tc filter ouput, no filter hits?

hi,

ive seen some examples where the output from:
tc -s filter show dev ifb0 parent 1: 
shows a filter hit count, like the output shown below:

filter protocol ip pref 1 u32
filter protocol ip pref 1 u32 fh 800: ht divisor 1
filter protocol ip pref 1 u32 fh 800::800 order 2048 key ht 800 bkt 0 flowid 
1:1  (rule hit 2 success 0)



however in my openwrt 12.09 and on my ubuntu machine i dont see the part in the paranthese, why is that?

ubuntu:
iproute (20120521-3ubuntu1)
3.2.0-23-generic #36-Ubuntu


greets

On Sat, 2012-12-29 at 05:46 -0800, julius wrote:

hi,

ive seen some examples where the output from:
tc -s filter show dev ifb0 parent 1: 
shows a filter hit count, like the output shown below:

filter protocol ip pref 1 u32
filter protocol ip pref 1 u32 fh 800: ht divisor 1
filter protocol ip pref 1 u32 fh 800::800 order 2048 key ht 800 bkt 0 flowid 
1:1  (rule hit 2 success 0)



however in my openwrt 12.09 and on my ubuntu machine i dont see the part in the paranthese, why is that?

ubuntu:
iproute (20120521-3ubuntu1)
3.2.0-23-generic #36-Ubuntu

Because its optional, kernel compilation needs :

CONFIG_CLS_U32_PERF=y