如何解析下面truss的内容

eagle_fan

服务器有四个cpu,l oad大约15

SunOS srwdb02 5.8 Generic_117350-28 sun4u sparc SUNW,Sun-Fire-V490

mpstat显示空闲CPU为0,　usr CPU占用90%

我观察到耗用CPU的都为一些Oracle Process,但是这些process都在等待oracle中的一个等待空闲事件，应该不会这么消耗CPU

tuss -p pid　发现其好像在不停的spin CPU,　哪位帮忙解释一下具体在干吗？

谢谢

truss的一些片断，不断重复出现

getcontext(0xFFFFFFFF7FFFAFB0)
setcontext(0xFFFFFFFF7FFFAFB0)
sigaction(SIGBUS, 0xFFFFFFFF7FFFB7E0, 0x00000000) = 0
sigaction(SIGSEGV, 0xFFFFFFFF7FFFB7E0, 0x00000000) = 0
sigaction(SIGBUS, 0xFFFFFFFF7FFFB7E0, 0xFFFFFFFF7FFFB8E0) = 0
sigaction(SIGSEGV, 0xFFFFFFFF7FFFB7E0, 0xFFFFFFFF7FFFB8B = 0
getcontext(0xFFFFFFFF7FFFB500)
    Incurred fault #6, FLTBOUNDS  %pc = 0x1010B39D8
      siginfo: SIGSEGV SEGV_MAPERR addr=0x28942A0000
    Received signal #11, SIGSEGV [caught]
      siginfo: SIGSEGV SEGV_MAPERR addr=0x28942A0000
getcontext(0xFFFFFFFF7FFFAFB0)
setcontext(0xFFFFFFFF7FFFAFB0)
sigaction(SIGBUS, 0xFFFFFFFF7FFFB7E0, 0x00000000) = 0
sigaction(SIGSEGV, 0xFFFFFFFF7FFFB7E0, 0x00000000) = 0
sigaction(SIGBUS, 0xFFFFFFFF7FFFB7E0, 0xFFFFFFFF7FFFB8E0) = 0
sigaction(SIGSEGV, 0xFFFFFFFF7FFFB7E0, 0xFFFFFFFF7FFFB8B = 0
getcontext(0xFFFFFFFF7FFFB500)
    Incurred fault #6, FLTBOUNDS  %pc = 0x1010B39D8
      siginfo: SIGSEGV SEGV_MAPERR addr=0x28942A2000
    Received signal #11, SIGSEGV [caught]
      siginfo: SIGSEGV SEGV_MAPERR addr=0x28942A2000
getcontext(0xFFFFFFFF7FFFAFB0)
setcontext(0xFFFFFFFF7FFFAFB0)
sigaction(SIGBUS, 0xFFFFFFFF7FFFB7E0, 0x00000000) = 0
sigaction(SIGSEGV, 0xFFFFFFFF7FFFB7E0, 0x00000000) = 0
sigaction(SIGBUS, 0xFFFFFFFF7FFFB7E0, 0xFFFFFFFF7FFFB8E0) = 0
sigaction(SIGSEGV, 0xFFFFFFFF7FFFB7E0, 0xFFFFFFFF7FFFB8B = 0
getcontext(0xFFFFFFFF7FFFB500)
    Incurred fault #6, FLTBOUNDS  %pc = 0x1010B39D8
      siginfo: SIGSEGV SEGV_MAPERR addr=0x28942A4000
    Received signal #11, SIGSEGV [caught]
      siginfo: SIGSEGV SEGV_MAPERR addr=0x28942A4000
getcontext(0xFFFFFFFF7FFFAFB0)
setcontext(0xFFFFFFFF7FFFAFB0)
sigaction(SIGBUS, 0xFFFFFFFF7FFFB7E0, 0x00000000) = 0
sigaction(SIGSEGV, 0xFFFFFFFF7FFFB7E0, 0x00000000) = 0
sigaction(SIGBUS, 0xFFFFFFFF7FFFB7E0, 0xFFFFFFFF7FFFB8E0) = 0
sigaction(SIGSEGV, 0xFFFFFFFF7FFFB7E0, 0xFFFFFFFF7FFFB8B = 0
getcontext(0xFFFFFFFF7FFFB500)
    Incurred fault #6, FLTBOUNDS  %pc = 0x1010B39D8
      siginfo: SIGSEGV SEGV_MAPERR addr=0x28942A6000
    Received signal #11, SIGSEGV [caught]
      siginfo: SIGSEGV SEGV_MAPERR addr=0x28942A6000
getcontext(0xFFFFFFFF7FFFAFB0)
setcontext(0xFFFFFFFF7FFFAFB0)
sigaction(SIGBUS, 0xFFFFFFFF7FFFB7E0, 0x00000000) = 0
sigaction(SIGSEGV, 0xFFFFFFFF7FFFB7E0, 0x00000000) = 0
sigaction(SIGBUS, 0xFFFFFFFF7FFFB7E0, 0xFFFFFFFF7FFFB8E0) = 0
sigaction(SIGSEGV, 0xFFFFFFFF7FFFB7E0, 0xFFFFFFFF7FFFB8B = 0
getcontext(0xFFFFFFFF7FFFB500)
    Incurred fault #6, FLTBOUNDS  %pc = 0x1010B39D8
      siginfo: SIGSEGV SEGV_MAPERR addr=0x28942A8000
    Received signal #11, SIGSEGV [caught]
      siginfo: SIGSEGV SEGV_MAPERR addr=0x28942A8000
getcontext(0xFFFFFFFF7FFFAFB0)
setcontext(0xFFFFFFFF7FFFAFB0)
sigaction(SIGBUS, 0xFFFFFFFF7FFFB7E0, 0x00000000) = 0
sigaction(SIGSEGV, 0xFFFFFFFF7FFFB7E0, 0x00000000) = 0
sigaction(SIGBUS, 0xFFFFFFFF7FFFB7E0, 0xFFFFFFFF7FFFB8E0) = 0
sigaction(SIGSEGV, 0xFFFFFFFF7FFFB7E0, 0xFFFFFFFF7FFFB8B = 0
getcontext(0xFFFFFFFF7FFFB500)

eagle_fan

有人遇到过这种情况吗？