hpet0 versus hpet2

[Raz <raziebe@gmail.com>]

Hey Rt folks

I performed a benchmark that compares the jitter of hpet2 to hpet0.
hpet0 is reserved to the kernel use ( hpet_reserve_timer(&hd, 0).
and hd.hd_irq[0] = HPET_LEGACY_8254; in arch/x86/kernel/hpet.c).
I removed these two lines.
The bellow is a histogram compares the default hpet2 to hpet0 in atom D525.
The test performed is a simple udp sender, it sends a single udp
packet each 1ms interval.
Time stamping were made by Beckhoff ET2000 ,so that the timestamps
taken by a reliable and accurate tool.
Question is whether it is possible to push a new kernel boot command
line option that gives
the user hpet0 ?

hpet0
-50    0
-40    0
-20    2
-10    14
-5    143
-1    3992
1    95217
5    544
10    74
20    14
30    0
40    0
50    0
More    0


hpet2

Bin    Frequency
-50    1
-40    0
-20    0
-10    0
-5    0
-1    1
1    18
5    71
10    854
20    93098
30    237
40    1069
50    0
More    0