tree 3c0a592d3526b994ad7efa65ad31320997cf5050
parent ac5c03cef0f0b3676b22e66e89f74ec33f69e9c6
author Kirill Smelkov <kirr@nexedi.com> 1506327783 +0300
committer Kirill Smelkov <kirr@nexedi.com> 1506343977 +0300

hardirqs, softirqs: Fix distribution mode units handling

Even if units was μs and thus factor=1000 `hardirqs -d` and `softirqs
-d` were printing actual data in nanoseconds but with distribution unit
labeled as "usecs", e.g.:

    softirq = sched
         usecs               : count     distribution
             0 -> 1          : 0        |                                        |
             2 -> 3          : 0        |                                        |
             4 -> 7          : 0        |                                        |
             8 -> 15         : 0        |                                        |
            16 -> 31         : 0        |                                        |
            32 -> 63         : 0        |                                        |
            64 -> 127        : 0        |                                        |
           128 -> 255        : 0        |                                        |
           256 -> 511        : 0        |                                        |
           512 -> 1023       : 0        |                                        |
          1024 -> 2047       : 6        |*****                                   |
          2048 -> 4095       : 3        |**                                      |
          4096 -> 8191       : 8        |*******                                 |
          8192 -> 16383      : 31       |*****************************           |
         16384 -> 32767      : 42       |****************************************|
         32768 -> 65535      : 18       |*****************                       |

Fix it.

NOTE: not putting "/ FACTOR" into common code because for counting mode
we do not want to round intermediate results as e.g. there could be lots
of say 0.5μs interrupts that should be all accounted as N*0.5, not N*0.0.