FreeBSD v8.1 上 Linux 的
/proc/cpuinfo
相当于什么?我的应用程序读取 /proc/cpuinfo
并将信息保存在日志文件中,我该如何获取在 FreeBSD 上记录的类似信息?
样本
/proc/cpuinfo
看起来像这样:
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 23
model name : Intel(R) Xeon(R) CPU E5420 @ 2.50GHz
stepping : 8
cpu MHz : 2499.015
cache size : 6144 KB
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 10
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss nx lm constant_tsc pni ds_cpl
bogomips : 5004.54
processor : 1
vendor_id : GenuineIntel
cpu family : 6
model : 23
model name : Intel(R) Xeon(R) CPU E5420 @ 2.50GHz
stepping : 8
cpu MHz : 2499.015
cache size : 6144 KB
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 10
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss nx lm constant_tsc pni ds_cpl
bogomips : 5009.45
我不相信有什么东西能像 Linux 那样详细
/proc/cpuinfo
。查看 sysctl hw
和 /var/run/dmesg.boot
。大多数信息(例如 CPU 速度和指令集)应该在某处。
这就是我所看到的(删除了一些无趣的
hw.*
字段):
$ uname -sr
FreeBSD 4.10-RELEASE
$ grep -i cpu /var/run/dmesg.boot
CPU: Pentium III/Pentium III Xeon/Celeron (448.97-MHz 686-class CPU)
$ /sbin/sysctl hw
hw.machine: i386
hw.model: Pentium III/Pentium III Xeon/Celeron
hw.ncpu: 1
hw.byteorder: 1234
hw.physmem: 665989120
hw.usermem: 604614656
hw.pagesize: 4096
hw.floatingpoint: 1
hw.machine_arch: i386
hw.aac.iosize_max: 65536
hw.an.an_dump: off
hw.an.an_cache_mode: dbm
hw.an.an_cache_mcastonly: 0
hw.an.an_cache_iponly: 1
hw.fxp_rnr: 0
hw.fxp_noflow: 0
hw.dc_quick: 1
hw.ste.rxsyncs: 0
hw.instruction_sse: 0
hw.availpages: 162432
(请注意,在 OpenBSD 上,CPU 速度可在
hw.cpuspeed
中找到,而不是在 dmesg 中找到。)
使用
dmidecode
命令:
# dmidecode -t processor -t cache
# dmidecode 3.0
Scanning /dev/mem for entry point.
SMBIOS 2.4 present.
Handle 0x0004, DMI type 4, 35 bytes
Processor Information
Socket Designation: LGA 775
Type: Central Processor
Family: Pentium 4
Manufacturer: Intel
ID: F6 06 00 00 FF FB EB BF
Signature: Type 0, Family 6, Model 15, Stepping 6
Flags:
FPU (Floating-point unit on-chip)
VME (Virtual mode extension)
DE (Debugging extension)
PSE (Page size extension)
TSC (Time stamp counter)
MSR (Model specific registers)
PAE (Physical address extension)
MCE (Machine check exception)
CX8 (CMPXCHG8 instruction supported)
APIC (On-chip APIC hardware supported)
SEP (Fast system call)
MTRR (Memory type range registers)
PGE (Page global enable)
MCA (Machine check architecture)
CMOV (Conditional move instruction supported)
PAT (Page attribute table)
PSE-36 (36-bit page size extension)
CLFSH (CLFLUSH instruction supported)
DS (Debug store)
ACPI (ACPI supported)
MMX (MMX technology supported)
FXSR (FXSAVE and FXSTOR instructions supported)
SSE (Streaming SIMD extensions)
SSE2 (Streaming SIMD extensions 2)
SS (Self-snoop)
HTT (Multi-threading)
TM (Thermal monitor supported)
PBE (Pending break enabled)
Version: Intel(R) Core(TM)2 CPU 6600 @ 2.40GHz
Voltage: 1.4 V
External Clock: 266 MHz
Max Speed: 3800 MHz
Current Speed: 2394 MHz
Status: Populated, Enabled
Upgrade: Other
L1 Cache Handle: 0x0005
L2 Cache Handle: 0x0006
L3 Cache Handle: 0x0007
Serial Number: To Be Filled By O.E.M.
Asset Tag: To Be Filled By O.E.M.
Part Number: To Be Filled By O.E.M.
Handle 0x0005, DMI type 7, 19 bytes
Cache Information
Socket Designation: L1-Cache
Configuration: Enabled, Not Socketed, Level 1
Operational Mode: Write Back
Location: Internal
......
FreeBSD 11.2
sysctl hw.model
结果:
hw.model: Intel(R) Xeon(R) CPU E5620 @ 2.40GHz
仅添加到 jleedev 的注释中,您可以使用
sysctl(3)
系统调用从应用程序的内核中获取此信息。 查看 CTL_HW
顶级名称
如果你对CPU标志感兴趣,你也可以看看
dmesg -a | grep Features
或
grep Features /var/run/dmesg.boot
这会显示类似的内容
Features=0xfebfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,
PAT,PSE36,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS>
Features2=0x82982203<SSE3,PCLMULQDQ,SSSE3,CX16,SSE4.1,SSE4.2,POPCNT,
AESNI,<b31>>
AMD Features=0x28100000<NX,RDTSCP,LM>
AMD Features2=0x1<LAHF>
请注意,诸如 CPU 功能和各种 CPU 缓存大小之类的信息不在 sysctl 输出中,但它们可在 FreeBSD 下的 dmidecode 的输出中找到。
也许你可以使用
lscpu
,它是 Linux 中的 lscpu
实用程序到 FreeBSD 的端口。