From mboxrd@z Thu Jan 1 00:00:00 1970 From: Marco Tizzoni Subject: Re: Sending packet at fixed rate really bad performance Date: Mon, 28 Sep 2009 18:28:04 +0200 Message-ID: References: <20090928141731.GA7107@phenom.dumpdata.com> Mime-Version: 1.0 Content-Type: multipart/mixed; boundary=0015175d0a3c67efae0474a5c9e2 Return-path: In-Reply-To: <20090928141731.GA7107@phenom.dumpdata.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xensource.com Errors-To: xen-devel-bounces@lists.xensource.com To: Konrad Rzeszutek Wilk Cc: xen-devel@lists.xensource.com List-Id: xen-devel@lists.xenproject.org --0015175d0a3c67efae0474a5c9e2 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable On Mon, Sep 28, 2009 at 4:17 PM, Konrad Rzeszutek Wilk wrote: > Lets narrow this down a bit. =A0You are comparing two different systems > with potentially different interfaces. Lets concentrate on one machine > first. Is the performance on your Athlon 64 without Xen (meaning you > boot without Xen) in the same ball-park figure? > I want to make sure we can eliminate the hardware being at fault here. I've already done many tests to isolate the problem before writing here. I've tried to use a different nic, different LAN, different switch and loopback as well, same results. Anyway forget aboout Athlon and let compare the same software, on the same hardware with linux and xenolinux. I've connected two pc running linux via a cross-cable and made some tests. The test achieves good results in this case for rate over 10k packets/second. On xenolinux (credit and sedf behaviour the same) the performance are really bad, 250 packets/second (as before). Also I've just modified my software to not send packets, but simply count, so no sendto() is involved. Same low rate. May be there's something wrong in my code (not yet finished). Attached you can find it if you want have a look or try to reproduce this issue. thx, Marco --0015175d0a3c67efae0474a5c9e2 Content-Type: application/x-gzip; name="main.c.gz" Content-Disposition: attachment; filename="main.c.gz" Content-Transfer-Encoding: base64 X-Attachment-Id: f_g05fnxtg0 H4sICErjwEoAA21haW4uYwCtGWtv2zjyu38F14smkuvYcYC9Q522B1/iFMbmBdtZ9K4NBEaibKKy pBVpt+4i//1mSEqiHt5L985AY2tenPcM1WGPdEiPXPGIjQkhG8rjgY+QyVauk2xMbmjmJ2TJv39P Yg4IxF1kjEoWkCQmZ38ngknJNk8ZI2enp2/6ZDQajN4A2bDT+ZnHfrQNGHkrZMCTwfp9FRTxpyqM Zikd8pjJKhgACARMTcReDOU+ZaIJFon/pS5mG3M4tK5FxuNVDcZXMY2qMMk3rOXwBpRlWawM7fwc sBC0JpfTq8nD9dK7WXwg+OkuaSwTsqMkomRFpaSERvA7CxLirxnxOTwInwM+Id/pJuVx8lO3Ie7+ br5EcWfwaSDnk+UUkaPTBmp2T7Qab968GVj/micsZv9WQs5++VuBu5l8LODqgF9GZ6Wpi+n8t+nc u7m71ATl6RfXs+ntssSMSqbbye3dYnrhfHO1yG+90Wn+Kc+dXcxtqoKolLOcPxRq6SNyzNXkemGj LKaPN5Pr67sLZ9+PXfJtQ6Mo8R3Bv7MkdPZuj8TueacDObL1JZFMSM9P4pD80UEx2xgTBepAQKVI wmNJNknAzg8h0y/SQ9GHCeCHRuJTBjV2kHTHsqdEHMaHUZIEGuuvaUZEtvN4+gksiVjslLngPp53 nmsmCkmlMDairNhLKRaT0PJyUkj9HSRuyDMhWzGQxVJL3yU8IAFnqaOU6QnwqoJtg9QTLANrHBvk R5zFsgQJumLFUwoFq+NQAym9C5gfMRpv0+K5Z0fXkwS/AFfTuQdqhqF5cupIedqvG9mTI50iVHKf NDIF/5y3YbWT1d8Cr5yzEatPOgGJY7UO95G8s1tJXSj2OxoEmcdjMM2DeBcUGENEVwGQByAxP0mz uFVVek9bUD4vlbv75YJ007E/zsZi/Hu47nY6QzUPVLNX6Q/jw8EfNFv5fSWk18OHnWvyScn1wWHq AZwzwKS3TMO2dl5isaAAazUWC4kVYrFi07OweblZFNi5LApTRECgOoSFUeVThYOf/XTvKLSupr7V U11j0tc1TFLiOD4wr5hMUuloX6AT+sqHrkt+ekdORrlLlPCvXPpr4vg2UGlDQb/j9HhcgdadR2XC HTgLDnHPG5QwmumX8xax/iGxxutW025KBX/EDYdoHVSRYJ+xcO6PKJYdUsxE/C/aKw66sUwVWzR5 Vcy7Hzjl90OnlOmGo+oHJIaHJOZp+oPy1i3yih77Yin/qEmBNkG3kXyB6OdO+Rerg5y8w8zhsZlY WCvkdQlTwGrb18MJGpeVr5U24dZmSyu9leBubfAohozJbRYTZ/pxBs3j4eJiulgA7rltopnCTWEB TDJHmCPZNy6dkcVTjCVDD00CR0kSBnTvHKl5MMDB2Se3D9fXRoofQd442MMNoDbwEBSG0VasYWQF yVYamFKwu1DrbNdSwkQkVxmFhU73AaFjEvNEkk8nPnnLUw9Hynt4ytQ68vgIP1O1p+Cv8PFz3LU1 AiGXTPgZh8Al8Zgco6xjcKPP+I7BUs7iQJCHy3tiNgoCizCFFeIbLC94gALgfITdlwZN6Z8lAcXg rw6U2rfICRZDzHCyJsTo3M6aIqvOCWUEcUzSqi3abWfKkEnrq3TEEIMQODMo+V8FyN2vzKIWWaFW ADhzB1BBQgg3fqeJEPwJx0cCCmYcTcsOKLVWSiGAyDUXZM2iVFOWaaey9moyu36YT3Xw/x/Ljkma OgZKBRpRvk5XsXAnNCZESbxS6wcSFzu9PD15L3dQrDD+XhPztIVHCK1TUo0qVKOCysgGDXICEC7J kJgrQhW9zfGvSrxd7PBlLa2VQjtgOtpiO7JSxeZBbcm1OPbIvc4qSAg5NEUSjCGXVCppxmL5bjBP fLmF4zElgWdwFoVtbOAGx/JhxYWlB0tnDU7zSR1mjDnS6hp2B661jl7rp5m6PbLE4r4AGXy1BdWh TZA2uhfLu4EOMCa5z4ru3nQ1lPu4QoYNoEH2m57RVUozuF80Rcr1rRQ6u0cNRSnQrETlRCxkqonu VkZoKecKkVXVNH0piEWCHeCe60SxmDF1LN5mXsJKVPOZWZQM13M5Uaxha6/6cIP4lO9Qj5VbYv3C ssv6+A2N3boCM3/nPe1hIBhWc3Vr3F2AK299+uWNs5h9mN0u+/m8tVcGNUiRX70iciZX3ux2CqSL u4tfvcsP88lNH0J2P79b3nkwq2Bff6f3dT1ONVvRajdsI0CK2QNcclRYg/3Tul7tsryymizgJkWf u8rN7UW2geCxF9INj/agtVG3QWCuAmuZxMKpJ7hFhz4fCPVlyCNndju5vJx7k9t/2X56guVL+Qq7 WBGhqkHGNUUOaRchZ+GgMMmIc35ul4aKQhlc0AMfwizZmPOUP3JnKM8c6SjjD4h+8+Dy8EKU27WS u9YWX79uKb68zlsLaG76c74K4BFQ1ONXgVUnl1TSsSp1rJnGJowvMb1YJtTkbBEQt08AvBY2XIWv b9WAcktReWYxLF5y5JWI24UHdVrUIZqHQJnYzq2Uc+FhaEx9VV4HAmvkFJ5t8ardEfJ12nqZxCHY p9VGwFfUV4NA/8ozdgU1AsX+lXIpmPVeDDB5qWsBHAdvhqMYZ5kXsIjuDQWYam0lWG/NRvY/94W6 j17SH9DPtf6Q7VyrWrPdfyl7Q/CnZY9WqZyDW21cvakfWTJUBqIxp3VbSma3MMi84uDkbc2VVoFj 2+f4xgrfZnFYtZy2V1qw3o3cR6sQ86p87hRCkAYFHX+Oj+vXPj387Ncold5ftv4c33bZUptZ5baF n7xpVUq4LC2jybOat5YCwx55ijCLfJlFcFNRTeIL2z8lNAsIhb2/N7S1ZZtU7jE9jnTuDwT1NlR8 sRtXgQgjuhJl+VSRaxAeMWzpuZZ1Kqgw9Mzken6jwo+wwu52pUztWdoUBmofQ3TwpepXdW8TMknV Vgxjn4EDmbq3ctj4dUnUbIessw/pG5E1ZdIs8dEjqLr3T6jiX0H5gqWufdkABlzCZiFVXxgUtwLL dYdJzQ3BLMSwGhfL0iFuYNyyF5xS0P3ZEX8hWxuJqYFSd0ZntpzdTOfefDq5BueVKjX91zKrTdTR 5QptMtsUmWsH1YQMSa2wYqrV3isdiD6mZpPyxzIAP9ZUzEHmlRMZDgn4iofW9nxwkrb+j4HxjCZQ aOxyJZ09UAwa+6rl0NBsFEIGcMvvk26ylQRaIwyKJNsTRwuz7v34abvQa7vsu6viVAb8B9CylrXY HQAA --0015175d0a3c67efae0474a5c9e2 Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel --0015175d0a3c67efae0474a5c9e2--