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I have collected trace data in file parse.bin with blktrace in android. Then I use btt to parse the cellocted data as below:

/ssd/blktrace/btt/btt -i parse.bin

But it does not report any data. The report is as below:


==================== All Devices ====================

            ALL           MIN           AVG           MAX           N
--------------- ------------- ------------- ------------- -----------


==================== Device Overhead ====================

       DEV |       Q2G       G2I       Q2M       I2D       D2C
---------- | --------- --------- --------- --------- ---------

==================== Device Merge Information ====================

       DEV |       #Q       #D   Ratio |   BLKmin   BLKavg   BLKmax    Total
---------- | -------- -------- ------- | -------- -------- -------- --------

==================== Device Q2Q Seek Information ====================

       DEV |          NSEEKS            MEAN          MEDIAN | MODE
---------- | --------------- --------------- --------------- | ---------------

==================== Device D2D Seek Information ====================

       DEV |          NSEEKS            MEAN          MEDIAN | MODE
---------- | --------------- --------------- --------------- | ---------------

==================== Plug Information ====================

       DEV |    # Plugs # Timer Us  | % Time Q Plugged
---------- | ---------- ----------  | ----------------

       DEV |    IOs/Unp   IOs/Unp(to)
---------- | ----------   ----------

==================== Active Requests At Q Information ====================

       DEV |  Avg Reqs @ Q
---------- | -------------

==================== I/O Active Period Information ====================

       DEV |     # Live      Avg. Act     Avg. !Act % Live
---------- | ---------- ------------- ------------- ------
---------- | ---------- ------------- ------------- ------
 Total Sys |          0   0.000000000   0.000000000   0.00

I run btt in the same way as many examples. The input file parse.bin contains valid data.

So why does not btt print any data?

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  • What are you system's details? What do you expect BTT to return? What is the valid data in parse.bin? Your question appears to need a lot more information. Please edit it to improve it.
    – music2myear
    Commented Aug 17, 2023 at 15:50

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