On Mon, Jul 23, 2007 at 01:05:00PM -0700, Roland McGrath wrote:
> > On Mon, Jul 23, 2007 at 12:12:15PM -0700, Roland McGrath wrote:
> > > > rm vmlinux*; time make vmlinux
> > > >
> > > > Vanilla tree: ~7,7 sec
> > > > With single shot ld (Roland's patch): 8,3 secs
> > >
> > > Shouldn't you compare:
> > > rm vmlinux*; find . -name built-in.o -print | xargs rm
> > > time make vmlinux
> > > or something like that?
> >
> > No. You are talking about the time of full build; there it would
> > be relevant. For incrementals it's definitely not so.
>
> Ah, I see what you are testing. Well, a fair test then is to do something
> that would actually happen, which is almost never just "rm vmlinux".
> i.e., at least one ld -r -o foo/built-in.o from changing one source file.
The normal case is one change somewhere => build kernel.
That can be tested by a simple
rm mm/memory.o; /usr/sbin/time make vmlinux
I will try that later.
For now I'm building an allyesconfig just to see if the build actually completes.
It is quite a number of .o files to link in one go and I fear ld will blow up
and make my machine go OOM.
processor : 0
vendor_id : AuthenticAMD
cpu family : 15
model : 75
model name : AMD Athlon(tm) 64 X2 Dual Core Processor 3800+
stepping : 2
cpu MHz : 2000.000
cache size : 512 KB
physical id : 0
siblings : 2
core id : 0
cpu cores : 2
fpu : yes
fpu_exception : yes
cpuid level : 1
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt rdtscp lm 3dnowext 3dnow pni cx16 lahf_lm cmp_legacy svm cr8_legacy
bogomips : 4011.99
TLB size : 1024 4K pages
clflush size : 64
cache_alignment : 64
address sizes : 40 bits physical, 48 bits virtual
power management: ts fid vid ttp tm stc
processor : 1
vendor_id : AuthenticAMD
cpu family : 15
model : 75
model name : AMD Athlon(tm) 64 X2 Dual Core Processor 3800+
stepping : 2
cpu MHz : 2000.000
cache size : 512 KB
physical id : 0
siblings : 2
core id : 1
cpu cores : 2
fpu : yes
fpu_exception : yes
cpuid level : 1
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt rdtscp lm 3dnowext 3dnow pni cx16 lahf_lm cmp_legacy svm cr8_legacy
bogomips : 4011.99
TLB size : 1024 4K pages
clflush size : 64
cache_alignment : 64
address sizes : 40 bits physical, 48 bits virtual
power management: ts fid vid ttp tm stc
meminfo:
MemTotal: 1027044 kB
MemFree: 83040 kB
Buffers: 4996 kB
Cached: 510208 kB
SwapCached: 0 kB
Active: 447092 kB
Inactive: 406620 kB
SwapTotal: 3004112 kB
SwapFree: 2965072 kB
Dirty: 107740 kB
Writeback: 0 kB
AnonPages: 338528 kB
Mapped: 62552 kB
Slab: 50684 kB
SReclaimable: 30132 kB
SUnreclaim: 20552 kB
PageTables: 13688 kB
NFS_Unstable: 0 kB
Bounce: 0 kB
CommitLimit: 3517632 kB
Committed_AS: 749456 kB
VmallocTotal: 34359738367 kB
VmallocUsed: 40636 kB
VmallocChunk: 34359695867 kB
Sam
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