From: Erhan Ekici (erhan@uzem.itu.edu.tr)
Date: Fri 13 Feb 2004 - 04:27:14 EST
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 mutex
immediately. smtx=0 all is OK (smtx above 500 = big problem)..... impact: [big
smtx] = [harddisk extremely busy]
Bir forumdan alinti:
http://dbforums.com/arch/128/2002/12/58758
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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.
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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 yavaslamasina
> etkisi ne derecededir? Bir cozumu var mi?