Hi,
On 03/03/2016 07:55 PM, Tom Zanussi wrote:
> When using '.log2' modifier, the output looks like:
>
> # echo 'hist:key=bytes_req.log2' > kmalloc/trigger
> # cat kmalloc/hist
>
> { bytes_req: ~ 2^12 } hitcount: 1
> { bytes_req: ~ 2^11 } hitcount: 1
> { bytes_req: ~ 2^9 } hitcount: 2
> { bytes_req: ~ 2^6 } hitcount: 3
> { bytes_req: ~ 2^3 } hitcount: 13
> { bytes_req: ~ 2^5 } hitcount: 19
> { bytes_req: ~ 2^8 } hitcount: 49
> { bytes_req: ~ 2^7 } hitcount: 57
> { bytes_req: ~ 2^4 } hitcount: 74
I found a small inconsistency. My command line is
echo 'hist:key=latency.log2:sort=latency' >
/sys/kernel/debug/tracing/events/test/latency_complete/trigger
When looking at the output of 'hist' you see that the
'sort=' is not what I provided.
cat /sys/kernel/debug/tracing/events/test/latency_complete/hist
# event histogram
#
# trigger info:
hist:keys=latency.log2:vals=hitcount:sort=latency.log2:size=2048 [active]
#
#
This is not terrible important.
cheers,
daniel
