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76 • Linux Symposium 2004 • Volume One This paper and the work it describes wouldn’t have been possible without the efforts of Janet Morgan in many different ways, starting from review, test and debugging feedback to joining the midnight oil camp to help with modifications and improvements to the text during the final stages of the paper. We also thank Brian Twitchell, Steve Pratt, Gerrit Huizenga, Wayne Young, and John Lumby from IBM for their help and discussions along the way. This work was a part of the Linux Scalability Effort (LSE) on SourceForge, and further information about Linux 2.6 AIO is available at the LSE AIO web page [10]. All the external AIO patches including AIO support for buffered filesystem I/O, AIO poll and AIO support for pipes are available at [9]. 12 Legal Statement This work represents the view of the authors and does not necessarily represent the view of IBM. IBM, DB2 and DB2 Universal Database are registered trademarks of International Business Machines Corporation in the United States and/or other countries. Linux is a registered trademark of Linus Torvalds. Pentium is a trademark of Intel Corporation in the United States, other countries, or both. Other company, product, and service names may be trademarks or service marks of others. 13 Disclaimer The benchmarks discussed in this paper were conducted for research purposes only, under laboratory conditions. Results will not be realized in all computing environments. References [1] Suparna Bhattacharya, Badari Pulavarthy, Steven Pratt, and Janet Morgan. Asynchronous i/o support for linux 2.5. In Proceedings of the Linux Symposium. Linux Symposium, Ottawa, July 2003. http://archive. linuxsymposium.org/ols2003/ Proceedings/All-Reprints/ Reprint-Pulavarty-OLS2003.pdf. [2] Chris Mason. aio-stress microbenchmark. ftp://ftp.suse.com/pub/people/ mason/utils/aio-stress.c. [3] Stephen C. Tweedie. Posting on dio races in 2.4. http://marc.theaimsgroup. com/?l=linux-fsdevel&m= 105597840711609&w=2. [4] Andrew Morton. O_sync speedup patch. http: //www.kernel.org/pub/linux/ kernel/people/akpm/patches/2. 6/2.6.0/2.6.0-mm1/broken-out/ O_SYNC-speedup-2.patch. [5] Daniel McNeil. Posting on synchronized writeback races. http://marc.theaimsgroup.com/ ?l=linux-aio&m= 107671729611002&w=2. [6] Andrew Morton. Posting on in-order tagged radix tree walk based vfs writeback. http://marc.theaimsgroup.com/ ?l=bk-commits-head&m= 108184544016117&w=2. [7] William Lee Irwin. Filtered wakeup patch. http://marc.theaimsgroup. com/?l=bk-commits-head&m= 108459430513660&w=2.
Linux Symposium 2004 • Volume One • 77 [8] Transaction processing performance council. http://www.tpc.org. [9] Suparna Bhattacharya (with contributions from Andrew Morton & Chris Mason). Additional 2.6 Linux Kernel Asynchronous I/O patches. http: //www.kernel.org/pub/linux/ kernel/people/suparna/aio. [10] LSE team. Kernel Asynchronous I/O (AIO) Support for Linux. http: //lse.sf.net/io/aio.html.
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Proceedings of the Linux Symposium
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The State of ACPI in the Linux Kern
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Conference Organizers Andrew J. Hut
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TCP Connection Passing Werner Almes
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Linux Symposium 2004 • Volume One
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Cooperative Linux Dan Aloni da-x@co
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Demands, Solutions, and Improvement
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Hotplug Memory and the Linux VM Dav
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