> On 05/18/15 14:51, Ankit Gupta wrote: >> Add tracepoints to retrieve information about read, write >> and non-data commands. For performance measurement support >> tracepoints are added at the beginning and at the end of >> transfers. Following is a list showing the new tracepoint >> events. The "cmd" parameter here represents the opcode, SID, >> and full 16-bit address. >> >> spmi_write_begin: cmd and data buffer. >> spmi_write_end : cmd and return value. >> spmi_read_begin : cmd. >> spmi_read_end : cmd, return value and data buffer. >> spmi_cmd : cmd. >> >> The reason that cmd appears at both the beginning and at >> the end event is that SPMI drivers can request commands >> concurrently. cmd helps in matching the corresponding >> events. >> >> SPMI tracepoints can be enabled like: >> >> echo 1 >/sys/kernel/debug/tracing/events/spmi/enable >> >> and will dump messages that can be viewed in >> /sys/kernel/debug/tracing/trace that look like: >> >> ... spmi_read_begin: opc=56 sid=00 addr=0x0000 >> ... spmi_read_end: opc=56 sid=00 addr=0x0000 ret=0 len=02 buf=0x[01-40] >> ... spmi_write_begin: opc=48 sid=00 addr=0x0000 len=3 buf=0x[ff-ff-ff] >> >> Signed-off-by: Ankit Gupta <ankgupta@xxxxxxxxxxxxxx> >> Signed-off-by: Gilad Avidov <gavidov@xxxxxxxxxxxxxx> >> Suggested-by: Sagar Dharia <sdharia@xxxxxxxxxxxxxx> >> --- > > Assuming you fix sign-off-chain: > > Reviewed-by: Stephen Boyd <sboyd@xxxxxxxxxxxxxx> Sorry, Missed your this email, will upload a new patch with just change of sign-off order. Thanks > > -- > Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, > a Linux Foundation Collaborative Project > > -- To unsubscribe from this list: send the line "unsubscribe linux-arm-msm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
