mmcsnoop: trace mmc operations #100
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Make use of ftrace instances feature for being able to start several ftrace scripts simultaneously. Signed-off-by: Andreas Klinger <ak@it-klinger.de>
Make use of ftrace instances feature for being able to start several ftrace scripts simultaneously. Signed-off-by: Andreas Klinger <ak@it-klinger.de>
Set a flag to indicate that file lock was written. Also add a warning when switching off current_tracer. Signed-off-by: Andreas Klinger <ak@it-klinger.de>
Make usage of trace_clock global. This makes tracing output of different cores compareable not only among each other but also to dmesg. Signed-off-by: Andreas Klinger <ak@it-klinger.de>
Prints out relevant datas of mmc commands by using ftrace framework. In comparison to the iosnoop script which is tracing block i/o operations there are a couple of informations special to mmc devices and shown by this script: - operation command (opcode) - command argument - command flags - error code Make use of ftrace instances feature for being able to start several ftrace scripts simultaneously. Use trace_clock global to be compareable to dmesg and between cpu cores. Signed-off-by: Andreas Klinger <ak@it-klinger.de>
Add a new script mmcsnoop for tracing mmc operations, especially for printing out command, their arguments, flags and error. At the same time block-io should also be traced for being able to compare. Therefore support for instances is needed and added to iosnoop and iolatency scripts.
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print out mmc operations, the commands, flags and errors
Start it together with block io.
Therefore support for instances is needed and added in iosnoop and iolatency.