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Date: Mon, 17 Mar 2008 12:34:23 -0400 From: "Alan D. Brunelle" <Alan.Brunelle@...com> To: linux-kernel@...r.kernel.org Cc: Jens Axboe <jens.axboe@...cle.com>, npiggin@...e.de, dgc@....com Subject: [PATCH (block.git) 0/2] IO CPU affinity update: Hi Jens - Two patches: 1. Adds in the IRQ saving to generic_smp_call_function_single_interrupt (as you had suggested). 2. Ensures a single IPI generated to get a remote function call handler going. So far it is working better than before on the 4-way IA64 w/ the mkfs/untar/make test suite - after 22 runs: Part RQ MIN AVG MAX Dev ----- -- ------ ------ ------ ------ mkfs 0 18.786 19.253 19.655 0.241 mkfs 1 18.639 19.182 19.786 0.293 untar 0 17.140 17.486 18.250 0.322 untar 1 16.951 17.494 18.274 0.350 make 0 22.927 24.310 34.339 2.287 make 1 22.863 23.788 24.189 0.333 comb 0 59.478 61.049 70.320 2.142 comb 1 59.875 60.463 61.305 0.458 psys 0 3.96% 4.14% 4.39% 0.100 psys 1 3.60% 3.85% 4.19% 0.176 So we're seeing reduced time (~1.0%) and reduced %sys to do it (7.0%). The tighter deviations for make with rq=1 may be interesting... :-) I've compiled & booted the patches for x86_64 - rq=1 is working on that platform too. Alan -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.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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