Fine grained kernel logging with KLogger: experience and insights

  • Authors:

  • Yoav Etsion;Dan Tsafrir;Scott Kirkpatrick;Dror G. Feitelson

  • Affiliations:

  • The Hebrew University of Jerusalem, Israel;The Hebrew University of Jerusalem, Israel and IBM T. J. Watson Research Center, Yorktown Heights, NY;The Hebrew University of Jerusalem, Israel;The Hebrew University of Jerusalem, Israel

  • Venue:
  • Proceedings of the 2nd ACM SIGOPS/EuroSys European Conference on Computer Systems 2007
  • Year:
  • 2007

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Abstract

Understanding the detailed behavior of an operating system is crucial for making informed design decisions. But such an understanding is very hard to achieve, due to the increasing complexity of such systems and the fact that they are implemented and maintained by large and diverse groups of developers. Tools like KLogger --- presented in this paper --- can help by enabling fine-grained logging of system events and the sharing of a logging infrastructure between multiple developers and researchers, facilitating a methodology where design evaluation can be an integral part of kernel development. We demonstrate the need for such methodology by a host of case studies, using KLogger to better understand various subsystems in the Linux kernel, and pinpointing overheads and problems therein.