From: Levent Aksoy (levent@portakalteknoloji.com)
Date: Fri 13 Feb 2004 - 04:59:52 EST
Cevab=FDn icin saol, baya bi yardimci oldu bana.
---------- Original Message ----------------------------------
From: Erhan Ekici <erhan@uzem.itu.edu.tr>
Reply-To: linux-ileri@liste.linux.org.tr
Date: Fri, 13 Feb 2004 11:27:14 +0200
>Merhabalar...
>
>www.google.com
>Kelime : "smtx" , "Spins on Mutex"
>
>Bazi sonuclar:
>
>High smtx,High sys or idl(it probably means..)
>Contention for kernel system resources exists.
>
>Mutex stall (type of locking), number of times a CPU failed to obtain a mu=
tex
>immediately. smtx=3D0 all is OK (smtx above 500 =3D big problem)..... impa=
ct: [big
>smtx] =3D [harddisk extremely busy]
>
>
>Bir forumdan alinti:
>http://dbforums.com/arch/128/2002/12/58758
>=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
>CPU1 is 83% busy in sys mode.
>Something is running there that locks up system wide reasources
>The Other CPU tries to get in all the time but is denied probably
>just sleeping on the locks. To say that its idle is not right since
>its doing 285 context switches
>
>
>
>Spins on mutex can be a result of overuse of a resource that can only
>be accesses by one user/process at atime.
>Typically a program or the Kernel sets a lock, accesses the resource
>and then frees the lock. If too many consumers tries to do this
>simultaneulsy
>the spin on mutexlock situation occurs, since the resource is never free.
>=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D
>
>
>
>Erhan Ekici
>Iyi calismalar
>
>
>
>Quoting Levent Aksoy <levent@portakalteknoloji.com>:
>
>> Arkadaslar merhaba, Sistemde buyuk bir yavaslama meydana geldi. "Spins=
on
>> mutex" diye bir degerin arttigini gozlemledim, bunun sistemin yavaslamas=
ina
>> etkisi ne derecededir? Bir cozumu var mi?
>
>
>
>