Hey folks, I have three specific questions about btt's output. I've searched the list, Google, and read the user guide, but I'm still not completely sure what the answers are. I'm finally posting my questions here, and I hope I'm not in the wrong place or going against etiquette by doing so! Please let me know if I am. Here are my questions: Under "Device Merge Information", are BLKmin/BLKavg/BLKmax the min/avg/max I/O size in *number of filesystem blocks* (in my case, 4 KB each) being *issued to the device*? Under "Device Seek Information", is the mean seek distance *the average number of 512 byte disk sectors* over which the disk head had to move before beginning its next IO? Finally, are the median and mode also *distances*? If so, I find it hard to believe that my mean seek distance is regularly in the tens or hundreds of thousands of disk sectors when the mode -- always 0 -- constitutes over 95% of my seek distances. Or is there a gap in my understanding here? Thanks, Vikram -- 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
