Hi all,
I am using kvm to fast forward and make a checkpoint. My gem5 version is
https://github.com/darchr/gem5/tree/jason/kvm-testing-again
and I use configs/myconfigs/runkvm.py to run my simulation in FS mode with
custom disk-image and vmlinux-4.8.19 kernel. Here is my command line:
build/X86/gem5.opt --outdir=output/graph/base/1 configs/myconfigs/runkvm.py
--disk=/home/songyifan/gem5kvm/disk/graph.img. I have a couple of questions:
1. The stats of simulation time (both host time and simulated time ) is
different though using the same command line above and configurations.
Sometimes the host time is close to native host machine time (about 26s) and
the gem5 output only contains a few warning like:
warn: ds: S flag not set warn: ds: P flag not set
and m5 terminal showed the booting is normal. On the one hand, sometimes the
host time is long (about 150 min) and the gem5 keeps outputting the warning. I
also checked the m5 terminal which showed:
-bash: cannot set terminal process group (1041): Inappropriate ioctl for device
-bash: no job control in this shell
Also, both can run my application correctly.
2. When I switch my CPU from kvm to O3, I always see the outputs below in m5
terminal:
Ubuntu 16.04.6 LTS localhost.localdomain ttyS0
localhost login: root (automatic login)
Got CPU type: M5 Simulator
Welcome to Ubuntu 16.04.6 LTS (GNU/Linux 4.9.189 x86_64)
* Documentation: https://help.ubuntu.com
* Management: https://landscape.canonical.com
* Support: https://ubuntu.com/advantage
The programs included with the Ubuntu system are free software;
the exact distribution terms for each program are described in the
individual files in /usr/share/doc/*/copyright.
Ubuntu comes with ABSOLUTELY NO WARRANTY, to the extent permitted by
applicable law.
-bash: cannot set terminal process group (1041): Inappropriate ioctl for device
-bash: no job control in this shell
1213
1214
1215
1216
read ending!!!
41652231 1468365178
1
0 0.1000000
1 1.2112147
2
1 1.2112147
BUG: unable to handle kernel paging request at ffffffff81035f80
IP: [<ffffffff81035fb8>] do_page_fault+0x0/0x1f
PGD 180b067 PUD 180c063
PMD 10000e1
Oops: 0010 [#1] SMP
Modules linked in:
CPU: 1 PID: 1118 Comm: gem5init Not tainted 4.9.189 #1
Hardware name: , BIOS 06/08/2008
task: ffff8804ed412880 task.stack: ffffc9000117c000
RIP: 0010:[<ffffffff81035fb8>] [<ffffffff81035fb8>] do_page_fault+0x0/0x1f
RSP: 0000:ffffc9000117ff50 EFLAGS: 0000002e
RAX: 00007f66d448e2c8 RBX: 00007f66d4ea49d8 RCX: 000000000000007f
RDX: 00000000000003f3 RSI: 0000000000000004 RDI: ffffc9000117ff58
RBP: 0000000000000003 R08: 000000000000ffff R09: 0000000000000007
R10: 00007f66d4ca1720 R11: 000000000000022a R12: 0000000000000005
R13: 0000000000000000 R14: 00007f66d4ea4f50 R15: 0000000000000000
FS: 00007f66d4ea2700(0000) GS:ffff8804ffd00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffff81035f80 CR3: 0000000106f5e000 CR4: 0000000000000630
Stack:
ffffffff81435c08 0000000000000000 00007f66d4ea4f50 0000000000000000
0000000000000005 0000000000000003 00007f66d4ea49d8 000000000000022a
00007f66d4ca1720 0000000000000007 000000000000ffff 00007f66d448e2c8
Call Trace:
[<ffffffff81435c08>] ? page_fault+0x28/0x30
Code: 00 48 83 c4 30 5b 5d 41 5c 41 5d 41 5e 41 5f c3 31 d2 48 be ff ff ff ff
ff e8 ff ff 48 bf 00 00 00 00 00 c9 ff ff e9 57 e5 ff ff <55> 48 89 f5 53 48 89
fb 0f 20 d0 66 66 66 90 48 89 ee 48 89 df
RIP [<ffffffff81035fb8>] do_page_fault+0x0/0x1f
RSP <ffffc9000117ff50>
CR2: ffffffff81035f80
---[ end trace 3f6da64006abaee6 ]---
/sbin/gem5init: line 43: 1118 Killed chmod 755 /tmp/script
BUG: unable to handle kernel paging request at ffffffff81035f80
IP: [<ffffffff81035fb8>] do_page_fault+0x0/0x1f
PGD 180b067 PUD 180c063
PMD 10000e1
Oops: 0010 [#2] SMP
Modules linked in:
CPU: 1 PID: 1119 Comm: gem5init Tainted: G D 4.9.189 #1
Hardware name: , BIOS 06/08/2008
task: ffff880106f5e8c0 task.stack: ffffc9000117c000
RIP: 0010:[<ffffffff81035fb8>] [<ffffffff81035fb8>] do_page_fault+0x0/0x1f
RSP: 0000:ffffc9000117ff50 EFLAGS: 0000002e
RAX: 00007f66d4858220 RBX: 00007f66d4ea44f0 RCX: 0000000000000001
RDX: 000000000000001b RSI: 0000000000000004 RDI: ffffc9000117ff58
RBP: 0000000000000002 R08: 000000000000ffff R09: 0000000000000007
R10: 00007f66d4ca1720 R11: 000000000000022a R12: 0000000000000005
R13: 0000000000000000 R14: 00007f66d4ea4f50 R15: 0000000000000000
FS: 00007f66d4ea2700(0000) GS:ffff8804ffd00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffff81035f80 CR3: 0000000106f38000 CR4: 0000000000000630
Stack:
ffffffff81435c08 0000000000000000 00007f66d4ea4f50 0000000000000000
0000000000000005 0000000000000002 00007f66d4ea44f0 000000000000022a
00007f66d4ca1720 0000000000000007 000000000000ffff 00007f66d4858220
Call Trace:
[<ffffffff81435c08>] ? page_fault+0x28/0x30
Code: 00 48 83 c4 30 5b 5d 41 5c 41 5d 41 5e 41 5f c3 31 d2 48 be ff ff ff ff
ff e8 ff ff 48 bf 00 00 00 00 00 c9 ff ff e9 57 e5 ff ff <55> 48 89 f5 53 48 89
fb 0f 20 d0 66 66 66 90 48 89 ee 48 89 df
RIP [<ffffffff81035fb8>] do_page_fault+0x0/0x1f
RSP <ffffc9000117ff50>
CR2: ffffffff81035f80
---[ end trace 3f6da64006abaee7 ]---
/sbin/gem5init: line 51: 1119 Killed su root -c '/tmp/script'
BUG: unable to handle kernel paging request at ffffffff81035f80
IP: [<ffffffff81035fb8>] do_page_fault+0x0/0x1f
PGD 180b067 PUD 180c063
PMD 10000e1
Oops: 0010 [#3] SMP
Modules linked in:
CPU: 1 PID: 1043 Comm: gem5init Tainted: G D 4.9.189 #1
Hardware name: , BIOS 06/08/2008
task: ffff8804eecbc140 task.stack: ffffc90000f50000
RIP: 0010:[<ffffffff81035fb8>] [<ffffffff81035fb8>] do_page_fault+0x0/0x1f
RSP: 0000:ffffc90000f53f50 EFLAGS: 0000002e
RAX: 0000000000005555 RBX: 0000000000000001 RCX: 0000000000000002
RDX: 0000000000000010 RSI: 0000000000000007 RDI: ffffc90000f53f58
RBP: 0000000000000001 R08: 000000000000ffff R09: 0000000000000007
R10: 00007f66d4518c80 R11: 0000000000000000 R12: 00000000004be09d
R13: 0000000000000187 R14: 0000000000704250 R15: 0000000000000002
FS: 00007f66d4ea2700(0000) GS:ffff8804ffd00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffff81035f80 CR3: 00000004eeb48000 CR4: 0000000000000630
Stack:
ffffffff81435c08 0000000000000002 0000000000704250 0000000000000187
00000000004be09d 0000000000000001 0000000000000001 0000000000000000
00007f66d4518c80 0000000000000007 000000000000ffff 0000000000005555
Call Trace:
[<ffffffff81435c08>] ? page_fault+0x28/0x30
Code: 00 48 83 c4 30 5b 5d 41 5c 41 5d 41 5e 41 5f c3 31 d2 48 be ff ff ff ff
ff e8 ff ff 48 bf 00 00 00 00 00 c9 ff ff e9 57 e5 ff ff <55> 48 89 f5 53 48 89
fb 0f 20 d0 66 66 66 90 48 89 ee 48 89 df
RIP [<ffffffff81035fb8>] do_page_fault+0x0/0x1f
RSP <ffffc90000f53f50>
CR2: ffffffff81035f80
---[ end trace 3f6da64006abaee8 ]---
BUG: unable to handle kernel paging request at ffffffff81035f80
IP: [<ffffffff81035fb8>] do_page_fault+0x0/0x1f
PGD 180b067 PUD 180c063
PMD 10000e1
Oops: 0010 [#4] SMP
Modules linked in:
CPU: 1 PID: 1121 Comm: systemd-cgroups Tainted: G D 4.9.189 #1
Hardware name: , BIOS 06/08/2008
task: ffff8804ed412880 task.stack: ffffc90000f50000
RIP: 0010:[<ffffffff81035fb8>] [<ffffffff81035fb8>] do_page_fault+0x0/0x1f
RSP: 0000:ffffc90000f53f50 EFLAGS: 0000002c
RAX: 00007f5d137b4fc0 RBX: 00007f5d137bae88 RCX: 00007f5d13b5d000
RDX: 00007f5d13928b15 RSI: 0000000000000007 RDI: ffffc90000f53f58
RBP: 00007ffd6461d850 R08: 00007f5d137bb680 R09: 00007f5d137bb7b8
R10: 0000000000000022 R11: 00007f5d143cb000 R12: 00007f5d143cb000
R13: 00007f5d1379c000 R14: 00007f5d143cb000 R15: 0000000000000006
FS: 00007f5d143c8840(0000) GS:ffff8804ffd00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffff81035f80 CR3: 00000004ed4de000 CR4: 0000000000000630
Stack:
ffffffff81435c08 0000000000000006 00007f5d143cb000 00007f5d1379c000
00007f5d143cb000 00007ffd6461d850 00007f5d137bae88 00007f5d143cb000
0000000000000022 00007f5d137bb7b8 00007f5d137bb680 00007f5d137b4fc0
Call Trace:
[<ffffffff81435c08>] ? page_fault+0x28/0x30
Code: 00 48 83 c4 30 5b 5d 41 5c 41 5d 41 5e 41 5f c3 31 d2 48 be ff ff ff ff
ff e8 ff ff 48 bf 00 00 00 00 00 c9 ff ff e9 57 e5 ff ff <55> 48 89 f5 53 48 89
fb 0f 20 d0 66 66 66 90 48 89 ee 48 89 df
RIP [<ffffffff81035fb8>] do_page_fault+0x0/0x1f
RSP <ffffc90000f53f50>
CR2: ffffffff81035f80
---[ end trace 3f6da64006abaee9 ]---
BUG: unable to handle kernel paging request at ffffffff8102a880
IP: [<ffffffff8102a883>] smp_apic_timer_interrupt+0x0/0x95
PGD 180b067 PUD 180c063
PMD 10000e1
Oops: 0010 [#5] SMP
Modules linked in:
CPU: 0 PID: 1112 Comm: PR Tainted: G D 4.9.189 #1
Hardware name: , BIOS 06/08/2008
task: ffff8804eeaaea80 task.stack: ffffc90001184000
RIP: 0010:[<ffffffff8102a883>] [<ffffffff8102a883>]
smp_apic_timer_interrupt+0x0/0x95
RSP: 0000:ffff8804ffc03ff0 EFLAGS: 0000007e
RAX: 0000000000e0a84e RBX: 00007f1076dd2be4 RCX: 000000007c2284f8
RDX: 000000007c228500 RSI: 0000000000000001 RDI: ffffc90001187f58
RBP: 00007fff69a1c000 R08: 0000000000000000 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000400f30
R13: 00007fff69a1c0f0 R14: 0000000000000000 R15: 0000000000000000
FS: 00007f1086db4740(0000) GS:ffff8804ffc00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffff8102a880 CR3: 00000004ed798000 CR4: 0000000000000630
Stack:
ffffffff81434fce ffffc90001187f58 <EOI> 0000000000000000 0000000000000000
00007fff69a1c0f0 0000000000400f30 00007fff69a1c000 00007f1076dd2be4
0000000000000246 0000000000000000 000000000000000c 0000000000000000
Call Trace:
<IRQ> [<ffffffff81434fce>] ? apic_timer_interrupt+0x9e/0xb0
<EOI> Code:
00 00 e8 31 d9 40 00 4c 89 f7 57 9d 66 66 90 66 90 5b 41 5e c3 c3 31 d2 31 f6
48 c7 c7 8c a2 02 81 e9 b4 fc 05 00 e9 33 fa ff ff <55> 53 65 48 8b 2d 7b 3f fe
7e 65 48 89 3d 73 3f fe 7e e8 14 ac
RIP [<ffffffff8102a883>] smp_apic_timer_interrupt+0x0/0x95
RSP <ffff8804ffc03ff0>
CR2: ffffffff8102a880
---[ end trace 3f6da64006abaeea ]---
BUG: unable to handle kernel paging request at ffffffff81035f80
IP: [<ffffffff81035fb8>] do_page_fault+0x0/0x1f
PGD 180b067 PUD 180c063
PMD 10000e1
Oops: 0010 [#6] SMP
Modules linked in:
CPU: 0 PID: 1122 Comm: bash Tainted: G D 4.9.189 #1
Hardware name: , BIOS 06/08/2008
task: ffff8804ed412880 task.stack: ffffc90000f50000
RIP: 0010:[<ffffffff81035fb8>] [<ffffffff81035fb8>] do_page_fault+0x0/0x1f
RSP: 0000:ffffc90000f53f50 EFLAGS: 0000002e
RAX: 00007fcce9159220 RBX: 00007fcce97a54f0 RCX: 0000000000000001
RDX: 000000000000001b RSI: 0000000000000004 RDI: ffffc90000f53f58
RBP: 0000000000000002 R08: 000000000000ffff R09: 0000000000000007
R10: 00007fcce95a2720 R11: 000000000000022e R12: 0000000000000005
R13: 0000000000000000 R14: 00007fcce97a5f50 R15: 0000000000000000
FS: 00007fcce97a3700(0000) GS:ffff8804ffc00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffff81035f80 CR3: 00000003c1c66000 CR4: 0000000000000630
Stack:
ffffffff81435c08 0000000000000000 00007fcce97a5f50 0000000000000000
0000000000000005 0000000000000002 00007fcce97a54f0 000000000000022e
00007fcce95a2720 0000000000000007 000000000000ffff 00007fcce9159220
Call Trace:
[<ffffffff81435c08>] ? page_fault+0x28/0x30
Code: 00 48 83 c4 30 5b 5d 41 5c 41 5d 41 5e 41 5f c3 31 d2 48 be ff ff ff ff
ff e8 ff ff 48 bf 00 00 00 00 00 c9 ff ff e9 57 e5 ff ff <55> 48 89 f5 53 48 89
fb 0f 20 d0 66 66 66 90 48 89 ee 48 89 df
RIP [<ffffffff81035fb8>] do_page_fault+0x0/0x1f
RSP <ffffc90000f53f50>
CR2: ffffffff81035f80
---[ end trace 3f6da64006abaeeb ]---
Is there something wrong after switching cpu? Does the stats (especially for L3
cache) make sense? Is it because that I use 3 level classic cache? The reason
why I use kvm is to warm up the cache and then do a detailed research on L3
cache.
3. When I am going to make a checkpoint, I can't add m5 pseudo instructions to
my executable file because gem5 killed for illegal instructions. I aware that
the kvmCPU use host machine ISA. But I see others can do it. I wonder how you
guys make it.
Any suggestion is highly appreciated. Thanks,
Best regards,
Yifan Song
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