From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mailsrv.s3group.com ([193.120.90.35]:49384 "EHLO mailsrv.s3group.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752492AbaF0HAk (ORCPT ); Fri, 27 Jun 2014 03:00:40 -0400 Received: from avsrvd.s3group.com (avsrvd.s3group.com [193.120.90.37]) by mailsrv.s3group.com with ESMTP id s5R70WK6008313 for ; Fri, 27 Jun 2014 08:00:32 +0100 Received: from avsrvd.s3group.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 2A4FC15005D for ; Fri, 27 Jun 2014 08:00:32 +0100 (IST) Received: from EXDUB2.dublin.ad.s3group.com (unknown [193.120.89.80]) by avsrvd.s3group.com (Postfix) with ESMTP id 1BC64150052 for ; Fri, 27 Jun 2014 08:00:32 +0100 (IST) Message-ID: <53AD168F.3070403@s3group.com> Date: Fri, 27 Jun 2014 08:00:31 +0100 From: "Frank D'Arcy" MIME-Version: 1.0 Subject: using fio client on 64-bit machine with fio server on 32-bit machine Content-Type: text/plain; charset="ISO-8859-1"; format="flowed" Content-Transfer-Encoding: 7bit Sender: fio-owner@vger.kernel.org List-Id: fio@vger.kernel.org To: fio@vger.kernel.org Hi, I've been playing around with fio (which is really great thanks) with a view to testing hard disks on set-top boxes (which I don't have yet) and as prep for this I created a test environment consisting of 2 x virtual machines running 32-bit ubuntu (using "hashicorp/precise32" from vagrant cloud) running on a 64-bit machine with ubuntu 12.04. I started fio (v2.1.10) running in server mode on both virtual machines as follows $ fio --server=,8880 and launched 2 fio (v2.1.10) instances in client mode on the host 64-bit machine, $ fio --client=ip:127.0.0.1,8882 test.fio $ fio --client=ip:127.0.0.1,8881 test.fio where ports 8881 and 8882 are forwarded to port 8880 on each VM The sample test.fio (below) runs for 25 seconds but the values printed by the clients look garbled. eg. runtime is a huge number ("runt= 107374182400000msec") Same issue is seen when I switched to using latest fio from "git clone" and the same issue is seen with all output formats (json, terse, normal) I changed one of the virtual machines to 64-bit ubuntu (using "hashicorp/precise64" from vagrant cloud) and the client talking to the fio server on that VM gave the correct results (eg. "runt= 25001msec") while the client talking to the 32-bit ubuntu VM continued to show garbled values. So it looks like support is not there for client-server setups on non-matching architectures ? eg. 32-bit client to 64-bit server in this case, and perhaps endianess differences would be a problem too? ( but I haven't tried that ) Apologies if I've missed this issue raised elsewhere, I did a quick search and found no mention of it. It's not critical for us, as the simple workaround is to run fio standalone on each set-top box outputting results to a file and pulling the file back to a central machine for parsing. Just wanted to raise it if its unknown to you. Thanks very much, Frank my test .... [global] ;run for 25 seconds runtime=25 time_based=1 ;directory in which to create files directory=. size=1024k log_avg_msec=500 [job1] name=job1_stb1 description=Job1 Description rw=read blocksize=2 rate=1k write_bw_log=job1_stb1 write_lat_log=job1_stb1 write_iops_log=job1_stb1 [job2] name=job2_stb1 description=Job2 Description rw=write blocksize=2 rate=500 write_bw_log=job2_stb1 write_lat_log=job2_stb1 write_iops_log=job2_stb1 -- Frank D'Arcy S3 Group Ltd. South County Business Park, Leopardstown, Dublin 18, Ireland Visit S3 website: www.s3group.com ----- The information contained in this e-mail and in any attachments is confidential and is designated solely for the attention of the intended recipient(s). If you are not an intended recipient, you must not use, disclose, copy, distribute or retain this e-mail or any part thereof. If you have received this e-mail in error, please notify the sender by return e-mail and delete all copies of this e-mail from your computer system(s). Please direct any additional queries to: communications@s3group.com. Thank You. Silicon and Software Systems Limited (S3 Group). Registered in Ireland no. 378073. Registered Office: South County Business Park, Leopardstown, Dublin 18.