On Thu, Dec 19, 2013 at 7:52 AM, Alexandre Courbot <gnu...@gmail.com> wrote: > On Tue, Dec 17, 2013 at 9:22 AM, Jean-Jacques Hiblot > <jjhib...@traphandler.com> wrote: >> >> This patch implements a new tracing mechanism based on kprobes and using >> GPIO. >> Debugging with GPIO is very common in the embedded world. At least for those >> of us >> fortunate enough to have an oscilloscope or a logic analyzer on their >> bench... >> This is especially true if the issue results of a hardware/sofware >> interaction. >> >> Typical use cases are : >> * mixed software/hardware debugging. For example when the software detects a >> situation of interest (typically an error) it toggles a GPIO to trigger the >> oscilloscope acquisition. >> * direct latency/duration measurements. >> >> examples: >> To trig the oscilloscope whenever a mmc command error: >> echo "p:my_mmc_blk_error mmc_blk_cmd_error gpiopulse@13" > >> /sys/kernel/debug/tracing/kprobe_events >> echo 1 > /sys/kernel/debug/tracing/events/kprobes/my_mmc_blk_error/enable
I've never seen the whole patch. Can you please repost this and include linux-g...@vger.kernel.org and also me on the To: line? Yours, Linus Walleij -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
