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Message-ID: <50876e71-ade8-3c3b-db8b-8f5ae136157e@hispeed.ch>
Date:   Fri, 9 Dec 2016 21:50:43 +0100
From:   Roland Scheidegger <rscheidegger_lists@...peed.ch>
To:     Thomas Gleixner <tglx@...utronix.de>
Cc:     Ingo Molnar <mingo@...hat.com>, "H. Peter Anvin" <hpa@...or.com>,
        x86@...nel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] x86/tsc: RFC: re-synchronize TSCs to boot cpu TSC

Am 09.12.2016 um 18:33 schrieb Thomas Gleixner:
> On Fri, 9 Dec 2016, Roland Scheidegger wrote:
>> Am 09.12.2016 um 10:59 schrieb Thomas Gleixner:
>>> On Fri, 9 Dec 2016, Roland Scheidegger wrote:
>>>>
>>>> I saw some system lockups though:
>>>> When doing a cold boot, this kernel never managed to boot up. The last
>>>> message seen is:
>>>> x86: Booting SMP configuration:
>>>> .... node  #0, CPUs:        #1
>>>
>>> Weird. That really would be interesting to figure out what goes wrong
>>> there. What bothers me is that we don't see something like this:
>>>
>>>> [    0.172334] TSC ADJUST differs: Reference CPU0: -577421768610 CPU1:
>>>> -577423766270
>>>
>>> Can you please apply the debug patch below and provide the output ?
>> Ok, this is the output (minus some typos maybe...):
>>
>> x86: Booting SMP configuration:
>> .... node #0, CPUs:     #1
>> TSC ADJUST: CPU1: -2806491604
>> TSC source sync 0 -> 1 runs 3
>> TSC ADJUST differs: Reference CPU0: -2805503200 CPU1: -2806491604
>> TSC ADJUST synchronize: Reference CPU0: -2805503200 CPU1: -2806491604
>> TSC target sync skip
>> TSC source sync skipped
>>
>> And that's it.
> 
> That's a cold boot (power on), right?
> 
> That looks like I expected. As we know that the CPUs are in the same
> package simply resynchronizing the TSC ADJUST MSR is enough. And the sync
> test is skipped as we have resynced TSC ADJUST already to be the same
> value.
> 
> What's unexpected is that the thing stops working :(
> 
> I'm pretty sure the boot cpu hangs in that endless loop waiting for CPU1 to
> set the online bit, but for whatever reason this does not happen.
> 
> Can you add the patch below to gather more information? There is a hunk in
> there with an '#if 0' which sets the TSC ADJUST to 0 on boot, which you can
> turn on as second step.

Ok, here's the results:

...
TSC ADJUST synchronize: Reference CPU0: -2820267100 CPU1: -2822498296
TSC target sync skipped
smpboot: Vector locked
smpboot: Vector setup done
smpboot: Clock setup
TSC source sync skipped
smpboot: Target CPU is online


With the #if 0 block activated, it boots up fine, the output was:

[    1.038892] x86: Booting SMP configuration:
[    1.038930] .... node  #0, CPUs:        #1
[    0.171851] TSC ADJUST: CPU1: -2830353064 218577682002
[    1.117495] TSC source sync 0 -> 1 runs 3
[    0.171852] TSC ADJUST differs: Reference CPU0: -2828600940 CPU1:
-2830353064
[    0.171853] TSC ADJUST synchronize: Reference CPU0: 0 CPU1: -2830353064
[    1.117497] TSC target sync skip
[    1.117497] smpboot: Vector locked
[    1.117506] smpboot: Vector setup done
[    1.117508] smpboot: Clock setup
[    1.117510] smpboot: Enter idle startup
[    1.117860] TSC source sync skipped
[    1.117896] smpboot: Target CPU is online
[    1.117990]   #2
[    0.252336] TSC ADJUST: CPU2: -2828948550 218818578394
[    1.197511] TSC source sync 0 -> 2 runs 3
[    0.252337] TSC ADJUST differs: Reference CPU0: -2828600940 CPU2:
-2828948550
[    0.252338] TSC ADJUST synchronize: Reference CPU0: 0 CPU2: -2828948550
[    1.197513] TSC target sync skip
[    1.197513] smpboot: Vector locked
[    1.197523] smpboot: Vector setup done
[    1.197524] smpboot: Clock setup
[    1.197527] smpboot: Enter idle startup
[    1.197866] TSC source sync skipped
[    1.197902] smpboot: Target CPU is online
[    1.197997]   #3
[    0.332199] TSC ADJUST: CPU3: -2829409422 219057612986
[    1.277528] TSC source sync 0 -> 3 runs 3
[    0.332201] TSC ADJUST differs: Reference CPU0: -2828600940 CPU3:
-2829409422
[    0.332202] TSC ADJUST synchronize: Reference CPU0: 0 CPU3: -2829409422
[    1.277530] TSC target sync skip
[    1.277530] smpboot: Vector locked
[    1.277540] smpboot: Vector setup done
[    1.277542] smpboot: Clock setup
[    1.277544] smpboot: Enter idle startup
[    1.277884] TSC source sync skipped
[    1.277920] smpboot: Target CPU is online
[    1.278016]   #4
[    0.411955] TSC ADJUST: CPU4: -2830194520 219296322250
[    1.357546] TSC source sync 0 -> 4 runs 3
[    0.411956] TSC ADJUST differs: Reference CPU0: -2828600940 CPU4:
-2830194520
[    0.411957] TSC ADJUST synchronize: Reference CPU0: 0 CPU4: -2830194520
[    1.357548] TSC target sync skip
[    1.357548] smpboot: Vector locked
[    1.357558] smpboot: Vector setup done
[    1.357560] smpboot: Clock setup
[    1.357562] smpboot: Enter idle startup
[    1.357901] TSC source sync skipped
[    1.357937] smpboot: Target CPU is online
[    1.358030]   #5
[    0.491957] TSC ADJUST: CPU5: -2830235658 219535775620
[    1.437562] TSC source sync 0 -> 5 runs 3
[    0.491959] TSC ADJUST differs: Reference CPU0: -2828600940 CPU5:
-2830235658
[    0.491960] TSC ADJUST synchronize: Reference CPU0: 0 CPU5: -2830235658
[    1.437564] TSC target sync skip
[    1.437565] smpboot: Vector locked
[    1.437574] smpboot: Vector setup done
[    1.437575] smpboot: Clock setup
[    1.437578] smpboot: Enter idle startup
[    1.437917] TSC source sync skipped
[    1.437953] smpboot: Target CPU is online
[    1.438047]   #6
[    0.571943] TSC ADJUST: CPU6: -2830332712 219775177676
[    1.517581] TSC source sync 0 -> 6 runs 3
[    0.571945] TSC ADJUST differs: Reference CPU0: -2828600940 CPU6:
-2830332712
[    0.571946] TSC ADJUST synchronize: Reference CPU0: 0 CPU6: -2830332712
[    1.517583] TSC target sync skip
[    1.517583] smpboot: Vector locked
[    1.517592] smpboot: Vector setup done
[    1.517594] smpboot: Clock setup
[    1.517597] smpboot: Enter idle startup
[    1.517935] TSC source sync skipped
[    1.517971] smpboot: Target CPU is online
[    1.518066]   #7
[    0.652035] TSC ADJUST: CPU7: -2830107566 220014895498
[    1.597597] TSC source sync 0 -> 7 runs 3
[    0.652037] TSC ADJUST differs: Reference CPU0: -2828600940 CPU7:
-2830107566
[    0.652037] TSC ADJUST synchronize: Reference CPU0: 0 CPU7: -2830107566
[    1.597599] TSC target sync skip
[    1.597600] smpboot: Vector locked
[    1.597609] smpboot: Vector setup done
[    1.597610] smpboot: Clock setup
[    1.597613] smpboot: Enter idle startup
[    1.597952] TSC source sync skipped
[    1.597988] smpboot: Target CPU is online
[    1.598083]   #8
[    0.732530] TSC ADJUST: CPU8: -2828717392 220255817924
[    1.677628] TSC source sync 0 -> 8 runs 3
[    0.732532] TSC ADJUST differs: Reference CPU0: -2828600940 CPU8:
-2828717392
[    0.732532] TSC ADJUST synchronize: Reference CPU0: 0 CPU8: -2828717392
[    1.677630] TSC target sync skip
[    1.677630] smpboot: Vector locked
[    1.677643] smpboot: Vector setup done
[    1.677644] smpboot: Clock setup
[    1.677647] smpboot: Enter idle startup
[    1.677984] TSC source sync skipped
[    1.678020] smpboot: Target CPU is online
[    1.678123]   #9
[    0.812034] TSC ADJUST: CPU9: -2830240300 220493781182
[    1.757641] TSC source sync 0 -> 9 runs 3
[    0.812036] TSC ADJUST differs: Reference CPU0: -2828600940 CPU9:
-2830240300
[    0.812036] TSC ADJUST synchronize: Reference CPU0: 0 CPU9: -2830240300
[    1.757642] TSC target sync skip
[    1.757643] smpboot: Vector locked
[    1.757652] smpboot: Vector setup done
[    1.757654] smpboot: Clock setup
[    1.757656] smpboot: Enter idle startup
[    1.757996] TSC source sync skipped
[    1.758032] smpboot: Target CPU is online
[    1.758130]  #10
[    0.892439] TSC ADJUST: CPU10: -2829079162 220734436186
[    1.837658] TSC source sync 0 -> 10 runs 3
[    0.892441] TSC ADJUST differs: Reference CPU0: -2828600940 CPU10:
-2829079162
[    0.892441] TSC ADJUST synchronize: Reference CPU0: 0 CPU10: -2829079162
[    1.837659] TSC target sync skip
[    1.837660] smpboot: Vector locked
[    1.837669] smpboot: Vector setup done
[    1.837671] smpboot: Clock setup
[    1.837673] smpboot: Enter idle startup
[    1.838023] TSC source sync skipped
[    1.838059] smpboot: Target CPU is online
[    1.838155]  #11
[    0.972104] TSC ADJUST: CPU11: -2830133522 220972875474
[    1.917674] TSC source sync 0 -> 11 runs 3
[    0.972105] TSC ADJUST differs: Reference CPU0: -2828600940 CPU11:
-2830133522
[    0.972106] TSC ADJUST synchronize: Reference CPU0: 0 CPU11: -2830133522
[    1.917676] TSC target sync skip
[    1.917677] smpboot: Vector locked
[    1.917685] smpboot: Vector setup done
[    1.917686] smpboot: Clock setup
[    1.917689] smpboot: Enter idle startup
[    1.918039] TSC source sync skipped
[    1.918075] smpboot: Target CPU is online
[    1.918171]  #12
[    1.052297] TSC ADJUST: CPU12: -2829606124 221212897186
[    1.997691] TSC source sync 0 -> 12 runs 3
[    1.052298] TSC ADJUST differs: Reference CPU0: -2828600940 CPU12:
-2829606124
[    1.052299] TSC ADJUST synchronize: Reference CPU0: 0 CPU12: -2829606124
[    1.997693] TSC target sync skip
[    1.997693] smpboot: Vector locked
[    1.997702] smpboot: Vector setup done
[    1.997704] smpboot: Clock setup
[    1.997706] smpboot: Enter idle startup
[    1.998057] TSC source sync skipped
[    1.998093] smpboot: Target CPU is online
[    1.998189]  #13
[    1.132267] TSC ADJUST: CPU13: -2829742434 221452252884
[    2.077708] TSC source sync 0 -> 13 runs 3
[    1.132269] TSC ADJUST differs: Reference CPU0: -2828600940 CPU13:
-2829742434
[    1.132270] TSC ADJUST synchronize: Reference CPU0: 0 CPU13: -2829742434
[    2.077709] TSC target sync skip
[    2.077710] smpboot: Vector locked
[    2.077719] smpboot: Vector setup done
[    2.077720] smpboot: Clock setup
[    2.077722] smpboot: Enter idle startup
[    2.078073] TSC source sync skipped
[    2.078109] smpboot: Target CPU is online
[    2.078203]  #14
[    1.212227] TSC ADJUST: CPU14: -2829914872 221691574212
[    2.157724] TSC source sync 0 -> 14 runs 3
[    1.212228] TSC ADJUST differs: Reference CPU0: -2828600940 CPU14:
-2829914872
[    1.212229] TSC ADJUST synchronize: Reference CPU0: 0 CPU14: -2829914872
[    2.157726] TSC target sync skip
[    2.157726] smpboot: Vector locked
[    2.157735] smpboot: Vector setup done
[    2.157737] smpboot: Clock setup
[    2.157740] smpboot: Enter idle startup
[    2.159900] TSC source sync skipped
[    2.159936] smpboot: Target CPU is online
[    2.160032]  #15
[    1.292113] TSC ADJUST: CPU15: -2830310478 221930677086
[    2.237743] TSC source sync 0 -> 15 runs 3
[    1.292115] TSC ADJUST differs: Reference CPU0: -2828600940 CPU15:
-2830310478
[    1.292115] TSC ADJUST synchronize: Reference CPU0: 0 CPU15: -2830310478
[    2.237745] TSC target sync skip
[    2.237745] smpboot: Vector locked
[    2.237755] smpboot: Vector setup done
[    2.237756] smpboot: Clock setup
[    2.237759] smpboot: Enter idle startup
[    2.238112] TSC source sync skipped
[    2.238148] smpboot: Target CPU is online
[    2.238186] x86: Booted up 1 node, 16 CPUs
[    2.238224] smpboot: Total of 16 processors activated (95793.84 BogoMIPS)

(And fwiw with my quick hack the lockups disappear to when I change that
back to blast a zero into TSC_ADJ for all cpus.)


The system also came back up fine from suspend with this (well - still
minus graphics...), however disabled tsc clocksource:

[  579.931739] Enabling non-boot CPUs ...
[  579.943106] x86: Booting SMP configuration:
[  579.943107] smpboot: Booting Node 0 Processor 1 APIC 0x2
[  579.943189] TSC ADJUST: CPU1: -1504429974 21601834126
[  579.943837] TSC source sync 0 -> 1 runs 3
[  579.943191] TSC ADJUST differs: Reference CPU0: -2828600940 CPU1:
-1504429974
[  579.943191] TSC ADJUST synchronize: Reference CPU0: 0 CPU1: -1504429974
[  580.445833] TSC target sync skip
[  580.445834] smpboot: Vector locked
[  579.943839] TSC source sync skipped
[  580.445845] smpboot: Vector setup done
[  579.943850] smpboot: Target CPU is online
[  580.445847] smpboot: Clock setup
[  580.445852] smpboot: Enter idle startup
[  580.445914]  cache: parent cpu1 should not be sleeping
[  579.944093] CPU1 is up
[  580.458983] clocksource: timekeeping watchdog on CPU1: Marking
clocksource 'tsc' as unstable because the skew is too large:
[  580.458985] clocksource:                       'hpet' wd_now: 587c1
wd_last: 437c7 mask: ffffffff
[  580.458986] clocksource:                       'tsc' cs_now:
563963cd8 cs_last: 508f5a02a mask: ffffffffffffffff
[  579.959249] smpboot: Booting Node 0 Processor 2 APIC 0x4
[  579.959454] TSC ADJUST: CPU2: -1504299836 21650515856
[  579.960058] TSC source sync 0 -> 2 runs 3
[  579.959456] TSC ADJUST differs: Reference CPU0: -2828600940 CPU2:
-1504299836
[  579.959456] TSC ADJUST synchronize: Reference CPU0: 0 CPU2: -1504299836
[  580.462055] TSC target sync skip
[  579.960060] TSC source sync skipped
[  580.462056] smpboot: Vector locked
[  580.462067] smpboot: Vector setup done
[  579.960072] smpboot: Target CPU is online
[  580.462068] smpboot: Clock setup
[  580.462071] smpboot: Enter idle startup
[  580.462136]  cache: parent cpu2 should not be sleeping
[  579.960327] CPU2 is up
[  580.503230] smpboot: Booting Node 0 Processor 3 APIC 0x6
[  580.503782] TSC ADJUST: CPU3: -1504357188 23279711288
[  580.504405] TSC source sync 0 -> 3 runs 3
[  580.503784] TSC ADJUST differs: Reference CPU0: -2828600940 CPU3:
-1504357188
[  580.503784] TSC ADJUST synchronize: Reference CPU0: 0 CPU3: -1504357188
[  581.006402] TSC target sync skip
[  581.006403] smpboot: Vector locked
[  580.504408] TSC source sync skipped
[  581.006416] smpboot: Vector setup done
[  580.504421] smpboot: Target CPU is online
[  581.006418] smpboot: Clock setup
[  581.006424] smpboot: Enter idle startup
[  581.006506]  cache: parent cpu3 should not be sleeping
[  580.504741] CPU3 is up
[  581.006760] [Firmware Bug]: TSC ADJUST differs: CPU0 0 -->
-1502494750. Restoring
[  581.019271] smpboot: Booting Node 0 Processor 4 APIC 0x8
[  580.517802] TSC ADJUST: CPU4: -1504419274 23321675136
[  581.020442] TSC source sync 0 -> 4 runs 3
[  580.517804] TSC ADJUST differs: Reference CPU0: -2828600940 CPU4:
-1504419274
[  580.517805] TSC ADJUST synchronize: Reference CPU0: 0 CPU4: -1504419274
[  581.020444] TSC target sync skip
[  581.020444] TSC source sync skipped
[  581.020445] smpboot: Vector locked
[  581.020459] smpboot: Vector setup done
[  581.020459] smpboot: Target CPU is online
[  581.020461] smpboot: Clock setup
[  581.020465] smpboot: Enter idle startup
[  581.020548]  cache: parent cpu4 should not be sleeping
[  581.020785] CPU4 is up
[  581.035383] smpboot: Booting Node 0 Processor 5 APIC 0xa
[  580.534095] TSC ADJUST: CPU5: -1503892568 23370438110
[  581.036558] TSC source sync 0 -> 5 runs 3
[  580.534096] TSC ADJUST differs: Reference CPU0: -2828600940 CPU5:
-1503892568
[  580.534097] TSC ADJUST synchronize: Reference CPU0: 0 CPU5: -1503892568
[  581.036560] TSC target sync skip
[  581.036560] TSC source sync skipped
[  581.036561] smpboot: Vector locked
[  581.036574] smpboot: Vector setup done
[  581.036575] smpboot: Target CPU is online
[  581.036576] smpboot: Clock setup
[  581.036580] smpboot: Enter idle startup
[  581.036664]  cache: parent cpu5 should not be sleeping
[  581.036913] CPU5 is up
[  581.051460] smpboot: Booting Node 0 Processor 6 APIC 0xc
[  580.550097] TSC ADJUST: CPU6: -1504107826 23418332356
[  581.052632] TSC source sync 0 -> 6 runs 3
[  580.550098] TSC ADJUST differs: Reference CPU0: -2828600940 CPU6:
-1504107826
[  580.550099] TSC ADJUST synchronize: Reference CPU0: 0 CPU6: -1504107826
[  581.052634] TSC target sync skip
[  581.052634] smpboot: Vector locked
[  581.052634] TSC source sync skipped
[  581.052647] smpboot: Vector setup done
[  581.052648] smpboot: Target CPU is online
[  581.052650] smpboot: Clock setup
[  581.052654] smpboot: Enter idle startup
[  581.052738]  cache: parent cpu6 should not be sleeping
[  581.053002] CPU6 is up
[  581.071544] smpboot: Booting Node 0 Processor 7 APIC 0xe
[  580.570040] TSC ADJUST: CPU7: -1504535440 23478024002
[  581.072718] TSC source sync 1 -> 7 runs 3
[  580.570041] TSC ADJUST differs: Reference CPU0: -2828600940 CPU7:
-1504535440
[  580.570042] TSC ADJUST synchronize: Reference CPU0: 0 CPU7: -1504535440
[  581.072720] TSC target sync skip
[  581.072720] smpboot: Vector locked
[  581.072720] TSC source sync skipped
[  581.072733] smpboot: Vector setup done
[  581.072734] smpboot: Target CPU is online
[  581.072736] smpboot: Clock setup
[  581.072740] smpboot: Enter idle startup
[  581.072822]  cache: parent cpu7 should not be sleeping
[  581.073092] CPU7 is up
[  581.095281] smpboot: Booting Node 0 Processor 8 APIC 0x1
[  580.594433] TSC ADJUST: CPU8: -1502571034 23551035204
[  581.096455] TSC source sync 1 -> 8 runs 3
[  580.594435] TSC ADJUST differs: Reference CPU0: -2828600940 CPU8:
-1502571034
[  580.594436] TSC ADJUST synchronize: Reference CPU0: 0 CPU8: -1502571034
[  581.096457] TSC target sync skip
[  581.096457] smpboot: Vector locked
[  581.096458] TSC source sync skipped
[  581.096470] smpboot: Vector setup done
[  581.096470] smpboot: Target CPU is online
[  581.096472] smpboot: Clock setup
[  581.096476] smpboot: Enter idle startup
[  581.096593]  cache: parent cpu8 should not be sleeping
[  581.096881] CPU8 is up
[  581.111327] smpboot: Booting Node 0 Processor 9 APIC 0x3
[  580.609809] TSC ADJUST: CPU9: -1504556458 23597051168
[  581.112494] TSC source sync 1 -> 9 runs 3
[  580.609810] TSC ADJUST differs: Reference CPU0: -2828600940 CPU9:
-1504556458
[  580.609811] TSC ADJUST synchronize: Reference CPU0: 0 CPU9: -1504556458
[  581.112496] TSC target sync skip
[  581.112496] TSC source sync skipped
[  581.112496] smpboot: Vector locked
[  581.112515] smpboot: Vector setup done
[  581.112515] smpboot: Target CPU is online
[  581.112518] smpboot: Clock setup
[  581.112522] smpboot: Enter idle startup
[  581.112635]  cache: parent cpu9 should not be sleeping
[  581.112919] CPU9 is up
[  581.127367] smpboot: Booting Node 0 Processor 10 APIC 0x5
[  580.626298] TSC ADJUST: CPU10: -1503281384 23646406682
[  581.128558] TSC source sync 1 -> 10 runs 3
[  580.626300] TSC ADJUST differs: Reference CPU0: -2828600940 CPU10:
-1503281384
[  580.626301] TSC ADJUST synchronize: Reference CPU0: 0 CPU10: -1503281384
[  581.128559] TSC target sync skip
[  581.128560] TSC source sync skipped
[  581.128560] smpboot: Vector locked
[  581.128573] smpboot: Vector setup done
[  581.128573] smpboot: Target CPU is online
[  581.128575] smpboot: Clock setup
[  581.128579] smpboot: Enter idle startup
[  581.128689]  cache: parent cpu10 should not be sleeping
[  581.128997] CPU10 is up
[  581.143754] smpboot: Booting Node 0 Processor 11 APIC 0x7
[  580.642580] TSC ADJUST: CPU11: -1503566952 23695138352
[  581.144935] TSC source sync 1 -> 11 runs 3
[  580.642582] TSC ADJUST differs: Reference CPU0: -2828600940 CPU11:
-1503566952
[  580.642583] TSC ADJUST synchronize: Reference CPU0: 0 CPU11: -1503566952
[  581.144937] TSC target sync skip
[  581.144937] smpboot: Vector locked
[  581.144938] TSC source sync skipped
[  581.144950] smpboot: Vector setup done
[  581.144950] smpboot: Target CPU is online
[  581.144952] smpboot: Clock setup
[  581.144956] smpboot: Enter idle startup
[  581.145069]  cache: parent cpu11 should not be sleeping
[  581.145493] CPU11 is up
[  581.163769] smpboot: Booting Node 0 Processor 12 APIC 0x9
[  580.662529] TSC ADJUST: CPU12: -1503752538 23754846788
[  581.164945] TSC source sync 1 -> 12 runs 3
[  580.662531] TSC ADJUST differs: Reference CPU0: -2828600940 CPU12:
-1503752538
[  580.662531] TSC ADJUST synchronize: Reference CPU0: 0 CPU12: -1503752538
[  581.164947] TSC target sync skip
[  581.164948] TSC source sync skipped
[  581.164949] smpboot: Vector locked
[  581.164961] smpboot: Vector setup done
[  581.164962] smpboot: Target CPU is online
[  581.164963] smpboot: Clock setup
[  581.164967] smpboot: Enter idle startup
[  581.165084]  cache: parent cpu12 should not be sleeping
[  581.165564] CPU12 is up
[  581.191866] smpboot: Booting Node 0 Processor 13 APIC 0xb
[  580.690388] TSC ADJUST: CPU13: -1504470824 23838230778
[  581.193045] TSC source sync 1 -> 13 runs 3
[  580.690390] TSC ADJUST differs: Reference CPU0: -2828600940 CPU13:
-1504470824
[  580.690391] TSC ADJUST synchronize: Reference CPU0: 0 CPU13: -1504470824
[  581.193047] TSC target sync skip
[  581.193047] smpboot: Vector locked
[  581.193048] TSC source sync skipped
[  581.193060] smpboot: Vector setup done
[  581.193061] smpboot: Target CPU is online
[  581.193063] smpboot: Clock setup
[  581.193066] smpboot: Enter idle startup
[  581.193184]  cache: parent cpu13 should not be sleeping
[  581.193637] CPU13 is up
[  581.215919] smpboot: Booting Node 0 Processor 14 APIC 0xd
[  580.714423] TSC ADJUST: CPU14: -1504515582 23910167978
[  581.217095] TSC source sync 1 -> 14 runs 3
[  580.714425] TSC ADJUST differs: Reference CPU0: -2828600940 CPU14:
-1504515582
[  580.714426] TSC ADJUST synchronize: Reference CPU0: 0 CPU14: -1504515582
[  581.217097] TSC target sync skip
[  581.217097] smpboot: Vector locked
[  581.217098] TSC source sync skipped
[  581.217110] smpboot: Vector setup done
[  581.217111] smpboot: Target CPU is online
[  581.217113] smpboot: Clock setup
[  581.217116] smpboot: Enter idle startup
[  581.217234]  cache: parent cpu14 should not be sleeping
[  581.217706] CPU14 is up
[  581.251975] smpboot: Booting Node 0 Processor 15 APIC 0xf
[  580.750545] TSC ADJUST: CPU15: -1504326376 24018283718
[  581.253154] TSC source sync 1 -> 15 runs 3
[  580.750547] TSC ADJUST differs: Reference CPU0: -2828600940 CPU15:
-1504326376
[  580.750548] TSC ADJUST synchronize: Reference CPU0: 0 CPU15: -1504326376
[  581.253156] TSC target sync skip
[  581.253156] TSC source sync skipped
[  581.253157] smpboot: Vector locked
[  581.253169] smpboot: Vector setup done
[  581.253169] smpboot: Target CPU is online
[  581.253171] smpboot: Clock setup
[  581.253175] smpboot: Enter idle startup
[  581.253294]  cache: parent cpu15 should not be sleeping
[  581.253774] CPU15 is up
[  581.308954] ACPI: Waking up from system sleep state S3
[  581.308984] clocksource: Switched to clocksource hpet



> 
> This BIOS seems to be rather strange ...
Don't tell me...

No idea what it's doing, but I think it's safe to say whatever it's
trying to do, it's doing it wrong...

Roland


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