linux-kernel - Re: [PATCH] x86_64: Limit the number of processor bootup messages

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Date:	Tue, 03 Nov 2009 16:22:48 -0800
From:	Mike Travis <travis@....com>
To:	Ingo Molnar <mingo@...e.hu>
CC:	Andi Kleen <ak@...ux.intel.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Heiko Carstens <heiko.carstens@...ibm.com>,
	Roland Dreier <rdreier@...co.com>,
	Randy Dunlap <rdunlap@...otime.net>, Tejun Heo <tj@...nel.org>,
	Greg Kroah-Hartman <gregkh@...e.de>,
	Yinghai Lu <yinghai@...nel.org>,
	"H. Peter Anvin" <hpa@...or.com>,
	David Rientjes <rientjes@...gle.com>,
	Steven Rostedt <rostedt@...dmis.org>,
	Rusty Russell <rusty@...tcorp.com.au>,
	Hidetoshi Seto <seto.hidetoshi@...fujitsu.com>,
	Jack Steiner <steiner@....com>,
	Frederic Weisbecker <fweisbec@...il.com>, x86@...nel.org,
	Linux Kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] x86_64: Limit the number of processor bootup messages


...
>> So please go with the simple solution i suggested days ago: print 
>> stuff on the boot CPU but after that only a single line per AP CPU.
>>
>>     Ingo
> 

Hi Ingo,

Here is some timing info I collected...  Would you accept the first
format (line per node) as a compromise?

(Note there will be 256 node systems w/4096 threads as well as
512 node systems w/HT disabled thus still 4096 threads.)

Btw, I think we should keep the processor summary as it does show some
useful information.  Agreed?  

(... I'll clean up the BogoMIPS line a bit:

	BogoMIPS(lpj):  MIN xxx (yyy)   AVG xxx (yyy)   MAX xxx (yyy)
...)

Thanks,
Mike

64 Nodes/512 cores/1024 threads...

By Node:
  1 [   27.998414] Booting Node   0, Processors 1-7,512-519
  2 [   28.645066] Booting Node   1, Processors 8-15,520-527
  3 [   29.389359] Booting Node   2, Processors 16-23,528-535
  4 [   30.160646] Booting Node   3, Processors 24-31,536-543
...
 62 [   75.013459] Booting Node  61, Processors 488-495,1000-1007
 63 [   75.789663] Booting Node  62, Processors 496-503,1008-1015
 64 [   76.565430] Booting Node  63, Processors 504-511,1016-1023
 65 [  126.860204] Brought up 1024 CPUs
 66 [  126.865392] Summary Processor Information for CPUS: 0-143,256-383,448-655,768-895,960-1023
 67 [  126.876033] Genuine Intel(R) CPU             0000 @ 2.13GHz stepping 04
 68 [  126.881404] BogoMIPS: MIN 3980.53 MAX 4268.28 AVG 4265.85
 69 [  126.888032] Loops/Jiffy: MIN 7961074 MAX 8536570 AVG 8531701
 70 [  126.896875] Summary Processor Information for CPUS: 144-239,384-447,656-751,896-959
 71 [  126.904032] Intel(R) Xeon(R) CPU           X7560  @ 2.27GHz stepping 05
 72 [  126.913404] BogoMIPS: MIN 4528.51 MAX 4762.75 AVG 4535.89
 73 [  126.920032] Loops/Jiffy: MIN 9057030 MAX 9525505 AVG 9071785
 74 [  126.924217] Summary Processor Information for CPUS: 240-255,752-767
 75 [  126.932032] Genuine Intel(R) CPU             0000 @ 2.13GHz stepping 03
 76 [  126.937404] BogoMIPS: MIN 4267.31 MAX 4268.24 AVG 4267.66
 77 [  126.944032] Loops/Jiffy: MIN 8534632 MAX 8536490 AVG 8535338
 78 [  126.952425] Total of 1024 processors activated (4454702.72 BogoMIPS).

By CPU:
   1 [   28.010255] Booting Processor 1 APIC 0x2 ip 0x6000
   2 [   28.106191] Booting Processor 2 APIC 0x4 ip 0x6000
   3 [   28.204705] Booting Processor 3 APIC 0x6 ip 0x6000
   4 [   28.300709] Booting Processor 4 APIC 0x10 ip 0x6000
   5 [   28.400707] Booting Processor 5 APIC 0x12 ip 0x6000
...
1020 [  131.440341] Booting Processor 1020 APIC 0x7f1 ip 0x6000
1021 [  131.544366] Booting Processor 1021 APIC 0x7f3 ip 0x6000
1022 [  131.648354] Booting Processor 1022 APIC 0x7f5 ip 0x6000
1023 [  131.752350] Booting Processor 1023 APIC 0x7f7 ip 0x6000
1024 [  131.852202] Brought up 1024 CPUs
1025 [  131.857394] Summary Processor Information for CPUS: 0-143,256-383,448-655,768-895,960-1023
1026 [  131.868033] Genuine Intel(R) CPU             0000 @ 2.13GHz stepping 04
1027 [  131.873404] BogoMIPS: MIN 3996.11 MAX 4555.27 AVG 4266.18
1028 [  131.880033] Loops/Jiffy: MIN 7992230 MAX 9110559 AVG 8532371
1029 [  131.888871] Summary Processor Information for CPUS: 144-239,384-447,656-751,896-959
1030 [  131.896032] Intel(R) Xeon(R) CPU           X7560  @ 2.27GHz stepping 05
1031 [  131.905405] BogoMIPS: MIN 4252.28 MAX 4819.44 AVG 4535.46
1032 [  131.912032] Loops/Jiffy: MIN 8504574 MAX 9638886 AVG 9070920
1033 [  131.916218] Summary Processor Information for CPUS: 240-255,752-767
1034 [  131.924032] Genuine Intel(R) CPU             0000 @ 2.13GHz stepping 03
1035 [  131.929404] BogoMIPS: MIN 4267.15 MAX 4268.35 AVG 4267.67
1036 [  131.936032] Loops/Jiffy: MIN 8534307 MAX 8536711 AVG 8535357
1037 [  131.944424] Total of 1024 processors activated (4454789.68 BogoMIPS).


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