为什么cc“real time”>>“real time”？

-2

我遇到了c编译器的问题编译简单的hello世界时，用户时间是>>>实时。为什么cc“real time”>>“real time”？

这里比较两台机器之间的时间。

应该指出的是，该机不执行任何其他任务，而其他业务快速运行（甚至其他编译器）

MACHINE 1 
$<stress> cc -xtime -# test.c 
/opt/SUNWspro/bin/../SC5.0/bin/acomp -i test.c -y-fbe -y/opt/SUNWspro/bin/../SC5.0 /bin/fbe -y-xarch=v7 -y-o -ytest.o -y-s -y-verbose -Qy -D__SunOS_5_7 -D__SUNPRO_C=0x500 -D__SVR4 -D__unix -D__sun -D__sparc -D__BUILTIN_VA_ARG_INCR -Xa -D__PRAGMA_REDEFINE_EXTNAME -Dunix -Dsun -Dsparc -D__RESTRICT -I/opt/SUNWspro/SC5.0 /include/cc "-g/opt/SUNWspro/bin/../SC5.0/bin/cc -xtime -c " 
acomp   real 0.1  user 0.0  sys  0.0 
Note: LD_LIBRARY_PATH = /opt/oracle/product/9.2.0/lib:/opt/SUNWspro/lib:/lib: /usr/ccs/lib:/usr/openwin/lib:/usr/dt/lib 
Note: LD_RUN_PATH = <null> 
/usr/ccs/bin/ld /opt/SUNWspro/SC5.0/lib/crti.o /opt/SUNWspro/SC5.0/lib/crt1.o  /opt/SUNWspro/SC5.0/lib/values-xa.o test.o -Y "P,/opt/SUNWspro/SC5.0/lib:/usr/ccs/lib: /usr/lib" -Qy -lc /opt/SUNWspro/SC5.0/lib/crtn.o 
linker  real 0.1  user 0.0  sys  0.0

MACHINE 1 
stress$ cc -xtime -# test.c 
/opt/SUNWspro/bin/../SC5.0/bin/acomp -i test.c -y-fbe -y/opt/SUNWspro/bin/../SC5.0/bin/fbe -y-xarch=v7 -y-o -ytest.o -y-s -y-verbose -Qy -D__SunOS_5_8 -D__SUNPRO_C=0x500 -D__SVR4 -D__unix -D__sun -D__sparc -D__BUILTIN_VA_ARG_INCR -Xa -D__PRAGMA_REDEFINE_EXTNAME -Dunix -Dsun -Dsparc -D__RESTRICT -I/opt/SUNWspro/SC5.0/include/cc "-g/opt/SUNWspro/bin/../SC5.0/bin/cc -xtime -c " 
acomp   real 6:00.0  user 0.0  sys  0.0 
Note: LD_LIBRARY_PATH = /lib:/opt/oracle/product/7.3.4/lib:/opt/SUNWspro/lib:/usr/ccs/lib:/usr/ucblib:/usr/openwin/lib:/usr/dt/lib 
Note: LD_RUN_PATH = <null> 
/usr/ccs/bin/ld /opt/SUNWspro/SC5.0/lib/crti.o /opt/SUNWspro/SC5.0/lib/crt1.o /opt/SUNWspro/SC5.0/lib/values-xa.o test.o -Y "P,/opt/SUNWspro/SC5.0/lib:/usr/ccs/lib:/usr/lib" -Qy -lc /opt/SUNWspro/SC5.0/lib/crtn.o 
linker   real 0.3  user 0.0  sys  0.0

编译在这一刻完成，但最后红色是编译时间前等待信号20.这是哪里，然后返回提示。

execve("/opt/SUNWspro/SC5.0/bin/cc", 0xFFBFF69C, 0xFFBFF6AC) argc = 3 
getuid()          = 1000 [1000] 
getuid()          = 1000 [1000] 
getgid()          = 1004 [1004] 
getgid()          = 1004 [1004] 
resolvepath("/usr/lib/ld.so.1", "/usr/lib/ld.so.1", 1023) = 16 
open("/var/ld/ld.config", O_RDONLY)    = 3 
fstat(3, 0xFFBFEEE8)       = 0 
mmap(0x00000000, 148, PROT_READ, MAP_SHARED, 3, 0) = 0xFF3E0000 
close(3)          = 0 
stat("/usr/lib/libc.so.1", 0xFFBFEF48)   = 0 
resolvepath("/usr/lib/libc.so.1", "/usr/lib/libc.so.1", 1023) = 18 
open("/usr/lib/libc.so.1", O_RDONLY)   = 3 
mmap(0x00000000, 8192, PROT_READ|PROT_EXEC, MAP_PRIVATE, 3, 0) = 0xFF340000 
mmap(0x00000000, 802816, PROT_NONE, MAP_PRIVATE|MAP_NORESERVE|MAP_ANON, -1, 0) = 0xFF200000 
mmap(0xFF200000, 703520, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_FIXED, 3, 0) = 0xFF200000 
mmap(0xFF2BC000, 24772, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED, 3, 704512) = 0xFF2BC000 
munmap(0xFF2AC000, 65536)      = 0 
memcntl(0xFF200000, 113528, MC_ADVISE, MADV_WILLNEED, 0, 0) = 0 
close(3)          = 0 
stat("/usr/lib/libdl.so.1", 0xFFBFEF48)   = 0 
resolvepath("/usr/lib/libdl.so.1", "/usr/lib/libdl.so.1", 1023) = 19 
open("/usr/lib/libdl.so.1", O_RDONLY)   = 3 
mmap(0xFF340000, 8192, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_FIXED, 3, 0) = 0xFF340000 
mmap(0x00000000, 8192, PROT_NONE, MAP_PRIVATE|MAP_NORESERVE|MAP_ANON, -1, 0) = 0xFF330000 
mmap(0xFF330000, 2638, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED, 3, 0) = 0xFF330000 
close(3)          = 0 
stat("/usr/platform/SUNW,Sun-Fire-V890/lib/libc_psr.so.1", 0xFFBFEC68) = 0 
resolvepath("/usr/platform/SUNW,Sun-Fire-V890/lib/libc_psr.so.1", "/usr/platform/sun4u-us3/lib/libc_psr.so.1", 1023) = 41 
open("/usr/platform/SUNW,Sun-Fire-V890/lib/libc_psr.so.1", O_RDONLY) = 3 
mmap(0xFF340000, 8192, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_FIXED, 3, 0) = 0xFF340000 
close(3)          = 0 
mmap(0x00000000, 8192, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_ANON, -1, 0) = 0xFF320000 
dup(0)           = 3 
llseek(0, 0, SEEK_CUR)       = 749366 
close(0)          = 0 
fcntl(3, F_DUP2FD, 0x00000000)     = 0 
close(3)          = 0 
dup(1)           = 3 
close(1)          = 0 
fcntl(3, F_DUP2FD, 0x00000001)     = 1 
close(3)          = 0 
dup(2)           = 3 
close(2)          = 0 
fcntl(3, F_DUP2FD, 0x00000002)     = 2 
close(3)          = 0 
sys#177(0x00000080, 0xFFBFF47C, 0xFF3F0500, 0x00000000, 0xFF3C2EF8, 0xFF2C0284) = 0x00000000 [0xFFBFF47C] 
sys#227(0x00000006, 0x00000000, 0x0001ADFC, 0xFF3F0500, 0xFF3C3C18, 0xFF3C2670) = 0x00000009 [0x00000000] 
sys#227(0x00000002, 0x00000009, 0x0000000E, 0xFFBFF5AE, 0x00000002, 0xFF3C2670) = 0x00000002 [0x00000000] 
sys#177(0x00000001, 0xFFBFF508, 0x73797364, 0x6363002D, 0x00000002, 0xFF3C2670) = 0x00000000 [0xFFBFF508] 
open("/.machine", O_RDONLY)      Err#2 ENOENT 
sys#177(0x00000003, 0xFFBFF4EC, 0x73797364, 0x6363002D, 0x00000002, 0xFF3C2670) = 0x00000000 [0xFFBFF4EC] 
getuid()          = 1000 [1000] 
getuid()          = 1000 [1000] 
getgid()          = 1004 [1004] 
getgid()          = 1004 [1004] 
resolvepath("/usr/lib/ld.so.1", "/usr/lib/ld.so.1", 1023) = 16 
open("/var/ld/ld.config", O_RDONLY)    = 3 
fstat(3, 0xFFBFEEE8)       = 0 
mmap(0x00000000, 148, PROT_READ, MAP_SHARED, 3, 0) = 0xFF310000 
close(3)          = 0 
stat("/usr/lib/secure/s8_preload.so.1", 0xFFBFF020) = 0 
resolvepath("/usr/lib/secure/s8_preload.so.1", "/.SUNWnative/usr/lib/brand/solaris8/s8_preload.so.1", 1023) = 51 
open("/usr/lib/secure/s8_preload.so.1", O_RDONLY) = 3 
mmap(0x00000000, 8192, PROT_READ|PROT_EXEC, MAP_PRIVATE, 3, 0) = 0xFF300000 
mmap(0x00002000, 81920, PROT_NONE, MAP_PRIVATE|MAP_NORESERVE|MAP_ANON, -1, 0) = 0xFF2E0000 
mmap(0xFF2E0000, 920, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_FIXED, 3, 0) = 0xFF2E0000 
mmap(0xFF2F2000, 272, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED, 3, 8192) = 0xFF2F2000 
munmap(0xFF2E2000, 65536)      = 0 
memcntl(0xFF2E0000, 736, MC_ADVISE, MADV_WILLNEED, 0, 0) = 0 
close(3)          = 0 
stat("/opt/oracle/product/7.3.4/lib/libc.so.1", 0xFFBFEF48) Err#2 ENOENT 
stat("/usr/lib/libc.so.1", 0xFFBFEF48)   = 0 
resolvepath("/usr/lib/libc.so.1", "/usr/lib/libc.so.1", 1023) = 18 
open("/usr/lib/libc.so.1", O_RDONLY)   = 3 
mmap(0xFF300000, 8192, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_FIXED, 3, 0) = 0xFF300000 
mmap(0x00000000, 802816, PROT_NONE, MAP_PRIVATE|MAP_NORESERVE|MAP_ANON, -1, 0) = 0xFF100000 
mmap(0xFF100000, 703520, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_FIXED, 3, 0) = 0xFF100000 
mmap(0xFF1BC000, 24772, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED, 3, 704512) = 0xFF1BC000 
munmap(0xFF1AC000, 65536)      = 0 
memcntl(0xFF100000, 113528, MC_ADVISE, MADV_WILLNEED, 0, 0) = 0 
close(3)          = 0 
stat("/opt/oracle/product/7.3.4/lib/libdl.so.1", 0xFFBFEF48) Err#2 ENOENT 
stat("/usr/lib/libdl.so.1", 0xFFBFEF48)   = 0 
resolvepath("/usr/lib/libdl.so.1", "/usr/lib/libdl.so.1", 1023) = 19 
open("/usr/lib/libdl.so.1", O_RDONLY)   = 3 
mmap(0xFF300000, 8192, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_FIXED, 3, 0) = 0xFF300000 
mmap(0x00000000, 8192, PROT_NONE, MAP_PRIVATE|MAP_NORESERVE|MAP_ANON, -1, 0) = 0xFF2D0000 
mmap(0xFF2D0000, 2638, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED, 3, 0) = 0xFF2D0000 
close(3)          = 0 
mmap(0x00000000, 8192, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_ANON, -1, 0) = 0xFF2B0000 
stat("/usr/platform/SUNW,Sun-Fire-V890/lib/libc_psr.so.1", 0xFFBFEC68) = 0 
resolvepath("/usr/platform/SUNW,Sun-Fire-V890/lib/libc_psr.so.1", "/usr/platform/sun4u-us3/lib/libc_psr.so.1", 1023) = 41 
open("/usr/platform/SUNW,Sun-Fire-V890/lib/libc_psr.so.1", O_RDONLY) = 3 
mmap(0xFF300000, 8192, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_FIXED, 3, 0) = 0xFF300000 
close(3)          = 0 
sys#229(0x00046ED8, 0x00000400)     = 0x00000000 [0x00000400] 
brk(0x000477D0)         = 0 
brk(0x000497D0)         = 0 
stat("/opt/oracle/product/7.3.4/bin/cc", 0xFFBFEC28) Err#2 ENOENT 
stat("/appl/prod/siscel/util/cc", 0xFFBFEC28) Err#2 ENOENT 
stat("/solaris7/usr/ccs/bin/cc", 0xFFBFEC28) Err#2 ENOENT 
stat("/opt/SUNWspro/bin/cc", 0xFFBFEC28)  = 0 
readlink("/opt/SUNWspro/bin/cc", "../SC5.0/bin/cc", 1024) = 15 
readlink("/opt/SUNWspro/bin/../SC5.0/bin/cc", 0xFFBFED14, 1024) Err#22 EINVAL 
open("/opt/SUNWspro/bin/../SC5.0/bin/../lib/locale/C/LC_MESSAGES/SUNW_SPRO_SC_cc.cat", O_RDONLY) Err#2 ENOENT 
open("/opt/SUNWspro/bin/../SC5.0/bin/../../lib/locale/C/LC_MESSAGES/SUNW_SPRO_SC_cc.cat", O_RDONLY) Err#2 ENOENT 
lwp_sigtimedwait(0xFFBFF518, 0xFFBFF3D8, 0x00000020) = 0 
lwp_sigtimedwait(0xFFBFF3E0, 0xFFBFF308, 0x00000010) = 0 
sysconfig(_CONFIG_SIGRT_MIN)     = 41 
sysconfig(_CONFIG_SIGRT_MAX)     = 48 
lwp_sigtimedwait(0xFFBFF2F8, 0xFFBFF3E0, 0x00000010) = 0 
sigaction(SIGHUP, 0xFFBFF3D8, 0xFFBFF3B0)  = 0 
lwp_sigtimedwait(0xFFBFF3B8, 0xFFBFF308, 0x00000010) = 0 
lwp_sigtimedwait(0xFFBFF2F8, 0xFFBFF3B8, 0x00000010) = 0 
lwp_sigtimedwait(0xFFBFF3B0, 0xFFBFF598, 0x00000020) = 0 
lwp_sigtimedwait(0xFFBFF518, 0xFFBFF3D8, 0x00000020) = 0 
lwp_sigtimedwait(0xFFBFF3E0, 0xFFBFF308, 0x00000010) = 0 
lwp_sigtimedwait(0xFFBFF2F8, 0xFFBFF3E0, 0x00000010) = 0 
sigprocmask(SIG_BLOCK, 0xFFBFF3A0, 0xFFBFF388) = 0 
sigaction(SIGHUP, 0xFFBFF3D8, 0xFFBFF3B0)  = 0 
lwp_sigtimedwait(0xFFBFF3B8, 0xFFBFF308, 0x00000010) = 0 
lwp_sigtimedwait(0xFFBFF2F8, 0xFFBFF3B8, 0x00000010) = 0 
lwp_sigtimedwait(0xFFBFF3B0, 0xFFBFF598, 0x00000020) = 0 
sigprocmask(SIG_SETMASK, 0xFFBFF388, 0x00000000) = 0 
lwp_sigtimedwait(0xFFBFF518, 0xFFBFF3D8, 0x00000020) = 0 
lwp_sigtimedwait(0xFFBFF3E0, 0xFFBFF308, 0x00000010) = 0 
lwp_sigtimedwait(0xFFBFF2F8, 0xFFBFF3E0, 0x00000010) = 0 
sigaction(SIGINT, 0xFFBFF3D8, 0xFFBFF3B0)  = 0 
lwp_sigtimedwait(0xFFBFF3B8, 0xFFBFF308, 0x00000010) = 0 
lwp_sigtimedwait(0xFFBFF2F8, 0xFFBFF3B8, 0x00000010) = 0 
lwp_sigtimedwait(0xFFBFF3B0, 0xFFBFF598, 0x00000020) = 0 
lwp_sigtimedwait(0xFFBFF518, 0xFFBFF3D8, 0x00000020) = 0 
lwp_sigtimedwait(0xFFBFF3E0, 0xFFBFF308, 0x00000010) = 0 
lwp_sigtimedwait(0xFFBFF2F8, 0xFFBFF3E0, 0x00000010) = 0 
sigprocmask(SIG_BLOCK, 0xFFBFF3A0, 0xFFBFF388) = 0 
sigaction(SIGINT, 0xFFBFF3D8, 0xFFBFF3B0)  = 0 
lwp_sigtimedwait(0xFFBFF3B8, 0xFFBFF308, 0x00000010) = 0 
lwp_sigtimedwait(0xFFBFF2F8, 0xFFBFF3B8, 0x00000010) = 0 
lwp_sigtimedwait(0xFFBFF3B0, 0xFFBFF598, 0x00000020) = 0 
sigprocmask(SIG_SETMASK, 0xFFBFF388, 0x00000000) = 0 
lwp_sigtimedwait(0xFFBFF518, 0xFFBFF3D8, 0x00000020) = 0 
lwp_sigtimedwait(0xFFBFF3E0, 0xFFBFF308, 0x00000010) = 0 
lwp_sigtimedwait(0xFFBFF2F8, 0xFFBFF3E0, 0x00000010) = 0 
sigaction(SIGTERM, 0xFFBFF3D8, 0xFFBFF3B0)  = 0 
lwp_sigtimedwait(0xFFBFF3B8, 0xFFBFF308, 0x00000010) = 0 
lwp_sigtimedwait(0xFFBFF2F8, 0xFFBFF3B8, 0x00000010) = 0 
lwp_sigtimedwait(0xFFBFF3B0, 0xFFBFF598, 0x00000020) = 0 
lwp_sigtimedwait(0xFFBFF518, 0xFFBFF3D8, 0x00000020) = 0 
lwp_sigtimedwait(0xFFBFF3E0, 0xFFBFF308, 0x00000010) = 0 
lwp_sigtimedwait(0xFFBFF2F8, 0xFFBFF3E0, 0x00000010) = 0 
sigprocmask(SIG_BLOCK, 0xFFBFF3A0, 0xFFBFF388) = 0 
sigaction(SIGTERM, 0xFFBFF3D8, 0xFFBFF3B0)  = 0 
lwp_sigtimedwait(0xFFBFF3B8, 0xFFBFF308, 0x00000010) = 0 
lwp_sigtimedwait(0xFFBFF2F8, 0xFFBFF3B8, 0x00000010) = 0 
lwp_sigtimedwait(0xFFBFF3B0, 0xFFBFF598, 0x00000020) = 0 
sigprocmask(SIG_SETMASK, 0xFFBFF388, 0x00000000) = 0 
lwp_sigtimedwait(0xFFBFF518, 0xFFBFF3D8, 0x00000020) = 0 
lwp_sigtimedwait(0xFFBFF3E0, 0xFFBFF308, 0x00000010) = 0 
lwp_sigtimedwait(0xFFBFF2F8, 0xFFBFF3E0, 0x00000010) = 0 
sigaction(SIGPIPE, 0xFFBFF3D8, 0xFFBFF3B0)  = 0 
lwp_sigtimedwait(0xFFBFF3B8, 0xFFBFF308, 0x00000010) = 0 
lwp_sigtimedwait(0xFFBFF2F8, 0xFFBFF3B8, 0x00000010) = 0 
lwp_sigtimedwait(0xFFBFF3B0, 0xFFBFF598, 0x00000020) = 0 
lwp_sigtimedwait(0xFFBFF518, 0xFFBFF3D8, 0x00000020) = 0 
lwp_sigtimedwait(0xFFBFF3E0, 0xFFBFF308, 0x00000010) = 0 
lwp_sigtimedwait(0xFFBFF2F8, 0xFFBFF3E0, 0x00000010) = 0 
sigprocmask(SIG_BLOCK, 0xFFBFF3A0, 0xFFBFF388) = 0 
sigaction(SIGPIPE, 0xFFBFF3D8, 0xFFBFF3B0)  = 0 
lwp_sigtimedwait(0xFFBFF3B8, 0xFFBFF308, 0x00000010) = 0 
lwp_sigtimedwait(0xFFBFF2F8, 0xFFBFF3B8, 0x00000010) = 0 
lwp_sigtimedwait(0xFFBFF3B0, 0xFFBFF598, 0x00000020) = 0 
sigprocmask(SIG_SETMASK, 0xFFBFF388, 0x00000000) = 0 
brk(0x000497D0)         = 0 
brk(0x0004B7D0)         = 0 
uname(0xFFBFEAA8)        = 1 
lwp_sigtimedwait(0xFFBFEAA8, 0xFFBFF0D0, 0x00000505) = 0 
fork()           = 10196 
wait()       (sleeping...) 
    Received signal #20, SIGWINCH, in wait() [default] 
     siginfo: SIG#0 
    Received signal #20, SIGWINCH, in wait() [default] 
     siginfo: SIG#0 
wait()       (sleeping...) 
wait()           = 10196 [0x0000] 
llseek(0, 0, SEEK_CUR)       = 757598 
_exit(0)

任何想法在哪里看？

来源

2012-03-22 caeycae

目前还不清楚你要求我们看什么。 – 2012-03-22 14:20:30

请记住，您非常熟悉您的代码，以及发生了什么。我们不是。请突出显示重要信息，以便我们可以看到它，并请解释您所做的确定问题原因的方法。 – gbulmer 2012-03-22 15:10:30

您的标题和说明都是虚假的。 “实时”不能比“实时”大得多，并且“用户时间”不会大于“实时”。你发布的节目是“实时”大于“用户时间”，这是预期的。请张贴带有时间戳的桁架输出。 – jlliagre 2012-03-24 11:09:52

实时（即挂钟时间）总是大于用户（应用程序）和系统（OS）时间的总和。

当程序执行输入/输出操作时没有CPU使用率，显然，编译需要大量I/O。

来源

2012-03-24 09:00:15 jlliagre

为什么cc“real time”>>“real time”？

回答

相关问题