Messages in this thread | | | Date | Tue, 28 Feb 2006 17:19:04 -0500 | From | Gautam H Thaker <> | Subject | Re: ~5x greater CPU load for a networked application when using 2.6.15-rt15-smp vs. 2.6.12-1.1390_FC4 |
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Matt Mackall wrote: > On Thu, Feb 23, 2006 at 02:55:56PM -0500, Gautam H Thaker wrote: > >>The real-time patches at the URL below do a great job of endowing Linux with >>real-time capabilities. >> >>http://people.redhat.com/mingo/realtime-preempt/ >> >>It has been documented before (and accepted) that this patch turns Linux into >>a RT kernel but considerably slows down the code paths, esp. thru the I/O >>subsystem. I want to provide some additional measurements and seek opinions >>of if it might ever be possible to improve on this situation. > > > Are you using the SLAB or SLOB allocator in the -rt kernel?
lake> grep SL config.2.6.15-rt15-smp CONFIG_SEMAPHORE_SLEEPERS=y CONFIG_SLAB=y # CONFIG_SLOB is not set
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Gautam H. Thaker Distributed Processing Lab; Lockheed Martin Adv. Tech. Labs 3 Executive Campus; Cherry Hill, NJ 08002 856-792-9754, fax 856-792-9925 email: gthaker@atl.lmco.com - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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