Re: [PATCH] module: ppc64 module CRC relocation fix causes perfissues

[Scott Wood]

On 07/17/2013 11:00:45 PM, Anton Blanchard wrote:
> Hi Scott,
>
> > What specifically should I do to test it?
>
> Could you double check perf annotate works? I'm 99% sure it will but
> that is what was failing on ppc64.

I'm not really sure what it's supposed to look like when "perf  
annotate" works.  It spits a bunch of unreadable[1] dark-blue-on-black  
assembly code at me, all with "0.00 :" in the left column.

Oh, wait -- some lines have "100.00 : " on the left, in  
even-more-unreadable dark-red-on-black.

Apart from the annoying colors, is there anything specific I should be  
looking for?  Some sort of error message, or output that actually makes  
sense?

I've attached the output from "perf annotate" and "perf report".   
perf.data was generated by "perf record find /usr > /dev/null" on an  
NFS root (which took a few seconds to complete), so the large amount of  
__alloc_skb makes some sense, but the way perf annotate shows 100% on  
one instruction in each function seems odd.

-Scott

[1] ...unless I crank the brightness up on my monitor to the point  
where whites are blinding, or redirect the output to a file so the  
colors go away. Percent |	Source code & Disassembly of vmlinux
------------------------------------------------
         :
         :
         :
         :	Disassembly of section .text:
         :
         :	c0097510 <perf_event_comm>:
    0.00 :	c0097510:       94 21 ff a0     stwu    r1,-96(r1)
    0.00 :	c0097514:       7c 08 02 a6     mflr    r0
    0.00 :	c0097518:       bf 01 00 40     stmw    r24,64(r1)
    0.00 :	c009751c:       7c 7e 1b 78     mr      r30,r3
    0.00 :	c0097520:       90 01 00 64     stw     r0,100(r1)
    0.00 :	c0097524:       3b 80 00 00     li      r28,0
    0.00 :	c0097528:       3b 63 04 68     addi    r27,r3,1128
    0.00 :	c009752c:       3b 40 00 00     li      r26,0
    0.00 :	c0097530:       87 bb 00 04     lwzu    r29,4(r27)
    0.00 :	c0097534:       2f 9d 00 00     cmpwi   cr7,r29,0
    0.00 :	c0097538:       41 9e 00 1c     beq-    cr7,c0097554 <perf_event_comm+0x44>
    0.00 :	c009753c:       7f 00 00 a6     mfmsr   r24
    0.00 :	c0097540:       7c 00 01 46     .long 0x7c000146
    0.00 :	c0097544:       80 1d 00 3c     lwz     r0,60(r29)
    0.00 :	c0097548:       2f 80 00 00     cmpwi   cr7,r0,0
    0.00 :	c009754c:       40 9e 00 c4     bne-    cr7,c0097610 <perf_event_comm+0x100>
    0.00 :	c0097550:       7f 00 01 06     .long 0x7f000106
  100.00 :	c0097554:       2f 9c 00 01     cmpwi   cr7,r28,1
    0.00 :	c0097558:       3b 9c 00 01     addi    r28,r28,1
    0.00 :	c009755c:       40 be ff d4     bne-    cr7,c0097530 <perf_event_comm+0x20>
    0.00 :	c0097560:       3d 20 c0 72     lis     r9,-16270
    0.00 :	c0097564:       80 09 99 50     lwz     r0,-26288(r9)
    0.00 :	c0097568:       2f 80 00 00     cmpwi   cr7,r0,0
    0.00 :	c009756c:       41 be 00 88     beq+    cr7,c00975f4 <perf_event_comm+0xe4>
    0.00 :	c0097570:       3b e1 00 08     addi    r31,r1,8
    0.00 :	c0097574:       38 00 00 00     li      r0,0
    0.00 :	c0097578:       39 20 00 03     li      r9,3
    0.00 :	c009757c:       38 9e 01 d8     addi    r4,r30,472
    0.00 :	c0097580:       38 a0 00 10     li      r5,16
    0.00 :	c0097584:       7f e3 fb 78     mr      r3,r31
    0.00 :	c0097588:       90 01 00 1c     stw     r0,28(r1)
    0.00 :	c009758c:       90 01 00 20     stw     r0,32(r1)
    0.00 :	c0097590:       90 01 00 28     stw     r0,40(r1)
    0.00 :	c0097594:       90 01 00 2c     stw     r0,44(r1)
    0.00 :	c0097598:       90 01 00 30     stw     r0,48(r1)
    0.00 :	c009759c:       91 21 00 24     stw     r9,36(r1)
    0.00 :	c00975a0:       90 01 00 08     stw     r0,8(r1)
    0.00 :	c00975a4:       90 01 00 0c     stw     r0,12(r1)
    0.00 :	c00975a8:       90 01 00 10     stw     r0,16(r1)
    0.00 :	c00975ac:       90 01 00 14     stw     r0,20(r1)
    0.00 :	c00975b0:       93 c1 00 18     stw     r30,24(r1)
    0.00 :	c00975b4:       48 1a 05 8d     bl      c0237b40 <strlcpy>
    0.00 :	c00975b8:       7f e3 fb 78     mr      r3,r31
    0.00 :	c00975bc:       4b f8 0e 89     bl      c0018444 <strlen>
    0.00 :	c00975c0:       3c 80 c0 09     lis     r4,-16375
    0.00 :	c00975c4:       39 23 00 08     addi    r9,r3,8
    0.00 :	c00975c8:       93 e1 00 1c     stw     r31,28(r1)
    0.00 :	c00975cc:       55 29 00 38     rlwinm  r9,r9,0,0,28
    0.00 :	c00975d0:       3c 60 c0 09     lis     r3,-16375
    0.00 :	c00975d4:       38 09 00 10     addi    r0,r9,16
    0.00 :	c00975d8:       91 21 00 20     stw     r9,32(r1)
    0.00 :	c00975dc:       38 63 fd 80     addi    r3,r3,-640
    0.00 :	c00975e0:       38 84 65 50     addi    r4,r4,25936
    0.00 :	c00975e4:       38 a1 00 18     addi    r5,r1,24
    0.00 :	c00975e8:       b0 01 00 2a     sth     r0,42(r1)
    0.00 :	c00975ec:       38 c0 00 00     li      r6,0
    0.00 :	c00975f0:       4b ff 86 61     bl      c008fc50 <perf_event_aux>
    0.00 :	c00975f4:       80 01 00 64     lwz     r0,100(r1)
    0.00 :	c00975f8:       bb 01 00 40     lmw     r24,64(r1)
    0.00 :	c00975fc:       38 21 00 60     addi    r1,r1,96
    0.00 :	c0097600:       7c 08 03 a6     mtlr    r0
    0.00 :	c0097604:       4e 80 00 20     blr
    0.00 :	c0097608:       60 00 00 00     nop
    0.00 :	c009760c:       60 00 00 00     nop
    0.00 :	c0097610:       38 7d 00 08     addi    r3,r29,8
    0.00 :	c0097614:       7f b9 eb 78     mr      r25,r29
    0.00 :	c0097618:       48 48 98 a9     bl      c0520ec0 <_raw_spin_lock>
    0.00 :	c009761c:       7f a3 eb 78     mr      r3,r29
    0.00 :	c0097620:       4b ff ce 81     bl      c00944a0 <task_ctx_sched_out>
    0.00 :	c0097624:       87 f9 00 34     lwzu    r31,52(r25)
    0.00 :	c0097628:       7f 99 f8 00     cmpw    cr7,r25,r31
    0.00 :	c009762c:       3b ff ff f8     addi    r31,r31,-8
    0.00 :	c0097630:       41 9e 00 60     beq-    cr7,c0097690 <perf_event_comm+0x180>
    0.00 :	c0097634:       39 60 00 00     li      r11,0
    0.00 :	c0097638:       60 00 00 00     nop
    0.00 :	c009763c:       60 00 00 00     nop
    0.00 :	c0097640:       80 1f 00 a0     lwz     r0,160(r31)
    0.00 :	c0097644:       7c 09 03 78     mr      r9,r0
    0.00 :	c0097648:       74 0a 00 08     andis.  r10,r0,8
    0.00 :	c009764c:       53 49 9b 18     rlwimi  r9,r26,19,12,12
    0.00 :	c0097650:       41 82 00 14     beq-    c0097664 <perf_event_comm+0x154>
    0.00 :	c0097654:       80 1f 00 30     lwz     r0,48(r31)
    0.00 :	c0097658:       91 3f 00 a0     stw     r9,160(r31)
    0.00 :	c009765c:       2f 80 00 00     cmpwi   cr7,r0,0
    0.00 :	c0097660:       41 9c 00 50     blt-    cr7,c00976b0 <perf_event_comm+0x1a0>
    0.00 :	c0097664:       83 ff 00 08     lwz     r31,8(r31)
    0.00 :	c0097668:       7f 99 f8 00     cmpw    cr7,r25,r31
    0.00 :	c009766c:       3b ff ff f8     addi    r31,r31,-8
    0.00 :	c0097670:       40 9e ff d0     bne+    cr7,c0097640 <perf_event_comm+0x130>
    0.00 :	c0097674:       2f 8b 00 00     cmpwi   cr7,r11,0
    0.00 :	c0097678:       41 9e 00 18     beq-    cr7,c0097690 <perf_event_comm+0x180>
    0.00 :	c009767c:       80 7d 00 70     lwz     r3,112(r29)
    0.00 :	c0097680:       2f 83 00 00     cmpwi   cr7,r3,0
    0.00 :	c0097684:       41 9e 00 0c     beq-    cr7,c0097690 <perf_event_comm+0x180>
    0.00 :	c0097688:       4b ff a6 69     bl      c0091cf0 <put_ctx>
    0.00 :	c009768c:       93 5d 00 70     stw     r26,112(r29)
    0.00 :	c0097690:       7c 00 04 ac     sync    
    0.00 :	c0097694:       93 5d 00 08     stw     r26,8(r29)
    0.00 :	c0097698:       7f a3 eb 78     mr      r3,r29
    0.00 :	c009769c:       4b ff e1 75     bl      c0095810 <perf_event_context_sched_in.clone.38>
    0.00 :	c00976a0:       4b ff fe b0     b       c0097550 <perf_event_comm+0x40>
    0.00 :	c00976a4:       60 00 00 00     nop
    0.00 :	c00976a8:       60 00 00 00     nop
    0.00 :	c00976ac:       60 00 00 00     nop
    0.00 :	c00976b0:       7f e3 fb 78     mr      r3,r31
    0.00 :	c00976b4:       4b ff 83 cd     bl      c008fa80 <__perf_event_mark_enabled>
    0.00 :	c00976b8:       39 60 00 01     li      r11,1
    0.00 :	c00976bc:       4b ff ff a8     b       c0097664 <perf_event_comm+0x154>
 Percent |	Source code & Disassembly of vmlinux
------------------------------------------------
         :
         :
         :
         :	Disassembly of section .text:
         :
         :	c00368c0 <mod_timer>:
  100.00 :	c00368c0:       94 21 ff d0     stwu    r1,-48(r1)
    0.00 :	c00368c4:       7c 08 02 a6     mflr    r0
    0.00 :	c00368c8:       bf 61 00 1c     stmw    r27,28(r1)
    0.00 :	c00368cc:       7c 7f 1b 78     mr      r31,r3
    0.00 :	c00368d0:       90 01 00 34     stw     r0,52(r1)
    0.00 :	c00368d4:       7c 9e 23 78     mr      r30,r4
    0.00 :	c00368d8:       83 a3 00 18     lwz     r29,24(r3)
    0.00 :	c00368dc:       2f 9d 00 00     cmpwi   cr7,r29,0
    0.00 :	c00368e0:       41 9c 01 70     blt-    cr7,c0036a50 <mod_timer+0x190>
    0.00 :	c00368e4:       7f bd f2 14     add     r29,r29,r30
    0.00 :	c00368e8:       7f a0 f2 78     xor     r0,r29,r30
    0.00 :	c00368ec:       2f 80 00 00     cmpwi   cr7,r0,0
    0.00 :	c00368f0:       90 01 00 08     stw     r0,8(r1)
    0.00 :	c00368f4:       40 9e 01 8c     bne-    cr7,c0036a80 <mod_timer+0x1c0>
    0.00 :	c00368f8:       80 1f 00 00     lwz     r0,0(r31)
    0.00 :	c00368fc:       2f 80 00 00     cmpwi   cr7,r0,0
    0.00 :	c0036900:       41 9e 01 ac     beq-    cr7,c0036aac <mod_timer+0x1ec>
    0.00 :	c0036904:       80 1f 00 08     lwz     r0,8(r31)
    0.00 :	c0036908:       3b 80 00 01     li      r28,1
    0.00 :	c003690c:       7f 80 f0 00     cmpw    cr7,r0,r30
    0.00 :	c0036910:       41 9e 00 f0     beq-    cr7,c0036a00 <mod_timer+0x140>
    0.00 :	c0036914:       80 1f 00 10     lwz     r0,16(r31)
    0.00 :	c0036918:       7c 00 00 34     cntlzw  r0,r0
    0.00 :	c003691c:       54 00 d9 7e     rlwinm  r0,r0,27,5,31
    0.00 :	c0036920:       0f 00 00 00     twnei   r0,0
    0.00 :	c0036924:       38 7f 00 0c     addi    r3,r31,12
    0.00 :	c0036928:       38 81 00 08     addi    r4,r1,8
    0.00 :	c003692c:       4b ff f9 75     bl      c00362a0 <lock_timer_base.clone.24>
    0.00 :	c0036930:       81 3f 00 00     lwz     r9,0(r31)
    0.00 :	c0036934:       7c 7b 1b 78     mr      r27,r3
    0.00 :	c0036938:       3b 80 00 00     li      r28,0
    0.00 :	c003693c:       2f 89 00 00     cmpwi   cr7,r9,0
    0.00 :	c0036940:       41 9e 00 2c     beq-    cr7,c003696c <mod_timer+0xac>
    0.00 :	c0036944:       81 7f 00 04     lwz     r11,4(r31)
    0.00 :	c0036948:       3c 00 00 20     lis     r0,32
    0.00 :	c003694c:       60 00 02 00     ori     r0,r0,512
    0.00 :	c0036950:       3b 80 00 01     li      r28,1
    0.00 :	c0036954:       91 69 00 04     stw     r11,4(r9)
    0.00 :	c0036958:       91 2b 00 00     stw     r9,0(r11)
    0.00 :	c003695c:       90 1f 00 04     stw     r0,4(r31)
    0.00 :	c0036960:       80 1f 00 0c     lwz     r0,12(r31)
    0.00 :	c0036964:       70 09 00 01     andi.   r9,r0,1
    0.00 :	c0036968:       41 82 00 b8     beq-    c0036a20 <mod_timer+0x160>
    0.00 :	c003696c:       3d 20 c0 72     lis     r9,-16270
    0.00 :	c0036970:       80 09 98 ec     lwz     r0,-26388(r9)
    0.00 :	c0036974:       54 29 00 24     rlwinm  r9,r1,0,0,18
    0.00 :	c0036978:       83 a9 00 08     lwz     r29,8(r9)
    0.00 :	c003697c:       2f 80 00 00     cmpwi   cr7,r0,0
    0.00 :	c0036980:       40 9e 01 40     bne-    cr7,c0036ac0 <mod_timer+0x200>
    0.00 :	c0036984:       3d 20 c0 72     lis     r9,-16270
    0.00 :	c0036988:       57 bd 10 3a     rlwinm  r29,r29,2,0,29
    0.00 :	c003698c:       39 29 9b 40     addi    r9,r9,-25792
    0.00 :	c0036990:       7d 69 e8 2e     lwzx    r11,r9,r29
    0.00 :	c0036994:       3d 20 c0 6d     lis     r9,-16275
    0.00 :	c0036998:       39 29 04 70     addi    r9,r9,1136
    0.00 :	c003699c:       7f ab 48 2e     lwzx    r29,r11,r9
    0.00 :	c00369a0:       7f 9b e8 00     cmpw    cr7,r27,r29
    0.00 :	c00369a4:       41 9e 00 40     beq-    cr7,c00369e4 <mod_timer+0x124>
    0.00 :	c00369a8:       80 1b 00 04     lwz     r0,4(r27)
    0.00 :	c00369ac:       7f 9f 00 00     cmpw    cr7,r31,r0
    0.00 :	c00369b0:       41 9e 01 2c     beq-    cr7,c0036adc <mod_timer+0x21c>
    0.00 :	c00369b4:       80 1f 00 0c     lwz     r0,12(r31)
    0.00 :	c00369b8:       54 00 07 be     clrlwi  r0,r0,30
    0.00 :	c00369bc:       90 1f 00 0c     stw     r0,12(r31)
    0.00 :	c00369c0:       7c 00 04 ac     sync    
    0.00 :	c00369c4:       38 00 00 00     li      r0,0
    0.00 :	c00369c8:       90 1b 00 00     stw     r0,0(r27)
    0.00 :	c00369cc:       7f a3 eb 78     mr      r3,r29
    0.00 :	c00369d0:       48 4e a4 f1     bl      c0520ec0 <_raw_spin_lock>
    0.00 :	c00369d4:       80 1f 00 0c     lwz     r0,12(r31)
    0.00 :	c00369d8:       54 00 07 be     clrlwi  r0,r0,30
    0.00 :	c00369dc:       7f a0 03 78     or      r0,r29,r0
    0.00 :	c00369e0:       90 1f 00 0c     stw     r0,12(r31)
    0.00 :	c00369e4:       93 df 00 08     stw     r30,8(r31)
    0.00 :	c00369e8:       7f e4 fb 78     mr      r4,r31
    0.00 :	c00369ec:       7f a3 eb 78     mr      r3,r29
    0.00 :	c00369f0:       4b ff f1 d1     bl      c0035bc0 <internal_add_timer>
    0.00 :	c00369f4:       80 81 00 08     lwz     r4,8(r1)
    0.00 :	c00369f8:       7f a3 eb 78     mr      r3,r29
    0.00 :	c00369fc:       48 4e 9e 65     bl      c0520860 <_raw_spin_unlock_irqrestore>
    0.00 :	c0036a00:       80 01 00 34     lwz     r0,52(r1)
    0.00 :	c0036a04:       7f 83 e3 78     mr      r3,r28
    0.00 :	c0036a08:       bb 61 00 1c     lmw     r27,28(r1)
    0.00 :	c0036a0c:       38 21 00 30     addi    r1,r1,48
    0.00 :	c0036a10:       7c 08 03 a6     mtlr    r0
    0.00 :	c0036a14:       4e 80 00 20     blr
    0.00 :	c0036a18:       60 00 00 00     nop
    0.00 :	c0036a1c:       60 00 00 00     nop
    0.00 :	c0036a20:       81 23 00 10     lwz     r9,16(r3)
    0.00 :	c0036a24:       80 03 00 0c     lwz     r0,12(r3)
    0.00 :	c0036a28:       39 29 ff ff     addi    r9,r9,-1
    0.00 :	c0036a2c:       91 23 00 10     stw     r9,16(r3)
    0.00 :	c0036a30:       81 3f 00 08     lwz     r9,8(r31)
    0.00 :	c0036a34:       7f 89 00 00     cmpw    cr7,r9,r0
    0.00 :	c0036a38:       40 9e ff 34     bne+    cr7,c003696c <mod_timer+0xac>
    0.00 :	c0036a3c:       80 03 00 08     lwz     r0,8(r3)
    0.00 :	c0036a40:       90 03 00 0c     stw     r0,12(r3)
    0.00 :	c0036a44:       4b ff ff 28     b       c003696c <mod_timer+0xac>
    0.00 :	c0036a48:       60 00 00 00     nop
    0.00 :	c0036a4c:       60 00 00 00     nop
    0.00 :	c0036a50:       3d 20 c0 71     lis     r9,-16271
    0.00 :	c0036a54:       83 a9 30 c4     lwz     r29,12484(r9)
    0.00 :	c0036a58:       7f bd 20 50     subf    r29,r29,r4
    0.00 :	c0036a5c:       2f 9d 00 ff     cmpwi   cr7,r29,255
    0.00 :	c0036a60:       40 bd fe 98     ble-    cr7,c00368f8 <mod_timer+0x38>
    0.00 :	c0036a64:       7f bd 46 70     srawi   r29,r29,8
    0.00 :	c0036a68:       7f bd f2 14     add     r29,r29,r30
    0.00 :	c0036a6c:       7f a0 f2 78     xor     r0,r29,r30
    0.00 :	c0036a70:       2f 80 00 00     cmpwi   cr7,r0,0
    0.00 :	c0036a74:       90 01 00 08     stw     r0,8(r1)
    0.00 :	c0036a78:       41 9e fe 80     beq+    cr7,c00368f8 <mod_timer+0x38>
    0.00 :	c0036a7c:       60 00 00 00     nop
    0.00 :	c0036a80:       38 61 00 08     addi    r3,r1,8
    0.00 :	c0036a84:       38 80 00 20     li      r4,32
    0.00 :	c0036a88:       48 20 94 39     bl      c023fec0 <find_last_bit>
    0.00 :	c0036a8c:       80 1f 00 00     lwz     r0,0(r31)
    0.00 :	c0036a90:       3b c0 00 01     li      r30,1
    0.00 :	c0036a94:       7f de 18 30     slw     r30,r30,r3
    0.00 :	c0036a98:       3b de ff ff     addi    r30,r30,-1
    0.00 :	c0036a9c:       2f 80 00 00     cmpwi   cr7,r0,0
    0.00 :	c0036aa0:       93 c1 00 08     stw     r30,8(r1)
    0.00 :	c0036aa4:       7f be f0 78     andc    r30,r29,r30
    0.00 :	c0036aa8:       40 9e fe 5c     bne+    cr7,c0036904 <mod_timer+0x44>
    0.00 :	c0036aac:       81 3f 00 10     lwz     r9,16(r31)
    0.00 :	c0036ab0:       2f 89 00 00     cmpwi   cr7,r9,0
    0.00 :	c0036ab4:       39 20 00 01     li      r9,1
    0.00 :	c0036ab8:       7c 09 07 9e     .long 0x7c09079e
    0.00 :	c0036abc:       4b ff fe 64     b       c0036920 <mod_timer+0x60>
    0.00 :	c0036ac0:       7f a3 eb 78     mr      r3,r29
    0.00 :	c0036ac4:       48 02 29 bd     bl      c0059480 <idle_cpu>
    0.00 :	c0036ac8:       2f 83 00 00     cmpwi   cr7,r3,0
    0.00 :	c0036acc:       41 9e fe b8     beq+    cr7,c0036984 <mod_timer+0xc4>
    0.00 :	c0036ad0:       48 02 2c d1     bl      c00597a0 <get_nohz_timer_target>
    0.00 :	c0036ad4:       7c 7d 1b 78     mr      r29,r3
    0.00 :	c0036ad8:       4b ff fe ac     b       c0036984 <mod_timer+0xc4>
    0.00 :	c0036adc:       7f 7d db 78     mr      r29,r27
    0.00 :	c0036ae0:       4b ff ff 04     b       c00369e4 <mod_timer+0x124>
 Percent |	Source code & Disassembly of vmlinux
------------------------------------------------
         :
         :
         :
         :	Disassembly of section .text:
         :
         :	c0096550 <perf_event_comm_output>:
  100.00 :	c0096550:       94 21 ff 30     stwu    r1,-208(r1)
    0.00 :	c0096554:       7c 08 02 a6     mflr    r0
    0.00 :	c0096558:       bf 21 00 b4     stmw    r25,180(r1)
    0.00 :	c009655c:       7c 7b 1b 78     mr      r27,r3
    0.00 :	c0096560:       90 01 00 d4     stw     r0,212(r1)
    0.00 :	c0096564:       3b e4 00 0c     addi    r31,r4,12
    0.00 :	c0096568:       7c 9c 23 78     mr      r28,r4
    0.00 :	c009656c:       7f e3 fb 78     mr      r3,r31
    0.00 :	c0096570:       38 81 00 20     addi    r4,r1,32
    0.00 :	c0096574:       7f 65 db 78     mr      r5,r27
    0.00 :	c0096578:       a3 3c 00 12     lhz     r25,18(r28)
    0.00 :	c009657c:       4b ff e9 c5     bl      c0094f40 <perf_event_header__init_id>
    0.00 :	c0096580:       a0 bc 00 12     lhz     r5,18(r28)
    0.00 :	c0096584:       38 61 00 08     addi    r3,r1,8
    0.00 :	c0096588:       7f 64 db 78     mr      r4,r27
    0.00 :	c009658c:       48 00 37 e5     bl      c0099d70 <perf_output_begin>
    0.00 :	c0096590:       2f 83 00 00     cmpwi   cr7,r3,0
    0.00 :	c0096594:       41 9e 00 1c     beq-    cr7,c00965b0 <perf_event_comm_output+0x60>
    0.00 :	c0096598:       b3 3c 00 12     sth     r25,18(r28)
    0.00 :	c009659c:       80 01 00 d4     lwz     r0,212(r1)
    0.00 :	c00965a0:       bb 21 00 b4     lmw     r25,180(r1)
    0.00 :	c00965a4:       38 21 00 d0     addi    r1,r1,208
    0.00 :	c00965a8:       7c 08 03 a6     mtlr    r0
    0.00 :	c00965ac:       4e 80 00 20     blr
    0.00 :	c00965b0:       80 9c 00 00     lwz     r4,0(r28)
    0.00 :	c00965b4:       7f 63 db 78     mr      r3,r27
    0.00 :	c00965b8:       3b 40 10 00     li      r26,4096
    0.00 :	c00965bc:       4b ff b9 d5     bl      c0091f90 <perf_event_pid>
    0.00 :	c00965c0:       80 9c 00 00     lwz     r4,0(r28)
    0.00 :	c00965c4:       90 7c 00 14     stw     r3,20(r28)
    0.00 :	c00965c8:       7f 63 db 78     mr      r3,r27
    0.00 :	c00965cc:       4b ff ba 05     bl      c0091fd0 <perf_event_tid>
    0.00 :	c00965d0:       7f e4 fb 78     mr      r4,r31
    0.00 :	c00965d4:       90 7c 00 18     stw     r3,24(r28)
    0.00 :	c00965d8:       38 a0 00 10     li      r5,16
    0.00 :	c00965dc:       38 61 00 08     addi    r3,r1,8
    0.00 :	c00965e0:       48 00 36 d1     bl      c0099cb0 <perf_output_copy>
    0.00 :	c00965e4:       83 dc 00 08     lwz     r30,8(r28)
    0.00 :	c00965e8:       83 bc 00 04     lwz     r29,4(r28)
    0.00 :	c00965ec:       60 00 00 00     nop
    0.00 :	c00965f0:       83 e1 00 14     lwz     r31,20(r1)
    0.00 :	c00965f4:       7f a4 eb 78     mr      r4,r29
    0.00 :	c00965f8:       80 61 00 18     lwz     r3,24(r1)
    0.00 :	c00965fc:       7f 9e f8 40     cmplw   cr7,r30,r31
    0.00 :	c0096600:       7f fe ff 1e     .long 0x7ffeff1e
    0.00 :	c0096604:       7f e5 fb 78     mr      r5,r31
    0.00 :	c0096608:       7f df f0 50     subf    r30,r31,r30
    0.00 :	c009660c:       4b f8 24 4d     bl      c0018a58 <memcpy>
    0.00 :	c0096610:       80 01 00 14     lwz     r0,20(r1)
    0.00 :	c0096614:       81 21 00 18     lwz     r9,24(r1)
    0.00 :	c0096618:       2f 9e 00 00     cmpwi   cr7,r30,0
    0.00 :	c009661c:       7f bd fa 14     add     r29,r29,r31
    0.00 :	c0096620:       7c 1f 00 50     subf    r0,r31,r0
    0.00 :	c0096624:       7d 29 fa 14     add     r9,r9,r31
    0.00 :	c0096628:       2f 00 00 00     cmpwi   cr6,r0,0
    0.00 :	c009662c:       91 21 00 18     stw     r9,24(r1)
    0.00 :	c0096630:       90 01 00 14     stw     r0,20(r1)
    0.00 :	c0096634:       40 9a 00 3c     bne-    cr6,c0096670 <perf_event_comm_output+0x120>
    0.00 :	c0096638:       81 61 00 1c     lwz     r11,28(r1)
    0.00 :	c009663c:       81 21 00 0c     lwz     r9,12(r1)
    0.00 :	c0096640:       38 0b 00 01     addi    r0,r11,1
    0.00 :	c0096644:       90 01 00 1c     stw     r0,28(r1)
    0.00 :	c0096648:       81 69 00 0c     lwz     r11,12(r9)
    0.00 :	c009664c:       39 6b ff ff     addi    r11,r11,-1
    0.00 :	c0096650:       7d 6b 00 38     and     r11,r11,r0
    0.00 :	c0096654:       91 61 00 1c     stw     r11,28(r1)
    0.00 :	c0096658:       39 6b 00 10     addi    r11,r11,16
    0.00 :	c009665c:       55 6b 10 3a     rlwinm  r11,r11,2,0,29
    0.00 :	c0096660:       7d 29 5a 14     add     r9,r9,r11
    0.00 :	c0096664:       80 09 00 0c     lwz     r0,12(r9)
    0.00 :	c0096668:       93 41 00 14     stw     r26,20(r1)
    0.00 :	c009666c:       90 01 00 18     stw     r0,24(r1)
    0.00 :	c0096670:       40 9e ff 80     bne+    cr7,c00965f0 <perf_event_comm_output+0xa0>
    0.00 :	c0096674:       7f 63 db 78     mr      r3,r27
    0.00 :	c0096678:       38 81 00 08     addi    r4,r1,8
    0.00 :	c009667c:       38 a1 00 20     addi    r5,r1,32
    0.00 :	c0096680:       4b ff e8 e1     bl      c0094f60 <perf_event__output_id_sample>
    0.00 :	c0096684:       38 61 00 08     addi    r3,r1,8
    0.00 :	c0096688:       48 00 39 c9     bl      c009a050 <perf_output_end>
    0.00 :	c009668c:       b3 3c 00 12     sth     r25,18(r28)
    0.00 :	c0096690:       80 01 00 d4     lwz     r0,212(r1)
    0.00 :	c0096694:       bb 21 00 b4     lmw     r25,180(r1)
    0.00 :	c0096698:       38 21 00 d0     addi    r1,r1,208
    0.00 :	c009669c:       7c 08 03 a6     mtlr    r0
    0.00 :	c00966a0:       4e 80 00 20     blr
 Percent |	Source code & Disassembly of vmlinux
------------------------------------------------
         :
         :
         :
         :	Disassembly of section .text:
         :
         :	c0235580 <__rb_insert_augmented>:
    0.00 :	c0235580:       94 21 ff e0     stwu    r1,-32(r1)
    0.00 :	c0235584:       7c 08 02 a6     mflr    r0
    0.00 :	c0235588:       bf 81 00 10     stmw    r28,16(r1)
    0.00 :	c023558c:       7c 9f 23 78     mr      r31,r4
    0.00 :	c0235590:       90 01 00 24     stw     r0,36(r1)
    0.00 :	c0235594:       90 a1 00 08     stw     r5,8(r1)
    0.00 :	c0235598:       81 23 00 00     lwz     r9,0(r3)
    0.00 :	c023559c:       2f 89 00 00     cmpwi   cr7,r9,0
    0.00 :	c02355a0:       41 9e 01 9c     beq-    cr7,c023573c <__rb_insert_augmented+0x1bc>
    0.00 :	c02355a4:       83 c9 00 00     lwz     r30,0(r9)
    0.00 :	c02355a8:       73 c0 00 01     andi.   r0,r30,1
    0.00 :	c02355ac:       40 82 00 8c     bne-    c0235638 <__rb_insert_augmented+0xb8>
    0.00 :	c02355b0:       81 7e 00 04     lwz     r11,4(r30)
    0.00 :	c02355b4:       63 c0 00 01     ori     r0,r30,1
    0.00 :	c02355b8:       7f c8 f3 78     mr      r8,r30
    0.00 :	c02355bc:       7f 89 58 00     cmpw    cr7,r9,r11
  100.00 :	c02355c0:       2f 0b 00 00     cmpwi   cr6,r11,0
    0.00 :	c02355c4:       41 9e 00 8c     beq-    cr7,c0235650 <__rb_insert_augmented+0xd0>
    0.00 :	c02355c8:       41 9a 00 10     beq-    cr6,c02355d8 <__rb_insert_augmented+0x58>
    0.00 :	c02355cc:       81 4b 00 00     lwz     r10,0(r11)
    0.00 :	c02355d0:       71 47 00 01     andi.   r7,r10,1
    0.00 :	c02355d4:       41 82 00 9c     beq-    c0235670 <__rb_insert_augmented+0xf0>
    0.00 :	c02355d8:       83 a9 00 04     lwz     r29,4(r9)
    0.00 :	c02355dc:       7d 3c 4b 78     mr      r28,r9
    0.00 :	c02355e0:       7f 9d 18 00     cmpw    cr7,r29,r3
    0.00 :	c02355e4:       41 9e 00 fc     beq-    cr7,c02356e0 <__rb_insert_augmented+0x160>
    0.00 :	c02355e8:       2f 9d 00 00     cmpwi   cr7,r29,0
    0.00 :	c02355ec:       93 be 00 08     stw     r29,8(r30)
    0.00 :	c02355f0:       93 c9 00 04     stw     r30,4(r9)
    0.00 :	c02355f4:       41 9e 00 0c     beq-    cr7,c0235600 <__rb_insert_augmented+0x80>
    0.00 :	c02355f8:       63 c0 00 01     ori     r0,r30,1
    0.00 :	c02355fc:       90 1d 00 00     stw     r0,0(r29)
    0.00 :	c0235600:       80 1e 00 00     lwz     r0,0(r30)
    0.00 :	c0235604:       54 0b 00 3b     rlwinm. r11,r0,0,0,29
    0.00 :	c0235608:       90 09 00 00     stw     r0,0(r9)
    0.00 :	c023560c:       93 9e 00 00     stw     r28,0(r30)
    0.00 :	c0235610:       41 82 00 c0     beq-    c02356d0 <__rb_insert_augmented+0x150>
    0.00 :	c0235614:       80 0b 00 08     lwz     r0,8(r11)
    0.00 :	c0235618:       7f 80 f0 00     cmpw    cr7,r0,r30
    0.00 :	c023561c:       41 9e 01 14     beq-    cr7,c0235730 <__rb_insert_augmented+0x1b0>
    0.00 :	c0235620:       91 2b 00 04     stw     r9,4(r11)
    0.00 :	c0235624:       80 01 00 08     lwz     r0,8(r1)
    0.00 :	c0235628:       7f c3 f3 78     mr      r3,r30
    0.00 :	c023562c:       7d 24 4b 78     mr      r4,r9
    0.00 :	c0235630:       7c 09 03 a6     mtctr   r0
    0.00 :	c0235634:       4e 80 04 21     bctrl
    0.00 :	c0235638:       80 01 00 24     lwz     r0,36(r1)
    0.00 :	c023563c:       bb 81 00 10     lmw     r28,16(r1)
    0.00 :	c0235640:       38 21 00 20     addi    r1,r1,32
    0.00 :	c0235644:       7c 08 03 a6     mtlr    r0
    0.00 :	c0235648:       4e 80 00 20     blr
    0.00 :	c023564c:       60 00 00 00     nop
    0.00 :	c0235650:       81 7e 00 08     lwz     r11,8(r30)
    0.00 :	c0235654:       63 c0 00 01     ori     r0,r30,1
    0.00 :	c0235658:       2f 8b 00 00     cmpwi   cr7,r11,0
    0.00 :	c023565c:       41 9e 00 44     beq-    cr7,c02356a0 <__rb_insert_augmented+0x120>
    0.00 :	c0235660:       81 4b 00 00     lwz     r10,0(r11)
    0.00 :	c0235664:       71 47 00 01     andi.   r7,r10,1
    0.00 :	c0235668:       40 82 00 38     bne-    c02356a0 <__rb_insert_augmented+0x120>
    0.00 :	c023566c:       60 00 00 00     nop
    0.00 :	c0235670:       90 0b 00 00     stw     r0,0(r11)
    0.00 :	c0235674:       90 09 00 00     stw     r0,0(r9)
    0.00 :	c0235678:       81 3e 00 00     lwz     r9,0(r30)
    0.00 :	c023567c:       55 29 00 3a     rlwinm  r9,r9,0,0,29
    0.00 :	c0235680:       2f 89 00 00     cmpwi   cr7,r9,0
    0.00 :	c0235684:       91 3e 00 00     stw     r9,0(r30)
    0.00 :	c0235688:       41 9e 00 b0     beq-    cr7,c0235738 <__rb_insert_augmented+0x1b8>
    0.00 :	c023568c:       83 c9 00 00     lwz     r30,0(r9)
    0.00 :	c0235690:       7d 03 43 78     mr      r3,r8
    0.00 :	c0235694:       73 c7 00 01     andi.   r7,r30,1
    0.00 :	c0235698:       41 82 ff 18     beq+    c02355b0 <__rb_insert_augmented+0x30>
    0.00 :	c023569c:       4b ff ff 9c     b       c0235638 <__rb_insert_augmented+0xb8>
    0.00 :	c02356a0:       83 a9 00 08     lwz     r29,8(r9)
    0.00 :	c02356a4:       7d 3c 4b 78     mr      r28,r9
    0.00 :	c02356a8:       7f 9d 18 00     cmpw    cr7,r29,r3
    0.00 :	c02356ac:       41 9e 00 a4     beq-    cr7,c0235750 <__rb_insert_augmented+0x1d0>
    0.00 :	c02356b0:       2f 9d 00 00     cmpwi   cr7,r29,0
    0.00 :	c02356b4:       93 be 00 04     stw     r29,4(r30)
    0.00 :	c02356b8:       93 c9 00 08     stw     r30,8(r9)
    0.00 :	c02356bc:       40 9e ff 3c     bne+    cr7,c02355f8 <__rb_insert_augmented+0x78>
    0.00 :	c02356c0:       4b ff ff 40     b       c0235600 <__rb_insert_augmented+0x80>
    0.00 :	c02356c4:       60 00 00 00     nop
    0.00 :	c02356c8:       60 00 00 00     nop
    0.00 :	c02356cc:       60 00 00 00     nop
    0.00 :	c02356d0:       91 3f 00 00     stw     r9,0(r31)
    0.00 :	c02356d4:       4b ff ff 50     b       c0235624 <__rb_insert_augmented+0xa4>
    0.00 :	c02356d8:       60 00 00 00     nop
    0.00 :	c02356dc:       60 00 00 00     nop
    0.00 :	c02356e0:       81 63 00 08     lwz     r11,8(r3)
    0.00 :	c02356e4:       2f 8b 00 00     cmpwi   cr7,r11,0
    0.00 :	c02356e8:       91 69 00 04     stw     r11,4(r9)
    0.00 :	c02356ec:       91 23 00 08     stw     r9,8(r3)
    0.00 :	c02356f0:       41 9e 00 0c     beq-    cr7,c02356fc <__rb_insert_augmented+0x17c>
    0.00 :	c02356f4:       61 20 00 01     ori     r0,r9,1
    0.00 :	c02356f8:       90 0b 00 00     stw     r0,0(r11)
    0.00 :	c02356fc:       80 01 00 08     lwz     r0,8(r1)
    0.00 :	c0235700:       7d 23 4b 78     mr      r3,r9
    0.00 :	c0235704:       93 a9 00 00     stw     r29,0(r9)
    0.00 :	c0235708:       7f a4 eb 78     mr      r4,r29
    0.00 :	c023570c:       7f bc eb 78     mr      r28,r29
    0.00 :	c0235710:       7c 09 03 a6     mtctr   r0
    0.00 :	c0235714:       4e 80 04 21     bctrl
    0.00 :	c0235718:       7f a9 eb 78     mr      r9,r29
    0.00 :	c023571c:       83 bd 00 04     lwz     r29,4(r29)
    0.00 :	c0235720:       4b ff fe c8     b       c02355e8 <__rb_insert_augmented+0x68>
    0.00 :	c0235724:       60 00 00 00     nop
    0.00 :	c0235728:       60 00 00 00     nop
    0.00 :	c023572c:       60 00 00 00     nop
    0.00 :	c0235730:       91 2b 00 08     stw     r9,8(r11)
    0.00 :	c0235734:       4b ff fe f0     b       c0235624 <__rb_insert_augmented+0xa4>
    0.00 :	c0235738:       7f c3 f3 78     mr      r3,r30
    0.00 :	c023573c:       38 00 00 01     li      r0,1
    0.00 :	c0235740:       90 03 00 00     stw     r0,0(r3)
    0.00 :	c0235744:       4b ff fe f4     b       c0235638 <__rb_insert_augmented+0xb8>
    0.00 :	c0235748:       60 00 00 00     nop
    0.00 :	c023574c:       60 00 00 00     nop
    0.00 :	c0235750:       81 63 00 04     lwz     r11,4(r3)
    0.00 :	c0235754:       2f 8b 00 00     cmpwi   cr7,r11,0
    0.00 :	c0235758:       91 69 00 08     stw     r11,8(r9)
    0.00 :	c023575c:       91 23 00 04     stw     r9,4(r3)
    0.00 :	c0235760:       41 9e 00 0c     beq-    cr7,c023576c <__rb_insert_augmented+0x1ec>
    0.00 :	c0235764:       61 20 00 01     ori     r0,r9,1
    0.00 :	c0235768:       90 0b 00 00     stw     r0,0(r11)
    0.00 :	c023576c:       80 01 00 08     lwz     r0,8(r1)
    0.00 :	c0235770:       7d 23 4b 78     mr      r3,r9
    0.00 :	c0235774:       93 a9 00 00     stw     r29,0(r9)
    0.00 :	c0235778:       7f a4 eb 78     mr      r4,r29
    0.00 :	c023577c:       7f bc eb 78     mr      r28,r29
    0.00 :	c0235780:       7c 09 03 a6     mtctr   r0
    0.00 :	c0235784:       4e 80 04 21     bctrl
    0.00 :	c0235788:       7f a9 eb 78     mr      r9,r29
    0.00 :	c023578c:       83 bd 00 08     lwz     r29,8(r29)
    0.00 :	c0235790:       4b ff ff 20     b       c02356b0 <__rb_insert_augmented+0x130>
 Percent |	Source code & Disassembly of vmlinux
------------------------------------------------
         :
         :
         :
         :	Disassembly of section .text:
         :
         :	c040b270 <__alloc_skb>:
  100.00 :	c040b270:       94 21 ff d0     stwu    r1,-48(r1)
    0.00 :	c040b274:       7c 08 02 a6     mflr    r0
    0.00 :	c040b278:       7d 80 00 26     mfcr    r12
    0.00 :	c040b27c:       90 01 00 34     stw     r0,52(r1)
    0.00 :	c040b280:       54 a0 07 fe     clrlwi  r0,r5,31
    0.00 :	c040b284:       2e 00 00 00     cmpwi   cr4,r0,0
    0.00 :	c040b288:       bf 81 00 20     stmw    r28,32(r1)
    0.00 :	c040b28c:       91 81 00 1c     stw     r12,28(r1)
    0.00 :	c040b290:       7c 7c 1b 78     mr      r28,r3
    0.00 :	c040b294:       7c 9e 23 78     mr      r30,r4
    0.00 :	c040b298:       41 92 01 18     beq-    cr4,c040b3b0 <__alloc_skb+0x140>
    0.00 :	c040b29c:       3d 20 c0 72     lis     r9,-16270
    0.00 :	c040b2a0:       83 a9 9e 50     lwz     r29,-25008(r9)
    0.00 :	c040b2a4:       3d 20 c0 72     lis     r9,-16270
    0.00 :	c040b2a8:       80 09 c4 3c     lwz     r0,-15300(r9)
    0.00 :	c040b2ac:       2f 80 00 00     cmpwi   cr7,r0,0
    0.00 :	c040b2b0:       40 9e 01 24     bne-    cr7,c040b3d4 <__alloc_skb+0x164>
    0.00 :	c040b2b4:       7f a3 eb 78     mr      r3,r29
    0.00 :	c040b2b8:       57 c4 00 3c     rlwinm  r4,r30,0,0,30
    0.00 :	c040b2bc:       4b cd 04 25     bl      c00db6e0 <kmem_cache_alloc>
    0.00 :	c040b2c0:       7c 7f 1b 79     mr.     r31,r3
    0.00 :	c040b2c4:       41 82 00 c4     beq-    c040b388 <__alloc_skb+0x118>
    0.00 :	c040b2c8:       7c 00 f9 ec     dcbtst  r0,r31
    0.00 :	c040b2cc:       3b 9c 00 3f     addi    r28,r28,63
    0.00 :	c040b2d0:       7f c4 f3 78     mr      r4,r30
    0.00 :	c040b2d4:       57 83 00 32     rlwinm  r3,r28,0,0,25
    0.00 :	c040b2d8:       38 a1 00 08     addi    r5,r1,8
    0.00 :	c040b2dc:       38 63 00 c0     addi    r3,r3,192
    0.00 :	c040b2e0:       4b ff ff 01     bl      c040b1e0 <__kmalloc_reserve.clone.56>
    0.00 :	c040b2e4:       7c 7e 1b 79     mr.     r30,r3
    0.00 :	c040b2e8:       41 82 00 d8     beq-    c040b3c0 <__alloc_skb+0x150>
    0.00 :	c040b2ec:       4b cc ec 45     bl      c00d9f30 <ksize>
    0.00 :	c040b2f0:       3b 83 ff 40     addi    r28,r3,-192
    0.00 :	c040b2f4:       7f be e2 15     add.    r29,r30,r28
    0.00 :	c040b2f8:       41 82 00 08     beq-    c040b300 <__alloc_skb+0x90>
    0.00 :	c040b2fc:       7c 00 e9 ec     dcbtst  r0,r29
    0.00 :	c040b300:       7f e3 fb 78     mr      r3,r31
    0.00 :	c040b304:       38 80 00 00     li      r4,0
    0.00 :	c040b308:       38 a0 00 98     li      r5,152
    0.00 :	c040b30c:       3b 9c 01 80     addi    r28,r28,384
    0.00 :	c040b310:       4b c0 d5 9d     bl      c00188ac <memset>
    0.00 :	c040b314:       89 21 00 08     lbz     r9,8(r1)
    0.00 :	c040b318:       38 00 00 00     li      r0,0
    0.00 :	c040b31c:       93 9f 00 a8     stw     r28,168(r31)
    0.00 :	c040b320:       3b 80 00 01     li      r28,1
    0.00 :	c040b324:       51 20 6c a4     rlwimi  r0,r9,13,18,18
    0.00 :	c040b328:       90 1f 00 78     stw     r0,120(r31)
    0.00 :	c040b32c:       93 9f 00 ac     stw     r28,172(r31)
    0.00 :	c040b330:       93 df 00 a0     stw     r30,160(r31)
    0.00 :	c040b334:       7f a3 eb 78     mr      r3,r29
    0.00 :	c040b338:       93 df 00 a4     stw     r30,164(r31)
    0.00 :	c040b33c:       38 80 00 00     li      r4,0
    0.00 :	c040b340:       93 df 00 98     stw     r30,152(r31)
    0.00 :	c040b344:       38 a0 00 24     li      r5,36
    0.00 :	c040b348:       93 bf 00 9c     stw     r29,156(r31)
    0.00 :	c040b34c:       4b c0 d5 61     bl      c00188ac <memset>
    0.00 :	c040b350:       93 9d 00 24     stw     r28,36(r29)
    0.00 :	c040b354:       41 92 00 34     beq-    cr4,c040b388 <__alloc_skb+0x118>
    0.00 :	c040b358:       80 1f 00 64     lwz     r0,100(r31)
    0.00 :	c040b35c:       53 80 9a d8     rlwimi  r0,r28,19,11,12
    0.00 :	c040b360:       90 1f 00 64     stw     r0,100(r31)
    0.00 :	c040b364:       93 9f 01 60     stw     r28,352(r31)
    0.00 :	c040b368:       81 7f 01 14     lwz     r11,276(r31)
    0.00 :	c040b36c:       39 40 00 00     li      r10,0
    0.00 :	c040b370:       80 1f 01 28     lwz     r0,296(r31)
    0.00 :	c040b374:       51 4b 9a d8     rlwimi  r11,r10,19,11,12
    0.00 :	c040b378:       91 7f 01 14     stw     r11,276(r31)
    0.00 :	c040b37c:       89 61 00 08     lbz     r11,8(r1)
    0.00 :	c040b380:       51 60 6c a4     rlwimi  r0,r11,13,18,18
    0.00 :	c040b384:       90 1f 01 28     stw     r0,296(r31)
    0.00 :	c040b388:       80 01 00 34     lwz     r0,52(r1)
    0.00 :	c040b38c:       7f e3 fb 78     mr      r3,r31
    0.00 :	c040b390:       81 81 00 1c     lwz     r12,28(r1)
    0.00 :	c040b394:       bb 81 00 20     lmw     r28,32(r1)
    0.00 :	c040b398:       38 21 00 30     addi    r1,r1,48
    0.00 :	c040b39c:       7c 08 03 a6     mtlr    r0
    0.00 :	c040b3a0:       7d 80 81 20     mtcrf   8,r12
    0.00 :	c040b3a4:       4e 80 00 20     blr
    0.00 :	c040b3a8:       60 00 00 00     nop
    0.00 :	c040b3ac:       60 00 00 00     nop
    0.00 :	c040b3b0:       3d 20 c0 72     lis     r9,-16270
    0.00 :	c040b3b4:       83 a9 9e 4c     lwz     r29,-25012(r9)
    0.00 :	c040b3b8:       4b ff fe ec     b       c040b2a4 <__alloc_skb+0x34>
    0.00 :	c040b3bc:       60 00 00 00     nop
    0.00 :	c040b3c0:       7f e4 fb 78     mr      r4,r31
    0.00 :	c040b3c4:       7f a3 eb 78     mr      r3,r29
    0.00 :	c040b3c8:       4b cc f0 c9     bl      c00da490 <kmem_cache_free>
    0.00 :	c040b3cc:       3b e0 00 00     li      r31,0
    0.00 :	c040b3d0:       4b ff ff b8     b       c040b388 <__alloc_skb+0x118>
    0.00 :	c040b3d4:       70 a0 00 02     andi.   r0,r5,2
    0.00 :	c040b3d8:       63 c0 20 00     ori     r0,r30,8192
    0.00 :	c040b3dc:       7f de 00 9e     .long 0x7fde009e
    0.00 :	c040b3e0:       4b ff fe d4     b       c040b2b4 <__alloc_skb+0x44>
# Events: 8  cycles
#
# Overhead  Command      Shared Object                  Symbol
# ........  .......  .................  ......................
#
    97.04%     find  [kernel.kallsyms]  [k] __alloc_skb
     2.32%     find  [kernel.kallsyms]  [k] mod_timer
     0.62%     find  [kernel.kallsyms]  [k] __rb_insert_augmented
     0.01%     find  [kernel.kallsyms]  [k] perf_event_comm_output
     0.00%     find  [kernel.kallsyms]  [k] perf_event_comm


#
# (For a higher level overview, try: perf report --sort comm,dso)
#