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Monday, June 23 • 3:05pm - 3:55pm
Kernel Event Tracing on the Mainframe - Michael Holzheu, IBM

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Since mainframes traditionally run mission critical workloads, serviceability has always been of high importance to the platform. Customers expect the root cause of a problem to be found with the first set of debugging data collected. Reproducing the error is not welcome and must be avoided. With this in mind, IBM provided the s390dbf kernel tracing infrastructure when Linux was ported to the s390 architecture at the beginning of 2000. This was about eight years before Linux ftrace and tracepoints were integrated into the upstream Linux kernel. In some areas, tracepoints offer advantages, for example, per-CPU trace buffers or an event streaming capability. Yet, tracepoints do not offer all features that are needed for s390. This presentation reviews the two tracing features and shows what would have to be added to tracepoints to achieve the same functionality as s390dbf.

avatar for Michael Holzheu

Michael Holzheu

Dipl. Inf, IBM
Michael Holzheu is a Linux kernel developer at the IBM lab in Boeblingen, Germany. He studied computer science at the University of Erlangen and has worked for IBM since 1998. After a start in the z/OS UNIX Systems Services environment, he joined the Linux for System z team in 2000. His main focus is RAS, kernel dump, and device driver development.

Monday June 23, 2014 3:05pm - 3:55pm
Exchange Hub North

Attendees (4)