Bug do Kernel: Acho que meu problema é com o kernel, como notado por goldilocks. Como eu aumentei minha memória RAM para 4GB todos os processos são estáveis, mesmo com a caixa do processador Intel Core 2 com 2GB de RAM também está funcionando bem.
Eu tenho 5 sistemas nos quais acabei de instalar o RHEL6. Configuração do sistema é
CPU-i7
HDD-500 GB
RAM-2 GB
Swap- 4 GB
Eu instalei o mesmo software e toda a configuração de acordo com sistemas antigos. Mas meus novos sistemas estão funcionando muito devagar!
A saída do comando top é a seguinte:
[root@localhost ~]# top
top - 12:27:56 up 24 min, 3 users, load average: 1.00, 1.00, 0.82
Tasks: 214 total, 2 running, 212 sleeping, 0 stopped, 0 zombie
Cpu(s): 1.1%us, 13.0%sy, 0.0%ni, 85.9%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Eu não tenho esse problema em meus sistemas antigos que estão tendo menos configurações do que os novos sistemas!
Atualização 1:
Concordo com Michael e Vonbrand .. Mas ainda tenho meu sistema muito lento. Especialmente quando estou compilando algo no meu QtCreator. Até meu movimento do mouse ficou lento.
Eu verifiquei adicionando comentários antes da partição swap em /etc/fstab e reinicializando, A troca mostra 0.0GB, mas o kswapd0 ainda usa 99% a 100%.
Por que outros processadores não estão utilizando o máximo!
Minha RAM (2 GB) é menor
OR
Existe algum serviço, que gerencia a CPU, não foi iniciado?
Atualização 2:
A saída de dmesg é:
ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
alloc irq_desc for 16 on node -1
alloc kstat_irqs on node -1
alloc irq_2_iommu on node -1
ehci_hcd 0000:00:1a.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16
ehci_hcd 0000:00:1a.0: setting latency timer to 64
ehci_hcd 0000:00:1a.0: EHCI Host Controller
ehci_hcd 0000:00:1a.0: new USB bus registered, assigned bus number 1
ehci_hcd 0000:00:1a.0: debug port 2
ehci_hcd 0000:00:1a.0: cache line size of 64 is not supported
ehci_hcd 0000:00:1a.0: irq 16, io mem 0xf7c38000
ehci_hcd 0000:00:1a.0: USB 2.0 started, EHCI 1.00
usb usb1: New USB device found, idVendor=1d6b, idProduct=0002
usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1
usb usb1: Product: EHCI Host Controller
usb usb1: Manufacturer: Linux 2.6.32-71.el6.x86_64 ehci_hcd
usb usb1: SerialNumber: 0000:00:1a.0
usb usb1: configuration #1 chosen from 1 choice
hub 1-0:1.0: USB hub found
hub 1-0:1.0: 3 ports detected
alloc irq_desc for 23 on node -1
alloc kstat_irqs on node -1
alloc irq_2_iommu on node -1
ehci_hcd 0000:00:1d.0: PCI INT A -> GSI 23 (level, low) -> IRQ 23
ehci_hcd 0000:00:1d.0: setting latency timer to 64
ehci_hcd 0000:00:1d.0: EHCI Host Controller
ehci_hcd 0000:00:1d.0: new USB bus registered, assigned bus number 2
ehci_hcd 0000:00:1d.0: debug port 2
ehci_hcd 0000:00:1d.0: cache line size of 64 is not supported
ehci_hcd 0000:00:1d.0: irq 23, io mem 0xf7c37000
ehci_hcd 0000:00:1d.0: USB 2.0 started, EHCI 1.00
usb usb2: New USB device found, idVendor=1d6b, idProduct=0002
usb usb2: New USB device strings: Mfr=3, Product=2, SerialNumber=1
usb usb2: Product: EHCI Host Controller
usb usb2: Manufacturer: Linux 2.6.32-71.el6.x86_64 ehci_hcd
usb usb2: SerialNumber: 0000:00:1d.0
usb usb2: configuration #1 chosen from 1 choice
hub 2-0:1.0: USB hub found
hub 2-0:1.0: 3 ports detected
ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
uhci_hcd: USB Universal Host Controller Interface driver
PNP: PS/2 Controller [PNP0303:PS2K,PNP0f03:PS2M] at 0x60,0x64 irq 1,12
serio: i8042 KBD port at 0x60,0x64 irq 1
serio: i8042 AUX port at 0x60,0x64 irq 12
mice: PS/2 mouse device common for all mice
rtc_cmos 00:06: RTC can wake from S4
rtc_cmos 00:06: rtc core: registered rtc_cmos as rtc0
rtc0: alarms up to one month, y3k, 242 bytes nvram, hpet irqs
cpuidle: using governor ladder
cpuidle: using governor menu
usbcore: registered new interface driver hiddev
usbcore: registered new interface driver usbhid
usbhid: v2.6:USB HID core driver
TCP cubic registered
Initializing XFRM netlink socket
NET: Registered protocol family 17
registered taskstats version 1
IMA: No TPM chip found, activating TPM-bypass!
rtc_cmos 00:06: setting system clock to 2013-03-04 14:10:29 UTC (1362406229)
Initalizing network drop monitor service
Freeing unused kernel memory: 1220k freed
Write protecting the kernel read-only data: 7176k
dracut: dracut-004-32.el6
dracut: rd_NO_LUKS: removing cryptoluks activation
dracut: rd_NO_LVM: removing LVM activation
device-mapper: uevent: version 1.0.3
device-mapper: ioctl: 4.17.0-ioctl (2010-03-05) initialised: [email protected]
udev: starting version 147
dracut: Starting plymouth daemon
dracut: rd_NO_DM: removing DM RAID activation
dracut: rd_NO_MD: removing MD RAID activation
ahci 0000:00:1f.2: version 3.0
ahci 0000:00:1f.2: PCI INT B -> GSI 19 (level, low) -> IRQ 19
alloc irq_desc for 31 on node -1
alloc kstat_irqs on node -1
alloc irq_2_iommu on node -1
ahci 0000:00:1f.2: irq 31 for MSI/MSI-X
ahci 0000:00:1f.2: AHCI 0001.0300 32 slots 6 ports 6 Gbps 0x5 impl SATA mode
ahci 0000:00:1f.2: flags: 64bit ncq pm led clo pio slum part ems apst
ahci 0000:00:1f.2: setting latency timer to 64
scsi0 : ahci
scsi1 : ahci
scsi2 : ahci
scsi3 : ahci
scsi4 : ahci
scsi5 : ahci
ata1: SATA max UDMA/133 abar m2048@0xf7c36000 port 0xf7c36100 irq 31
ata2: DUMMY
ata3: SATA max UDMA/133 abar m2048@0xf7c36000 port 0xf7c36200 irq 31
ata4: DUMMY
ata5: DUMMY
ata6: DUMMY
usb 1-1: new high speed USB device using ehci_hcd and address 2
usb 1-1: New USB device found, idVendor=8087, idProduct=0024
usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0
usb 1-1: configuration #1 chosen from 1 choice
hub 1-1:1.0: USB hub found
hub 1-1:1.0: 6 ports detected
ata3: SATA link up 1.5 Gbps (SStatus 113 SControl 300)
ata1: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
ata1.00: ACPI _SDD failed (AE 0x5)
ata3.00: ACPI _SDD failed (AE 0x5)
usb 2-1: new high speed USB device using ehci_hcd and address 2
usb 2-1: New USB device found, idVendor=8087, idProduct=0024
usb 2-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0
usb 2-1: configuration #1 chosen from 1 choice
hub 2-1:1.0: USB hub found
hub 2-1:1.0: 8 ports detected
usb 2-1.3: new low speed USB device using ehci_hcd and address 3
usb 2-1.3: New USB device found, idVendor=04ca, idProduct=0062
usb 2-1.3: New USB device strings: Mfr=0, Product=2, SerialNumber=0
usb 2-1.3: Product: USB Optical Mouse
usb 2-1.3: configuration #1 chosen from 1 choice
input: USB Optical Mouse as /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.3/2-1.3:1.0/input/input3
generic-usb 0003:04CA:0062.0001: input,hidraw0: USB HID v1.11 Mouse [USB Optical Mouse] on usb-0000:00:1d.0-1.3/input0
usb 2-1.4: new low speed USB device using ehci_hcd and address 4
usb 2-1.4: New USB device found, idVendor=03f0, idProduct=0024
usb 2-1.4: New USB device strings: Mfr=1, Product=2, SerialNumber=0
usb 2-1.4: Product: HP Basic USB Keyboard
usb 2-1.4: Manufacturer: CHICONY
usb 2-1.4: configuration #1 chosen from 1 choice
input: CHICONY HP Basic USB Keyboard as /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.4/2-1.4:1.0/input/input4
generic-usb 0003:03F0:0024.0002: input,hidraw1: USB HID v1.11 Keyboard [CHICONY HP Basic USB Keyboard] on usb-0000:00:1d.0-1.4/input0
ata3: SATA link up 1.5 Gbps (SStatus 113 SControl 300)
ata3.00: ACPI _SDD failed (AE 0x5)
ata3.00: ACPI: failed the second time, disabled
ata1: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
ata3.00: ATAPI: hp DVD-RAM GH82N, R204, max UDMA/100, ATAPI AN
ata1.00: ACPI _SDD failed (AE 0x5)
ata1.00: ACPI: failed the second time, disabled
ata1.00: ATA-8: ST500DM002-1BD142, HP73, max UDMA/100
ata1.00: 976773168 sectors, multi 16: LBA48 NCQ (depth 31/32)
ata1.00: configured for UDMA/100
ata3.00: configured for UDMA/100
scsi 0:0:0:0: Direct-Access ATA ST500DM002-1BD14 HP73 PQ: 0 ANSI: 5
scsi 2:0:0:0: CD-ROM hp DVD-RAM GH82N R204 PQ: 0 ANSI: 5
sd 0:0:0:0: [sda] 976773168 512-byte logical blocks: (500 GB/465 GiB)
sd 0:0:0:0: [sda] 4096-byte physical blocks
sd 0:0:0:0: [sda] Write Protect is off
sd 0:0:0:0: [sda] Mode Sense: 00 3a 00 00
sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
sda: sda1 sda2 sda3 sda4 < sda5 sda6 sda7 >
sd 0:0:0:0: [sda] Attached SCSI disk
sr0: scsi3-mmc drive: 40x/40x writer dvd-ram cd/rw xa/form2 cdda tray
Uniform CD-ROM driver Revision: 3.20
sr 2:0:0:0: Attached scsi CD-ROM sr0
EXT4-fs (sda7): INFO: recovery required on readonly filesystem
EXT4-fs (sda7): write access will be enabled during recovery
EXT4-fs (sda7): orphan cleanup on readonly fs
EXT4-fs (sda7): ext4_orphan_cleanup: deleting unreferenced inode 15341115
EXT4-fs (sda7): ext4_orphan_cleanup: deleting unreferenced inode 1835089
EXT4-fs (sda7): ext4_orphan_cleanup: deleting unreferenced inode 1835088
EXT4-fs (sda7): ext4_orphan_cleanup: deleting unreferenced inode 1835087
EXT4-fs (sda7): ext4_orphan_cleanup: deleting unreferenced inode 1835085
EXT4-fs (sda7): ext4_orphan_cleanup: deleting unreferenced inode 1835081
EXT4-fs (sda7): ext4_orphan_cleanup: deleting unreferenced inode 1835080
EXT4-fs (sda7): ext4_orphan_cleanup: deleting unreferenced inode 1835079
EXT4-fs (sda7): ext4_orphan_cleanup: deleting unreferenced inode 1835076
EXT4-fs (sda7): ext4_orphan_cleanup: deleting unreferenced inode 1835075
EXT4-fs (sda7): ext4_orphan_cleanup: deleting unreferenced inode 1835067
EXT4-fs (sda7): 11 orphan inodes deleted
EXT4-fs (sda7): recovery complete
EXT4-fs (sda7): mounted filesystem with ordered data mode
dracut: Mounted root filesystem /dev/sda7
dracut: Loading SELinux policy
SELinux: Disabled at runtime.
SELinux: Unregistering netfilter hooks
type=1404 audit(1362406240.622:2): selinux=0 auid=4294967295 ses=4294967295
dracut: /sbin/load_policy: Can't load policy: No such file or directory
dracut: Switching root
udev: starting version 147
e1000e: Intel(R) PRO/1000 Network Driver - 1.2.7-k2
e1000e: Copyright (c) 1999 - 2009 Intel Corporation.
alloc irq_desc for 20 on node -1
alloc kstat_irqs on node -1
alloc irq_2_iommu on node -1
e1000e 0000:00:19.0: PCI INT A -> GSI 20 (level, low) -> IRQ 20
e1000e 0000:00:19.0: setting latency timer to 64
alloc irq_desc for 32 on node -1
alloc kstat_irqs on node -1
alloc irq_2_iommu on node -1
e1000e 0000:00:19.0: irq 32 for MSI/MSI-X
0000:00:19.0: eth0: (PCI Express:2.5GB/s:Width x1) 6c:3b:e5:13:26:21
0000:00:19.0: eth0: Intel(R) PRO/1000 Network Connection
0000:00:19.0: eth0: MAC: 10, PHY: 11, PBA No: 0100ff-0ff
sd 0:0:0:0: Attached scsi generic sg0 type 0
sr 2:0:0:0: Attached scsi generic sg1 type 5
ACPI: WMI: Mapper loaded
EXT4-fs (sda5): mounted filesystem with ordered data mode
microcode: CPU0 sig=0x306a9, pf=0x2, revision=0x12
platform microcode: firmware: requesting intel-ucode/06-3a-09
microcode: CPU1 sig=0x306a9, pf=0x2, revision=0x12
platform microcode: firmware: requesting intel-ucode/06-3a-09
microcode: CPU2 sig=0x306a9, pf=0x2, revision=0x12
platform microcode: firmware: requesting intel-ucode/06-3a-09
microcode: CPU3 sig=0x306a9, pf=0x2, revision=0x12
platform microcode: firmware: requesting intel-ucode/06-3a-09
microcode: CPU4 sig=0x306a9, pf=0x2, revision=0x12
platform microcode: firmware: requesting intel-ucode/06-3a-09
microcode: CPU5 sig=0x306a9, pf=0x2, revision=0x12
platform microcode: firmware: requesting intel-ucode/06-3a-09
microcode: CPU6 sig=0x306a9, pf=0x2, revision=0x12
platform microcode: firmware: requesting intel-ucode/06-3a-09
microcode: CPU7 sig=0x306a9, pf=0x2, revision=0x12
platform microcode: firmware: requesting intel-ucode/06-3a-09
Microcode Update Driver: v2.00 <[email protected]>, Peter Oruba
Microcode Update Driver: v2.00 removed.
ip_tables: (C) 2000-2006 Netfilter Core Team
NET: Registered protocol family 10
lo: Disabled Privacy Extensions
e1000e 0000:00:19.0: irq 32 for MSI/MSI-X
e1000e 0000:00:19.0: irq 32 for MSI/MSI-X
ADDRCONF(NETDEV_UP): eth0: link is not ready
e1000e: eth0 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: None
ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
eth0: no IPv6 routers present
RPC: Registered udp transport module.
RPC: Registered tcp transport module.
RPC: Registered tcp NFSv4.1 backchannel transport module.
Bridge firewalling registered
virbr0: starting userspace STP failed, starting kernel STP
nf_conntrack version 0.5.0 (16384 buckets, 65536 max)
Ebtables v2.0 registered
fuse init (API version 7.13)
ip6_tables: (C) 2000-2006 Netfilter Core Team
lo: Disabled Privacy Extensions
tun: Universal TUN/TAP device driver, 1.6
tun: (C) 1999-2004 Max Krasnyansky <[email protected]>
device vnet0 entered promiscuous mode
virbr0: topology change detected, propagating
virbr0: port 1(vnet0) entering forwarding state
vnet0: no IPv6 routers present
kvm: 3639: cpu0 unimplemented perfctr wrmsr: 0xc1 data 0x0
kvm: 3639: cpu0 unimplemented perfctr wrmsr: 0x186 data 0x130079
kvm: 3639: cpu0 unimplemented perfctr wrmsr: 0xc1 data 0xffcc3e1a
kvm: 3639: cpu0 unimplemented perfctr wrmsr: 0x186 data 0x530079
kvm: 3639: cpu1 unimplemented perfctr wrmsr: 0xc1 data 0x0
kvm: 3639: cpu1 unimplemented perfctr wrmsr: 0x186 data 0x130079
kvm: 3639: cpu1 unimplemented perfctr wrmsr: 0xc1 data 0xffcc3e1a
kvm: 3639: cpu1 unimplemented perfctr wrmsr: 0x186 data 0x530079
kvm: 3639: cpu2 unimplemented perfctr wrmsr: 0xc1 data 0x0
virbr0: port 1(vnet0) entering disabled state
device vnet0 left promiscuous mode
virbr0: port 1(vnet0) entering disabled state
Eu não notei nada relacionado a swap aqui.
Atualização 3:
Veja minha resposta abaixo, Its a kernel bug !
A% de CPU é baseada em uma CPU, então pode muito bem ser várias vezes 100%. E as médias de carga (o número médio de processos aguardando CPU) são baixas, a máquina está quase 90% inativa. Não há razão para se preocupar.
Como @vonbrand aponta, a porcentagem de uso da CPU é, por padrão, baseada em uma única CPU. Portanto, se um processo tiver vários threads, em um sistema multi-core ou multi-CPU, esse número pode facilmente exceder 100%.
Veja os totais encontrados na linha Cpu(s) perto do topo; Ele diz que seu sistema estava gastando 1,1% de seu tempo no espaço do usuário, 13,0% no código do sistema (basicamente o kernel) e 85,9% ocioso. Isso se alinha bem com um processador multi-core, onde um núcleo está operando a 100%.
Você pode alternar top entre os chamados modos Irix e Solaris pressionando shift i . Com o modo Irix desligado , o uso da CPU exibido será em todos os processadores e / ou núcleos, enquanto no modo Irix on , um núcleo totalmente utilizado será exibido como 100% um sistema multiprocessador totalmente equipado. Portanto, com o modo Irix desativado, em um sistema hipotético de 10 núcleos com dois núcleos totalmente utilizados e os outros totalmente ociosos, o uso da CPU será mostrado como 20% esperado em vez de 200%.
Pesquisando uma questão muito antiga aqui - mas eu tive esse mesmo problema. Para mim, o problema acabou sendo o MYSQLD rodando.
Para começar, notei que minhas verificações de saúde começaram a falhar depois de mudar para uma instância do t1-nano ubuntu em ec2 (1 núcleo de 512 ram). Na época, achei que ficaria bem b / c. Estava executando apenas o nginx com uma verificação de integridade estática, uma entrada 301 e algumas outras entradas de arquivo estático. Eu tinha esquecido que instalei o wordpress com o mysql alguns meses atrás para um amigo usar.
Eu veria a saída de TOP e veria kswapd0 mastigando toda a cpu. Não foi até que eu usei htop e ordenou por memória que eu vi que o mysql estava mastigando toda a memória.
Eu desinstalei o mysql e coisas normalizadas.