHP Version: 7.2.9
Block user comment: N
Private report: N
New Comment:
Ok, got some new information. This is the first time I hear about huge pages, so pretty sure, I
haven't configured anything on purpose.
Setting USE_ZEND_ALLOC_HUGE_PAGES=0 in environment does not seem to have any effect.
_______________
$ export USE_ZEND_ALLOC_HUGE_PAGES=0
$ echo $USE_ZEND_ALLOC_HUGE_PAGES
0
$ time php -n --version
PHP 7.2.9-1+ubuntu18.04.1+deb.sury.org+1 (cli) (built: Aug 19 2018 07:16:54) ( NTS )
Copyright (c) 1997-2018 The PHP Group
Zend Engine v3.2.0, Copyright (c) 1998-2018 Zend Technologies
real 0m10,453s
user 0m0,049s
sys 0m0,024s
_______________
Here is a complete output from "strace php -n --version" with USE_ZEND_ALLOC_HUGE_PAGES=0
https://pastebin.com/raw/Cnmvarqd
Any further ideas would be greatly appreciated!
Previous Comments:
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[2018-09-13 06:22:27] ivokund at gmail dot com
The manifestation of this problem apparently also varies daily, as I'm having trouble
reproducing it today (although, there have been no reboots).
I'll continue debugging as soon as the problem returns and will get back to you.
Thanks for your help so far!
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[2018-09-12 13:33:26] sjon at hortensius dot net
Huge pages should be disabled by default, see also #70984 Did you or your distro enable it? Can you
try with USE_ZEND_ALLOC_HUGE_PAGES=0
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[2018-09-12 08:40:46] ivokund at gmail dot com
Ok, strace seems to tell me that process seems to hang at:
madvise(0x7f70efe00000, 2097152, MADV_HUGEPAGE) = 0
Any ideas?
Thanks!
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[2018-09-12 08:40:02] requinix@php.net
My go-to tool is strace. Tee the (preferably timestamp-prefixed) output to a log you can review, but
when it's running you can watch the output go past and it should be obvious when it stalls.
------------------------------------------------------------------------
[2018-09-12 08:38:46] spam2 at rhsoft dot net
[root@rh:~]$ strace php -v
execve("/usr/bin/php", ["php", "-v"], 0x7ffd1f12fe58 /* 32 vars */) =
0
brk(NULL) = 0x55ef8e731000
brk(0x55ef8e731026) = 0x55ef8e731026
brk(NULL) = 0x55ef8e731026
access("/etc/ld.so.preload", R_OK) = -1 ENOENT (Datei oder Verzeichnis nicht
gefunden)
openat(AT_FDCWD, "/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=111591, ...}) = 0
mmap(NULL, 111591, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f89b25eb000
close(3) = 0
openat(AT_FDCWD, "/lib64/libpthread.so.0", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0Pb\0\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=154128, ...}) = 0
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f89b25e9000
mmap(NULL, 2221184, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f89b21c2000
mprotect(0x7f89b21db000, 2097152, PROT_NONE) = 0
mmap(0x7f89b23db000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x19000) =
0x7f89b23db000
mmap(0x7f89b23dd000, 13440, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) =
0x7f89b23dd000
close(3) = 0
openat(AT_FDCWD, "/lib64/libresolv.so.2", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0@8\0\0\0\0\0\0"..., 832) = 832
fstat(3, {st_mode=S_IFREG|0755, st_size=98144, ...}) = 0
mmap(NULL, 2189952, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f89b1fab000
mprotect(0x7f89b1fbe000, 2097152, PROT_NONE) = 0
................
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