Dotaz: xen omezeni vyuziti cpu pro hosty

[Kroko]

Zdravím,

všude nacházím jak omezit paměť apod. ale nikde nevydím jak omezit spotřebu CPU v xenu pro hosta např. na 30% výkonu CPU fyzického stroje.

Díky za radu.

Odpovědi

[ZAH]

Jde omezit počet procesů (jader)

vcpus = 1

[Kroko]

to vim a to je naprosto k nicemu

[Kroko]

vypada to ze to jde az v 3.3.3 verzi v 3.0.3 co pouzivam na debianu to jde jen jednorazove, asi se budu muset spokojit s tim omezenim na jedno jadro, ikdyz nevim jak to na 2jadrovym cpu rozdelim mezi 4 virtualy :(

[baloo]

U vasi verze by mela fungovat klasika http://wiki.xensource.com/xenwiki/CreditScheduler

[Kroko]

viz muj prispevek vyse, ze to jde omezit jednorazove, problem je ale jak to nastavit do konfiguracniho souboru hosta, protoze jednorazove si to bude pamatovat jen do nejblizsiho restartu hosta

[baloo]

V bordel xenu dokumentaci sou parametry cpu_weight cpu_cap, takze ja bych to videl spoustet se scriptem "xm create /xen/win.vm.cf cpu_weight=512 cpu_cap=50" , mozna by moch fungovat zapis primo do configu.

[Kroko]

tak tohle vyzkouším, já tam zkoušel rvát do konfigu jen to cap

[Kroko]

ee, tak to nefunguje, bohuzel :(

[baloo]

Ale funguje :) Jedna masinka bez a druha s parametrem cpu_weight cpu_cap

xm sched-credit
Name                                ID Weight  Cap
Domain-0                             0    256    0
cent52                               1    256    0
cs52                                 5    512   50

Konfig vps

kernel     = '/boot/xen-vmlinuz'
ramdisk    = '/boot/xen-initrd.img'
memory     = 512
name       = 'cs52'
vif        = ['ip=XX.XX.XX.XX, vifname=vifcs520,  mac=aa:00:2f:ff:e4:01 ']
vnc        = 0
cpu_weight = 512
cpu_cap    = 50
vncviewer  = 0
serial     = 'pty'
disk       = ['phy:/dev/VolGroup00/cs52_rootimg,sda1,w', 'phy:/dev/VolGroup00/cs52_vmswap,sda2,w']
root = '/dev/sda1 ro'

 
xm dmesg
 __  __            _____  _____  ___
 \ \/ /___ _ __   |___ / |___ / / _ \
  \  // _ \ '_ \    |_ \   |_ \| | | |
  /  \  __/ | | |  ___) | ___) | |_| |
 /_/\_\___|_| |_| |____(_)____(_)___/

(XEN) Xen version 3.3.0 (root) (gcc version 4.1.2 20071124 (Red Hat 4.1.2-42)) Wed Aug 27 21:46:35 CEST 2008
(XEN) Latest ChangeSet: unavailable
(XEN) Command line: dom0_mem=512M
(XEN) Video information:
(XEN)  VGA is text mode 80x25, font 8x16
(XEN)  VBE/DDC methods: none; EDID transfer time: 2 seconds
(XEN)  EDID info not retrieved because no DDC retrieval method detected
(XEN) Disc information:
(XEN)  Found 2 MBR signatures
(XEN)  Found 2 EDD information structures
(XEN) Xen-e820 RAM map:
(XEN)  0000000000000000 - 000000000009fc00 (usable)
(XEN)  000000000009fc00 - 00000000000a0000 (reserved)
(XEN)  00000000000e0000 - 0000000000100000 (reserved)
(XEN)  0000000000100000 - 00000000bfe76000 (usable)
(XEN)  00000000bfe76000 - 00000000bfee9000 (ACPI NVS)
(XEN)  00000000bfee9000 - 00000000bfeed000 (usable)
(XEN)  00000000bfeed000 - 00000000bfeff000 (ACPI data)
(XEN)  00000000bfeff000 - 00000000bff00000 (usable)
(XEN) System RAM: 3070MB (3143784kB)
(XEN) ACPI: RSDP 000FE020, 0014 (r0 INTEL )
(XEN) ACPI: RSDT BFEFDE48, 0038 (r1 INTEL  04DT044       2A2 MSFT  1000013)
(XEN) ACPI: FACP BFEFCF10, 0074 (r1 INTEL  04DT044       2A2 MSFT  1000013)
(XEN) ACPI: DSDT BFEF8010, 3D37 (r1 INTEL  04DT044       2A2 MSFT  1000013)
(XEN) ACPI: FACS BFEE6C40, 0040
(XEN) ACPI: APIC BFEFCE10, 0084 (r1 INTEL  04DT044       2A2 MSFT  1000013)
(XEN) ACPI: WDDT BFEF7F90, 0040 (r1 INTEL  04DT044       2A2 MSFT  1000013)
(XEN) ACPI: MCFG BFEF7F10, 003C (r1 INTEL  04DT044       2A2 MSFT  1000013)
(XEN) ACPI: ASF! BFEFCD10, 00A6 (r32 INTEL  04DT044       2A2 MSFT  1000013)
(XEN) Xen heap: 9MB (9704kB)
(XEN) Domain heap initialised
(XEN) Processor #0 15:4 APIC version 20
(XEN) Processor #1 15:4 APIC version 20
(XEN) IOAPIC[0]: apic_id 5, version 32, address 0xfec00000, GSI 0-23
(XEN) IOAPIC[1]: apic_id 6, version 32, address 0xfec10000, GSI 30-53
(XEN) Enabling APIC mode:  Flat.  Using 2 I/O APICs
(XEN) Using scheduler: SMP Credit Scheduler (credit)
(XEN) Detected 2660.032 MHz processor.
(XEN) CPU0: Intel(R) Pentium(R) 5 CPU 2.66GHz stepping 07
(XEN) Booting processor 1/1 eip 8c000
(XEN) CPU1: Intel(R) Pentium(R) 5 CPU 2.66GHz stepping 07
(XEN) Total of 2 processors activated.
(XEN) ENABLING IO-APIC IRQs
(XEN)  -> Using new ACK method
(XEN) checking TSC synchronization across 2 CPUs: passed.
(XEN) Platform timer is 3.579MHz ACPI PM Timer
(XEN) Brought up 2 CPUs
(XEN) I/O virtualisation disabled
(XEN) *** LOADING DOMAIN 0 ***
(XEN)  Xen  kernel: 32-bit, PAE, lsb
(XEN)  Dom0 kernel: 32-bit, PAE, lsb, paddr 0xc0400000 -> 0xc07ce000
(XEN) PHYSICAL MEMORY ARRANGEMENT:
(XEN)  Dom0 alloc.:   000000003e000000->000000003f000000 (126976 pages to be allocated)
(XEN) VIRTUAL MEMORY ARRANGEMENT:
(XEN)  Loaded kernel: c0400000->c07ce000
(XEN)  Init. ramdisk: c07ce000->c0e96200
(XEN)  Phys-Mach map: c0e97000->c0f17000
(XEN)  Start info:    c0f17000->c0f17474
(XEN)  Page tables:   c0f18000->c0f25000
(XEN)  Boot stack:    c0f25000->c0f26000
(XEN)  TOTAL:         c0000000->c1000000
(XEN)  ENTRY ADDRESS: c0400000
(XEN) Dom0 has maximum 2 VCPUs
(XEN) Scrubbing Free RAM: ........................done.
(XEN) Xen trace buffers: disabled
(XEN) Std. Loglevel: Errors and warnings
(XEN) Guest Loglevel: Nothing (Rate-limited: Errors and warnings)
(XEN) Xen is relinquishing VGA console.
(XEN) *** Serial input -> DOM0 (type 'CTRL-a' three times to switch input to Xen)
(XEN) Freed 100kB init memory.

[Kroko]

ve 3.3.x ano, ale v 3.0.3 ne