In order to analyse I/O performance problems which could be reported by customers we want to provide a little monitoring tool. Primarily, we would like to be able look at a history of request size and request latency histograms per device. The D and C traces provided by blktrace are exactly what we need for that purpose. So, running blktrace with appropriate filters (-a option) makes this approach feasible. Patch 1/2 allows users to get binary output from blkparse on stdout. Patch 2/2 contains blkiomon, an I/O monitoring tool, which reads blkparse data from stdin and which periodically writes I/O statistics. I would like to contribute this little tool to the blktrace source tree. I think it would complement blkparse and btt quite well. Martin -- To unsubscribe from this list: send the line "unsubscribe linux-btrace" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
