We are having issues with fork() failing sporadically -- but we can't
figure what resource is short supply.
This shows we still have 45 meg of ram available.
rhd </home/tms/src/systest>$ free -m
total used free shared buffers cached
Mem: 123 113 9 0 4 30
-/+ buffers/cache: 78 45
Swap: 250 19 231
This is the strace output from a test program. Can anybody suggest how
to tell which kernel parameter is in short supply?
rhd </home/tms/src/systest>$ strace -f -ores forktest 3
fork failed, errno 12
rhd </home/tms/src/systest>$
rhd </home/tms/src/systest>$ cat res
4042 execve("./forktest", ["forktest", "3"], [/* 26 vars */]) = 0
4042 uname({sys="Linux", node="rhd", ...}) = 0
4042 brk(0) = 0x80497dc
4042 open("/etc/ld.so.preload", O_RDONLY) = -1 ENOENT (No such file or directory)
4042 open("/etc/ld.so.cache", O_RDONLY) = 3
4042 fstat64(3, {st_mode=S_IFREG|0644, st_size=48658, ...}) = 0
4042 old_mmap(NULL, 48658, PROT_READ, MAP_PRIVATE, 3, 0) = 0x40014000
4042 close(3) = 0
4042 open("/lib/i686/libc.so.6", O_RDONLY) = 3
4042 read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0\260Y\1"..., 512) = 512
4042 fstat64(3, {st_mode=S_IFREG|0755, st_size=1452984, ...}) = 0
4042 old_mmap(0x42000000, 1290052, PROT_READ|PROT_EXEC, MAP_PRIVATE, 3, 0) = 0x42000000
4042 old_mmap(0x42134000, 20480, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED, 3, 0x134000) = 0x42134000
4042 old_mmap(0x42139000, 8004, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x42139000
4042 close(3) = 0
4042 old_mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x40020000
4042 munmap(0x40014000, 48658) = 0
4042 mmap2(NULL, 1052672, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x40021000
4042 fork() = -1 ENOMEM (Cannot allocate memory)
4042 fstat64(1, {st_mode=S_IFCHR|0620, st_rdev=makedev(136, 0), ...}) = 0
4042 mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x40014000
4042 write(1, "fork failed, errno 12\n", 22) = 22
4042 munmap(0x40014000, 4096) = 0
4042 _exit(22) = ?
rhd </home/tms/src/systest>$
Thanks - Tom
-----Tom Stevelt--------------------Victory Wholesale Grocers-----------
tms@xxxxxxx 400 Victory Drive
513-746-1742 ext 1224 Springboro, OH 45066
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