Kaz, sorry for the "[OT]" but I prefer it that way;-)
Stephen Sprunk said:
That is apparently how long it takes for the kernel on his system to
find backing for all those pages. I suspect that delay is why
overcommitment is on by default.
I now see what you meant in you're earlier post, but - as a
completely unscientific experiment - switching off overcom-
mitment doesn't seem to make any difference on my system.
The (admittedly short and thus a bit dubious) times seem to
stay more or less exactly what they were before (i.e. about
15 ms when initializing the memory and 2.5 ms without). I'm
also still a bit puzzled why it could take the kernel nearly
1 second to find backing store on the system the OP seems to
have - I don't know the clock speed, but it seems to have
amounts of memory similar to mine (both 8 GB) and even a
newer CPU (Intel i7 versus "only" an i5 here). Of course,
this all could also be due to differences in the kernel ver-
sions used...
First of all, sorry to everyone who complained about my sub-optimal
choice of usenet group. I only ended up here because Google found the
previous thread on fork() and overcommit in this group.
BTW, the overcommit setting at my mysteriously slow fork() Core i7
machine is the default 0:
more /proc/sys/vm/overcommit_memory
0
Also, Kaz Kylheku was right: I was premature to blame the kernel. I
now upgraded to the latest CentOS Kernel 2.6.18-274.12.1.el5 (problem
persists), and installed the same Linux distro on another machine, but
everything was fine there.
So we now got same Linux Distro, same kernel 2.6.18-274.12.1.el5 #1
SMP Tue Nov 29 13:37:46 EST 2011 x86_64, and..
Core i7, 2.8GHz, 8GB RAM/20GB Swap: slow fork()
Opteron 1.8GHz, 2GB RAM/4GB Swap: fast fork()
I also shut down the X-server, since the Core i7 uses nVIDIA's
proprietary driver, and the Opteron AMD's proprietary driver. But the
Core i7 forks equally slow at runlevel 3.
Kaz Kylheku also suggested to use 'strace -f -r', which I did
(attached at the end for the slow forker).
Comparison between the slow and the fast forker shows that 'mmap' is
to be blamed (even without the timing info, one sees the output hang
at mmap for a second).
slow with memset:
0.000571 mmap(NULL, 524292096, PROT_READ|PROT_WRITE, MAP_PRIVATE|
MAP_ANONYMOUS, -1, 0) = 0x2b86fb5cc000
1.631431 rt_sigaction(SIGINT, {0x1, [], SA_RESTORER,
0x348a2302d0}, {SIG_DFL, [], 0}, 8) = 0
fast without memset:
0.000595 mmap(NULL, 524292096, PROT_READ|PROT_WRITE, MAP_PRIVATE|
MAP_ANONYMOUS, -1, 0) = 0x2b0bb57a4000
0.000194 rt_sigaction(SIGINT, {0x1, [], SA_RESTORER,
0x348a2302d0}, {SIG_DFL, [], 0}, 8) = 0
Complete output:
$ strace -f -r a.out
0.000000 execve("./a.out", ["a.out"], [/* 49 vars */]) = 0
0.001729 brk(0) = 0xf699000
0.000222 mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|
MAP_ANONYMOUS, -1, 0) = 0x2b86fb59b000
0.000323 mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|
MAP_ANONYMOUS, -1, 0) = 0x2b86fb59c000
0.000190 access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such
file or directory)
0.000333 open("/etc/ld.so.cache", O_RDONLY) = 3
0.000157 fstat(3, {st_mode=S_IFREG|0644, st_size=187712, ...}) =
0
0.000280 mmap(NULL, 187712, PROT_READ, MAP_PRIVATE, 3, 0) =
0x2b86fb59d000
0.000165 close(3) = 0
0.000251 open("/lib64/libc.so.6", O_RDONLY) = 3
0.000136 read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>
\0\1\0\0\0\220\332!\2124\0\0\0"..., 832) = 832
0.000211 fstat(3, {st_mode=S_IFREG|0755, st_size=1722304, ...}) =
0
0.000372 mmap(0x348a200000, 3502424, PROT_READ|PROT_EXEC,
MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x348a200000
0.000120 mprotect(0x348a34e000, 2097152, PROT_NONE) = 0
0.000134 mmap(0x348a54e000, 20480, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x14e000) = 0x348a54e000
0.000255 mmap(0x348a553000, 16728, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x348a553000
0.000169 close(3) = 0
0.000184 mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|
MAP_ANONYMOUS, -1, 0) = 0x2b86fb5cb000
0.000182 arch_prctl(ARCH_SET_FS, 0x2b86fb5cb6e0) = 0
0.000459 mprotect(0x348a54e000, 16384, PROT_READ) = 0
0.000141 mprotect(0x348a01c000, 4096, PROT_READ) = 0
0.000146 munmap(0x2b86fb59d000, 187712) = 0
0.000571 mmap(NULL, 524292096, PROT_READ|PROT_WRITE, MAP_PRIVATE|
MAP_ANONYMOUS, -1, 0) = 0x2b86fb5cc000
1.631431 rt_sigaction(SIGINT, {0x1, [], SA_RESTORER,
0x348a2302d0}, {SIG_DFL, [], 0}, 8) = 0
0.000381 rt_sigaction(SIGQUIT, {0x1, [], SA_RESTORER,
0x348a2302d0}, {SIG_DFL, [], 0}, 8) = 0
0.000212 rt_sigprocmask(SIG_BLOCK, [CHLD], [], 8) = 0
0.000122 clone(Process 25300 attached (waiting for parent)
Process 25300 resumed (parent 25263 ready)
child_stack=0, flags=CLONE_PARENT_SETTID|SIGCHLD,
parent_tidptr=0x7fff8ab7c538) = 25300
[pid 25300] 0.436593 rt_sigaction(SIGINT, {SIG_DFL, [],
SA_RESTORER, 0x348a2302d0}, <unfinished ...>
[pid 25263] 0.000055 wait4(25300, Process 25263 suspended
<unfinished ...>
[pid 25300] 0.000009 <... rt_sigaction resumed> NULL, 8) = 0
[pid 25300] 0.000020 rt_sigaction(SIGQUIT, {SIG_DFL, [],
SA_RESTORER, 0x348a2302d0}, NULL, 8) = 0
[pid 25300] 0.000063 rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
[pid 25300] 0.000072 execve("/bin/sh", ["sh", "-c", "ls Hello"],
[/* 49 vars */]) = 0
[pid 25300] 0.451537 brk(0) = 0xfde2000
[pid 25300] 0.000114 mmap(NULL, 4096, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x2b228a067000
[pid 25300] 0.000140 mmap(NULL, 4096, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x2b228a068000
[pid 25300] 0.000061 access("/etc/ld.so.preload", R_OK) = -1
ENOENT (No such file or directory)
[pid 25300] 0.000129 open("/etc/ld.so.cache", O_RDONLY) = 3
[pid 25300] 0.000050 fstat(3, {st_mode=S_IFREG|0644,
st_size=187712, ...}) = 0
[pid 25300] 0.000177 mmap(NULL, 187712, PROT_READ, MAP_PRIVATE,
3, 0) = 0x2b228a069000
[pid 25300] 0.000055 close(3) = 0
[pid 25300] 0.000162 open("/lib64/libtermcap.so.2", O_RDONLY) = 3
[pid 25300] 0.000073 read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>
\0\1\0\0\0@\17\240\2154\0\0\0"..., 832) = 832
[pid 25300] 0.000090 fstat(3, {st_mode=S_IFREG|0755,
st_size=15584, ...}) = 0
[pid 25300] 0.000186 mmap(0x348da00000, 2108688, PROT_READ|
PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x348da00000
[pid 25300] 0.000052 mprotect(0x348da03000, 2093056, PROT_NONE) =
0
[pid 25300] 0.000056 mmap(0x348dc02000, 4096, PROT_READ|
PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x2000) =
0x348dc02000
[pid 25300] 0.000089 close(3) = 0
[pid 25300] 0.000125 open("/lib64/libdl.so.2", O_RDONLY) = 3
[pid 25300] 0.000063 read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>
\0\1\0\0\0\20\16\240\2124\0\0\0"..., 832) = 832
[pid 25300] 0.000079 fstat(3, {st_mode=S_IFREG|0755,
st_size=23360, ...}) = 0
[pid 25300] 0.000172 mmap(0x348aa00000, 2109696, PROT_READ|
PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x348aa00000
[pid 25300] 0.000042 mprotect(0x348aa02000, 2097152, PROT_NONE) =
0
[pid 25300] 0.000032 mmap(0x348ac02000, 8192, PROT_READ|
PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x2000) =
0x348ac02000
[pid 25300] 0.000071 close(3) = 0
[pid 25300] 0.000098 open("/lib64/libc.so.6", O_RDONLY) = 3
[pid 25300] 0.000058 read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>
\0\1\0\0\0\220\332!\2124\0\0\0"..., 832) = 832
[pid 25300] 0.000094 fstat(3, {st_mode=S_IFREG|0755,
st_size=1722304, ...}) = 0
[pid 25300] 0.000180 mmap(0x348a200000, 3502424, PROT_READ|
PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x348a200000
[pid 25300] 0.000034 mprotect(0x348a34e000, 2097152, PROT_NONE) =
0
[pid 25300] 0.000051 mmap(0x348a54e000, 20480, PROT_READ|
PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x14e000) =
0x348a54e000
[pid 25300] 0.000065 mmap(0x348a553000, 16728, PROT_READ|
PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x348a553000
[pid 25300] 0.000065 close(3) = 0
[pid 25300] 0.000084 mmap(NULL, 4096, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x2b228a097000
[pid 25300] 0.000104 mmap(NULL, 4096, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x2b228a098000
[pid 25300] 0.000035 arch_prctl(ARCH_SET_FS, 0x2b228a097f50) = 0
[pid 25300] 0.000078 mprotect(0x348ac02000, 4096, PROT_READ) = 0
[pid 25300] 0.000030 mprotect(0x348a54e000, 16384, PROT_READ) = 0
[pid 25300] 0.000044 mprotect(0x348a01c000, 4096, PROT_READ) = 0
[pid 25300] 0.000076 munmap(0x2b228a069000, 187712) = 0
[pid 25300] 0.000409 rt_sigprocmask(SIG_BLOCK, NULL, [], 8) = 0
[pid 25300] 0.000063 open("/dev/tty", O_RDWR|O_NONBLOCK) = 3
[pid 25300] 0.000067 close(3) = 0
[pid 25300] 0.000557 brk(0) = 0xfde2000
[pid 25300] 0.000045 brk(0xfe03000) = 0xfe03000
[pid 25300] 0.000091 open("/usr/lib/locale/locale-archive",
O_RDONLY) = 3
[pid 25300] 0.000105 fstat(3, {st_mode=S_IFREG|0644,
st_size=56426032, ...}) = 0
[pid 25300] 0.000171 mmap(NULL, 56426032, PROT_READ, MAP_PRIVATE,
3, 0) = 0x2b228a099000
[pid 25300] 0.000054 close(3) = 0
[pid 25300] 0.000220 getuid() = 500
[pid 25300] 0.000031 getgid() = 500
[pid 25300] 0.000034 geteuid() = 500
[pid 25300] 0.000038 getegid() = 500
[pid 25300] 0.000088 rt_sigprocmask(SIG_BLOCK, NULL, [], 8) = 0
[pid 25300] 0.000316 open("/proc/meminfo", O_RDONLY) = 3
[pid 25300] 0.000168 fstat(3, {st_mode=S_IFREG|0444,
st_size=0, ...}) = 0
[pid 25300] 0.000165 mmap(NULL, 4096, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x2b228d669000
[pid 25300] 0.000062 read(3, "MemTotal: 8168624 kB
\nMemFre"..., 1024) = 777
[pid 25300] 0.000235 close(3) = 0
[pid 25300] 0.000043 munmap(0x2b228d669000, 4096) = 0
[pid 25300] 0.000217 rt_sigaction(SIGCHLD, {SIG_DFL, [],
SA_RESTORER, 0x348a2302d0}, {SIG_DFL, [], 0}, 8) = 0
[pid 25300] 0.000099 rt_sigaction(SIGCHLD, {SIG_DFL, [],
SA_RESTORER, 0x348a2302d0}, {SIG_DFL, [], SA_RESTORER, 0x348a2302d0},
8) = 0
[pid 25300] 0.000121 rt_sigaction(SIGINT, {SIG_DFL, [],
SA_RESTORER, 0x348a2302d0}, {SIG_DFL, [], 0}, 8) = 0
[pid 25300] 0.000100 rt_sigaction(SIGINT, {SIG_DFL, [],
SA_RESTORER, 0x348a2302d0}, {SIG_DFL, [], SA_RESTORER, 0x348a2302d0},
8) = 0
[pid 25300] 0.000111 rt_sigaction(SIGQUIT, {SIG_DFL, [],
SA_RESTORER, 0x348a2302d0}, {SIG_DFL, [], 0}, 8) = 0
[pid 25300] 0.000096 rt_sigaction(SIGQUIT, {SIG_DFL, [],
SA_RESTORER, 0x348a2302d0}, {SIG_DFL, [], SA_RESTORER, 0x348a2302d0},
8) = 0
[pid 25300] 0.000098 rt_sigprocmask(SIG_BLOCK, NULL, [], 8) = 0
[pid 25300] 0.000044 rt_sigaction(SIGQUIT, {0x1, [], SA_RESTORER,
0x348a2302d0}, {SIG_DFL, [], SA_RESTORER, 0x348a2302d0}, 8) = 0
[pid 25300] 0.000122 uname({sys="Linux", node="yasara3", ...}) =
0
[pid 25300] 0.000551 stat("/home/elmar/python", {st_mode=S_IFDIR|
0777, st_size=36864, ...}) = 0
[pid 25300] 0.000183 stat(".", {st_mode=S_IFDIR|0777,
st_size=36864, ...}) = 0
[pid 25300] 0.000178 getpid() = 25300
[pid 25300] 0.000115 open("/usr/lib64/gconv/gconv-modules.cache",
O_RDONLY) = 3
[pid 25300] 0.000103 fstat(3, {st_mode=S_IFREG|0644,
st_size=25464, ...}) = 0
[pid 25300] 0.000157 mmap(NULL, 25464, PROT_READ, MAP_SHARED, 3,
0) = 0x2b228d669000
[pid 25300] 0.000049 close(3) = 0
[pid 25300] 0.000136 getppid() = 25263
[pid 25300] 0.000071 stat(".", {st_mode=S_IFDIR|0777,
st_size=36864, ...}) = 0
[pid 25300] 0.000198 stat("/usr/kerberos/sbin/sh",
0x7fff8049aef0) = -1 ENOENT (No such file or directory)
[pid 25300] 0.000078 stat("/usr/kerberos/bin/sh", 0x7fff8049aef0)
= -1 ENOENT (No such file or directory)
[pid 25300] 0.000062 stat("/usr/local/bin/sh", 0x7fff8049aef0) =
-1 ENOENT (No such file or directory)
[pid 25300] 0.000069 stat("/usr/bin/sh", 0x7fff8049aef0) = -1
ENOENT (No such file or directory)
[pid 25300] 0.000073 stat("/bin/sh", {st_mode=S_IFREG|0755,
st_size=801528, ...}) = 0
[pid 25300] 0.000161 access("/bin/sh", X_OK) = 0
[pid 25300] 0.000053 access("/bin/sh", R_OK) = 0
[pid 25300] 0.000042 stat("/bin/sh", {st_mode=S_IFREG|0755,
st_size=801528, ...}) = 0
[pid 25300] 0.000165 access("/bin/sh", X_OK) = 0
[pid 25300] 0.000053 access("/bin/sh", R_OK) = 0
[pid 25300] 0.000177 getpgrp() = 25262
[pid 25300] 0.000042 rt_sigaction(SIGCHLD, {0x436360, [],
SA_RESTORER, 0x348a2302d0}, {SIG_DFL, [], SA_RESTORER, 0x348a2302d0},
8) = 0
[pid 25300] 0.000407 rt_sigprocmask(SIG_BLOCK, NULL, [], 8) = 0
[pid 25300] 0.000050 rt_sigprocmask(SIG_BLOCK, NULL, [], 8) = 0
[pid 25300] 0.000104 rt_sigprocmask(SIG_BLOCK, NULL, [], 8) = 0
[pid 25300] 0.000289 stat(".", {st_mode=S_IFDIR|0777,
st_size=36864, ...}) = 0
[pid 25300] 0.000179 stat("/usr/kerberos/sbin/ls",
0x7fff8049adb0) = -1 ENOENT (No such file or directory)
[pid 25300] 0.000064 stat("/usr/kerberos/bin/ls", 0x7fff8049adb0)
= -1 ENOENT (No such file or directory)
[pid 25300] 0.000072 stat("/usr/local/bin/ls", 0x7fff8049adb0) =
-1 ENOENT (No such file or directory)
[pid 25300] 0.000062 stat("/usr/bin/ls", 0x7fff8049adb0) = -1
ENOENT (No such file or directory)
[pid 25300] 0.000051 stat("/bin/ls", {st_mode=S_IFREG|0755,
st_size=91272, ...}) = 0
[pid 25300] 0.000190 access("/bin/ls", X_OK) = 0
[pid 25300] 0.000032 access("/bin/ls", R_OK) = 0
[pid 25300] 0.000036 stat("/bin/ls", {st_mode=S_IFREG|0755,
st_size=91272, ...}) = 0
[pid 25300] 0.000179 access("/bin/ls", X_OK) = 0
[pid 25300] 0.000042 access("/bin/ls", R_OK) = 0
[pid 25300] 0.000049 rt_sigaction(SIGINT, {SIG_DFL, [],
SA_RESTORER, 0x348a2302d0}, {SIG_DFL, [], SA_RESTORER, 0x348a2302d0},
8) = 0
[pid 25300] 0.000108 rt_sigaction(SIGQUIT, {SIG_DFL, [],
SA_RESTORER, 0x348a2302d0}, {0x1, [], SA_RESTORER, 0x348a2302d0}, 8) =
0
[pid 25300] 0.000105 rt_sigaction(SIGCHLD, {SIG_DFL, [],
SA_RESTORER, 0x348a2302d0}, {0x436360, [], SA_RESTORER, 0x348a2302d0},
8) = 0
[pid 25300] 0.000110 execve("/bin/ls", ["ls", "Hello"], [/* 48
vars */]) = 0
[pid 25300] 0.002655 brk(0) = 0x3052000
[pid 25300] 0.000086 mmap(NULL, 4096, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x2af0fbafe000
[pid 25300] 0.000153 mmap(NULL, 4096, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x2af0fbaff000
[pid 25300] 0.000068 access("/etc/ld.so.preload", R_OK) = -1
ENOENT (No such file or directory)
[pid 25300] 0.000108 open("/etc/ld.so.cache", O_RDONLY) = 3
[pid 25300] 0.000059 fstat(3, {st_mode=S_IFREG|0644,
st_size=187712, ...}) = 0
[pid 25300] 0.000238 mmap(NULL, 187712, PROT_READ, MAP_PRIVATE,
3, 0) = 0x2af0fbb00000
[pid 25300] 0.000037 close(3) = 0
[pid 25300] 0.000169 open("/lib64/librt.so.1", O_RDONLY) = 3
[pid 25300] 0.000061 read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>
\0\1\0\0\0 \"\240\2164\0\0\0"..., 832) = 832
[pid 25300] 0.000077 fstat(3, {st_mode=S_IFREG|0755,
st_size=53448, ...}) = 0
[pid 25300] 0.000158 mmap(0x348ea00000, 2132936, PROT_READ|
PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x348ea00000
[pid 25300] 0.000044 mprotect(0x348ea07000, 2097152, PROT_NONE) =
0
[pid 25300] 0.000042 mmap(0x348ec07000, 8192, PROT_READ|
PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x7000) =
0x348ec07000
[pid 25300] 0.000131 close(3) = 0
[pid 25300] 0.000139 open("/lib64/libacl.so.1", O_RDONLY) = 3
[pid 25300] 0.000059 read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>
\0\1\0\0\0\240\30@\2234\0\0\0"..., 832) = 832
[pid 25300] 0.000080 fstat(3, {st_mode=S_IFREG|0755,
st_size=27920, ...}) = 0
[pid 25300] 0.000156 mmap(0x3493400000, 2120904, PROT_READ|
PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x3493400000
[pid 25300] 0.000041 mprotect(0x3493406000, 2093056, PROT_NONE) =
0
[pid 25300] 0.000036 mmap(0x3493605000, 4096, PROT_READ|
PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x5000) =
0x3493605000
[pid 25300] 0.000062 close(3) = 0
[pid 25300] 0.000052 open("/lib64/libselinux.so.1", O_RDONLY) = 3
[pid 25300] 0.000061 read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>
\0\1\0\0\0\340E`\2214\0\0\0"..., 832) = 832
[pid 25300] 0.000066 fstat(3, {st_mode=S_IFREG|0755,
st_size=95464, ...}) = 0
[pid 25300] 0.000185 mmap(0x3491600000, 2192800, PROT_READ|
PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x3491600000
[pid 25300] 0.000041 mprotect(0x3491615000, 2097152, PROT_NONE) =
0
[pid 25300] 0.000030 mmap(0x3491815000, 8192, PROT_READ|
PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x15000) =
0x3491815000
[pid 25300] 0.000076 mmap(0x3491817000, 1440, PROT_READ|
PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x3491817000
[pid 25300] 0.000063 close(3) = 0
[pid 25300] 0.000081 open("/lib64/libc.so.6", O_RDONLY) = 3
[pid 25300] 0.000066 read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>
\0\1\0\0\0\220\332!\2124\0\0\0"..., 832) = 832
[pid 25300] 0.000078 fstat(3, {st_mode=S_IFREG|0755,
st_size=1722304, ...}) = 0
[pid 25300] 0.000160 mmap(NULL, 4096, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x2af0fbb2e000
[pid 25300] 0.000047 mmap(0x348a200000, 3502424, PROT_READ|
PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x348a200000
[pid 25300] 0.000041 mprotect(0x348a34e000, 2097152, PROT_NONE) =
0
[pid 25300] 0.000030 mmap(0x348a54e000, 20480, PROT_READ|
PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x14e000) =
0x348a54e000
[pid 25300] 0.000081 mmap(0x348a553000, 16728, PROT_READ|
PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x348a553000
[pid 25300] 0.000061 close(3) = 0
[pid 25300] 0.000080 open("/lib64/libpthread.so.0", O_RDONLY) = 3
[pid 25300] 0.000073 read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>
\0\1\0\0\0\240W\340\2124\0\0\0"..., 832) = 832
[pid 25300] 0.000084 fstat(3, {st_mode=S_IFREG|0755,
st_size=145824, ...}) = 0
[pid 25300] 0.000155 mmap(0x348ae00000, 2204528, PROT_READ|
PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x348ae00000
[pid 25300] 0.000041 mprotect(0x348ae16000, 2093056, PROT_NONE) =
0
[pid 25300] 0.000032 mmap(0x348b015000, 8192, PROT_READ|
PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x15000) =
0x348b015000
[pid 25300] 0.000058 mmap(0x348b017000, 13168, PROT_READ|
PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x348b017000
[pid 25300] 0.000063 close(3) = 0
[pid 25300] 0.000073 open("/lib64/libattr.so.1", O_RDONLY) = 3
[pid 25300] 0.000088 read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>
\0\1\0\0\0\320\17\300\2254\0\0\0"..., 832) = 832
[pid 25300] 0.000085 fstat(3, {st_mode=S_IFREG|0755,
st_size=17888, ...}) = 0
[pid 25300] 0.000155 mmap(0x3495c00000, 2110728, PROT_READ|
PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x3495c00000
[pid 25300] 0.000030 mprotect(0x3495c04000, 2093056, PROT_NONE) =
0
[pid 25300] 0.000042 mmap(0x3495e03000, 4096, PROT_READ|
PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x3000) =
0x3495e03000
[pid 25300] 0.000066 close(3) = 0
[pid 25300] 0.000109 open("/lib64/libdl.so.2", O_RDONLY) = 3
[pid 25300] 0.000075 read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>
\0\1\0\0\0\20\16\240\2124\0\0\0"..., 832) = 832
[pid 25300] 0.000070 fstat(3, {st_mode=S_IFREG|0755,
st_size=23360, ...}) = 0
[pid 25300] 0.000156 mmap(NULL, 4096, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x2af0fbb2f000
[pid 25300] 0.000045 mmap(0x348aa00000, 2109696, PROT_READ|
PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x348aa00000
[pid 25300] 0.000042 mprotect(0x348aa02000, 2097152, PROT_NONE) =
0
[pid 25300] 0.000030 mmap(0x348ac02000, 8192, PROT_READ|
PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x2000) =
0x348ac02000
[pid 25300] 0.000094 close(3) = 0
[pid 25300] 0.000050 open("/lib64/libsepol.so.1", O_RDONLY) = 3
[pid 25300] 0.000054 read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>
\0\1\0\0\0@= \2214\0\0\0"..., 832) = 832
[pid 25300] 0.000074 fstat(3, {st_mode=S_IFREG|0755,
st_size=247496, ...}) = 0
[pid 25300] 0.000168 mmap(0x3491200000, 2383168, PROT_READ|
PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x3491200000
[pid 25300] 0.000043 mprotect(0x349123b000, 2097152, PROT_NONE) =
0
[pid 25300] 0.000036 mmap(0x349143b000, 4096, PROT_READ|
PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x3b000) =
0x349143b000
[pid 25300] 0.000099 mmap(0x349143c000, 40256, PROT_READ|
PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x349143c000
[pid 25300] 0.000048 close(3) = 0
[pid 25300] 0.000134 mmap(NULL, 4096, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x2af0fbb30000
[pid 25300] 0.000070 mmap(NULL, 4096, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x2af0fbb31000
[pid 25300] 0.000045 arch_prctl(ARCH_SET_FS, 0x2af0fbb30e20) = 0
[pid 25300] 0.000130 mprotect(0x348ec07000, 4096, PROT_READ) = 0
[pid 25300] 0.000036 mprotect(0x348a54e000, 16384, PROT_READ) = 0
[pid 25300] 0.000028 mprotect(0x348b015000, 4096, PROT_READ) = 0
[pid 25300] 0.000037 mprotect(0x348a01c000, 4096, PROT_READ) = 0
[pid 25300] 0.000037 mprotect(0x348ac02000, 4096, PROT_READ) = 0
[pid 25300] 0.000056 munmap(0x2af0fbb00000, 187712) = 0
[pid 25300] 0.000281 set_tid_address(0x2af0fbb30eb0) = 25300
[pid 25300] 0.000020 set_robust_list(0x2af0fbb30ec0, 0x18) = 0
[pid 25300] 0.000026 futex(0x7fff2b1bab2c, FUTEX_WAKE_PRIVATE, 1)
= 0
[pid 25300] 0.000107 rt_sigaction(SIGRTMIN, {0x348ae05380, [],
SA_RESTORER|SA_SIGINFO, 0x348ae0eb70}, NULL, 8) = 0
[pid 25300] 0.000075 rt_sigaction(SIGRT_1, {0x348ae052b0, [],
SA_RESTORER|SA_RESTART|SA_SIGINFO, 0x348ae0eb70}, NULL, 8) = 0
[pid 25300] 0.000074 rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1],
NULL, 8) = 0
[pid 25300] 0.000061 getrlimit(RLIMIT_STACK,
{rlim_cur=10240*1024, rlim_max=RLIM_INFINITY}) = 0
[pid 25300] 0.000312 access("/etc/selinux/", F_OK) = 0
[pid 25300] 0.000431 brk(0) = 0x3052000
[pid 25300] 0.000045 brk(0x3073000) = 0x3073000
[pid 25300] 0.000086 open("/etc/selinux/config", O_RDONLY) = 3
[pid 25300] 0.000151 fstat(3, {st_mode=S_IFREG|0644,
st_size=511, ...}) = 0
[pid 25300] 0.000167 mmap(NULL, 4096, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x2af0fbb00000
[pid 25300] 0.000033 read(3, "# This file controls the state
o"..., 4096) = 511
[pid 25300] 0.000151 read(3, "", 4096) = 0
[pid 25300] 0.000055 close(3) = 0
[pid 25300] 0.000033 munmap(0x2af0fbb00000, 4096) = 0
[pid 25300] 0.000226 open("/proc/mounts", O_RDONLY) = 3
[pid 25300] 0.000163 fstat(3, {st_mode=S_IFREG|0444,
st_size=0, ...}) = 0
[pid 25300] 0.000159 mmap(NULL, 4096, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x2af0fbb00000
[pid 25300] 0.000033 read(3, "rootfs / rootfs rw 0 0\n/dev/
root"..., 1024) = 546
[pid 25300] 0.000114 read(3, "", 1024) = 0
[pid 25300] 0.000026 close(3) = 0
[pid 25300] 0.000041 munmap(0x2af0fbb00000, 4096) = 0
[pid 25300] 0.000296 open("/usr/lib/locale/locale-archive",
O_RDONLY) = 3
[pid 25300] 0.000084 fstat(3, {st_mode=S_IFREG|0644,
st_size=56426032, ...}) = 0
[pid 25300] 0.000156 mmap(NULL, 56426032, PROT_READ, MAP_PRIVATE,
3, 0) = 0x2af0fbb32000
[pid 25300] 0.000060 close(3) = 0
[pid 25300] 0.000206 ioctl(1, SNDCTL_TMR_TIMEBASE or TCGETS,
{B38400 opost isig icanon echo ...}) = 0
[pid 25300] 0.000160 ioctl(1, TIOCGWINSZ, {ws_row=25, ws_col=80,
ws_xpixel=0, ws_ypixel=0}) = 0
[pid 25300] 0.000127 stat("Hello", 0x30535e8) = -1 ENOENT (No
such file or directory)
[pid 25300] 0.000044 lstat("Hello", 0x30535e8) = -1 ENOENT (No
such file or directory)
[pid 25300] 0.000112 write(2, "ls: ", 4ls: ) = 4
[pid 25300] 0.000051 write(2, "Hello", 5Hello) = 5
[pid 25300] 0.000097 open("/usr/share/locale/locale.alias",
O_RDONLY) = 3
[pid 25300] 0.000080 fstat(3, {st_mode=S_IFREG|0644,
st_size=2528, ...}) = 0
[pid 25300] 0.000196 mmap(NULL, 4096, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x2af0ff102000
[pid 25300] 0.000029 read(3, "# Locale name alias data base.
\n#"..., 4096) = 2528
[pid 25300] 0.000160 read(3, "", 4096) = 0
[pid 25300] 0.000051 close(3) = 0
[pid 25300] 0.000034 munmap(0x2af0ff102000, 4096) = 0
[pid 25300] 0.000080 open("/usr/share/locale/en_US.UTF-8/
LC_MESSAGES/libc.mo", O_RDONLY) = -1 ENOENT (No such file or
directory)
[pid 25300] 0.000095 open("/usr/share/locale/en_US.utf8/
LC_MESSAGES/libc.mo", O_RDONLY) = -1 ENOENT (No such file or
directory)
[pid 25300] 0.000086 open("/usr/share/locale/en_US/LC_MESSAGES/
libc.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
[pid 25300] 0.000086 open("/usr/share/locale/en.UTF-8/LC_MESSAGES/
libc.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
[pid 25300] 0.000095 open("/usr/share/locale/en.utf8/LC_MESSAGES/
libc.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
[pid 25300] 0.000092 open("/usr/share/locale/en/LC_MESSAGES/
libc.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
[pid 25300] 0.000099 write(2, ": No such file or directory", 27:
No such file or directory) = 27
[pid 25300] 0.000054 write(2, "\n", 1
) = 1
[pid 25300] 0.000040 close(1) = 0
[pid 25300] 0.000057 exit_group(2) = ?
Process 25263 resumed
Process 25300 detached
0.001769 <... wait4 resumed> [{WIFEXITED(s) && WEXITSTATUS(s) ==
2}], 0, NULL) = 25300
0.000055 rt_sigaction(SIGINT, {SIG_DFL, [], SA_RESTORER,
0x348a2302d0}, NULL, 8) = 0
0.000086 rt_sigaction(SIGQUIT, {SIG_DFL, [], SA_RESTORER,
0x348a2302d0}, NULL, 8) = 0
0.000064 rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0
0.000033 --- SIGCHLD (Child exited) @ 0 (0) ---
0.000131 fstat(1, {st_mode=S_IFCHR|0600, st_rdev=makedev(136,
24), ...}) = 0
0.000162 mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|
MAP_ANONYMOUS, -1, 0) = 0x2b871a9cd000
0.000141 write(1, "Time before: 1326320210.213833\n", 31Time
before: 1326320210.213833
) = 31
0.000081 write(1, "Time after: 1326320211.131237\n", 31Time
after: 1326320211.131237
) = 31
0.000088 exit_group(31) = ?
Nasty, nasty ;-)
CU,
Elmar