pcode cache does not work

[soff@…]

xcache.size = 64M xcache.count = 4 xcache.slots = 8K xcache.var_size = 0 xcache.var_count = 1 xcache.var_slots = 8K xcache.test = Off xcache.readonly_protection = Off xcache.mmap_path = "/tmp/xcache"

[12-Jun-2006 23:03:54] PHP Fatal error: XCache: Cannot create shm in Unknown on line 0 [12-Jun-2006 23:03:54] PHP Fatal error: XCache: Cannot init in Unknown on line 0 [12-Jun-2006 23:03:54] PHP Fatal error: Unable to start XCache module in Unknown on line 0

[moo]

it is possible that your sysctl (if linux) limit the mmap size. you may try to lower xcache.size to 4M or so and check if it works, then try to config your kernel, use sysctl or so (not rebuild, i guess)

[anonymous]

I cannot also activate xcache when I set 'xcache.mmap_path = "/tmp/xcache"'.

% php-cgi -i
PHP Fatal error:  XCache: Cannot create shm in Unknown on line 0
PHP Fatal error:  XCache: Cannot init in Unknown on line 0
PHP Fatal error:  Unable to start XCache module in Unknown on line 0

I tried on Gentoo linux (php-5.1.4) and Debian sarge (php-4.3.10-16), but in vain.

xcache.cacher = On
xcache.size = 4M
xcache.count = 1
xcache.optimizer = On
xcache.mmap_path = "/tmp/xcache"
xcache.var_size = 4M
xcache.var_count = 1

% sysctl -a | grep shm
kernel.shmmni = 4096
kernel.shmall = 2097152
kernel.shmmax = 33554432

With eaccelerator, I can set 'eaccelerator.shm_size="28"' and there is no problem.

[soff@…]

well, the same with me.

# sysctl -a | grep shm kernel.shmmni = 4096 kernel.shmall = 2097152 kernel.shmmax = 33554432

eaccelerator.shm_size="16" has no problem.

[ich@…]

a strace:

open("/srv/lighttpd/php/lib/php/extensions/no-debug-non-zts-20050922/xcache.so", O_RDONLY) = 3 read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0\340B\0"..., 512) = 512 fstat64(3, {st_mode=S_IFREG|0755, st_size=398063, ...}) = 0 old_mmap(NULL, 68848, PROT_READ|PROT_EXEC, MAP_PRIVATE, 3, 0) = 0xb79ec000 old_mmap(0xb79fc000, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED, 3, 0x10000) = 0xb79fc000 close(3) = 0 futex(0xb7c90d5c, FUTEX_WAKE, 2147483647) = 0 brk(0) = 0x83fa000 brk(0x841b000) = 0x841b000 brk(0) = 0x841b000 brk(0x843c000) = 0x843c000 brk(0) = 0x843c000 brk(0x845d000) = 0x845d000 brk(0) = 0x845d000 brk(0x847e000) = 0x847e000 open("/tmp/xcache", O_RDWR) = -1 EISDIR (Is a directory) open("/tmp/xcache", O_RDWR|O_CREAT, 0600) = -1 EISDIR (Is a directory) open("/logs/lighthttpd/error_php.log", O_WRONLY|O_APPEND|O_CREAT, 0666) = -1 ENOENT (No such file or directory) write(2, "PHP Fatal error: XCache: Cannot"..., 65) = 65 open("/logs/lighthttpd/error_php.log", O_WRONLY|O_APPEND|O_CREAT, 0666) = -1 ENOENT (No such file or directory) write(2, "PHP Fatal error: XCache: Cannot"..., 59) = 59 open("/logs/lighthttpd/error_php.log", O_WRONLY|O_APPEND|O_CREAT, 0666) = -1 ENOENT (No such file or directory) write(2, "PHP Fatal error: Unable to star"..., 69) = 69 exit_group(-2) =

do not create a xcache dir by yourself. If you created it please delete it and xcache works :).

open("/tmp/xcache", O_RDWR) = -1 ENOENT (No such file or directory) open("/tmp/xcache", O_RDWR|O_CREAT, 0600) = 3 ftruncate(3, 33554432) = 0 mmap2(NULL, 33554432, PROT_READ|PROT_WRITE, MAP_SHARED, 3, 0) = 0xb596f000 munmap(0, 33554432) = 0 close(3) = 0 unlink("/tmp/xcache") = 0 getuid32() = 0 open("/tmp/.xcache.0.0.1804289383.lock", O_RDWR|O_CREAT, 0666) = 3 unlink("/tmp/.xcache.0.0.1804289383.lock") = 0 setitimer(ITIMER_PROF, {it_interval={0, 0}, it_value={60, 0}}, NULL) = 0 rt_sigaction(SIGPROF, {0x822e3a0, [PROF], SA_RESTART}, {SIG_DFL}, 8) = 0 rt_sigprocmask(SIG_UNBLOCK, [PROF], NULL, 8) = 0 time(NULL) = 1150459866 gettimeofday({1150459866, 351317}, NULL) = 0 getpid() = 21678 time(NULL) = 1150459866 write(1, "PHP 5.1.4 (cgi-fcgi) (built: May"..., 205) = 205 exit_group(0) = ?

[anonymous]

do not create a xcache dir by yourself. If you created it please delete it and xcache works :).

Thanks ich@toby. It works. It seems the directory which set to 'xcache.mmap_path' is created and deleted by xcache itself. I think this should be described in the documents (FAQ?).

And if 'xcache.mmap_path' is set other than /tmp directory and programs execute as a normal user, the permission of the parent directory may also be a problem.

[moo]

thank you guys, you it fixed yourself. i'll update doc/wiki somewhere. :)

[moo]

in wiki/PhpIni