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Re: Poor thread performance on Linux vs. Solaris

On Tuesday 09 September 2003 3:38 am, Hu, Boris wrote:

> Try the futex_q_lock-0.2 patch. It is also against linux-2.6.0-test4.
> It does the following things:
> * Remove the global futex_lock as the previous futex_q_lock patch did.
> * Add bucket spinlock recursively check as Jakub mentioned.
> * Move vcache_lock out of lock/unlock_futex_mm() and only to protect
> the actual vcache operations. * Shrink some lock/unlock_futex_mm()
> scopes.

Hi Boris,

The system hangs when I start our application with this patch.  It still 
accepts socket connections, but the console keyboard is ignored and all 
network sessions freeze.

I've never debugged a system hang on linux before, so I'm hunting for the 
correct way to proceed now.  (kernel docs directory, web sites, et al)



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