From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Hong H. Pham" Date: Tue, 12 May 2009 19:31:09 +0000 Subject: Re: [PATCH] sparc64: fix and optimize irq distribution Message-Id: <4A09CE7D.2050606@windriver.com> List-Id: References: <1242156589-14806-1-git-send-email-hong.pham@windriver.com> In-Reply-To: <1242156589-14806-1-git-send-email-hong.pham@windriver.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: sparclinux@vger.kernel.org Here's some benchmarks showing the effects of interrupt distribution on a T2. The test was done with iperf using a pair of T5220 boxes, each with a 10GBe NIU (XAUI) connected back to back. The kernel version is 2.6.30-rc5. TCP | Stock Linear RR IRQ Optimized IRQ Streams | 2.6.30-rc5 Distribution Distribution | Gbits/sec Gbits/sec Gbits/sec --------+----------------------------------------- 1 0.839 0.862 0.868 8 1.16 4.96 5.88 16 1.15 6.40 8.04 100 1.09 7.28 8.68 Regards, Hong