Centos 7 terribly slow. Any way to improve?

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voleynik
Posts: 4
Joined: 2018/08/16 13:02:46

Centos 7 terribly slow. Any way to improve?

Post by voleynik » 2018/08/16 14:15:40

Hello friends.
I have a 1 year old Dell PC.
It had original WIn10 on it - it was very fast.
I decided to switch to Linux, particularly to "Centos" because it's the same as RH, which mostly runs in production everywhere.
Downloaded official version of Centos7, installed it. First worked with Gnome.
Painfully slow, everything, even typing in gedit.
Switched to KDE, little better, but hardly acceptable.
What is the method to troubleshoot it?
On windows I would go and disable services one-by-one until your internet access stops.
Then, you enable the last one which killed web access.
This way a very old PC with Win10 would run reasonably fast.
Any help would be greatly appreciated.
Thanks.

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TrevorH
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Re: Centos 7 terribly slow. Any way to improve?

Post by TrevorH » 2018/08/16 14:48:47

What are the specs of this machine?
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voleynik
Posts: 4
Joined: 2018/08/16 13:02:46

Re: Centos 7 terribly slow. Any way to improve?

Post by voleynik » 2018/08/16 18:11:35

Thanks a lot for answering my call for help.
I have collected some info about my PC.
I hope I did not over do it. Here it is:
1) ======================================================
[vo@dell-centos ~]$ cat /proc/cpuinfo
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 142
model name : Intel(R) Core(TM) i7-7500U CPU @ 2.70GHz
stepping : 9
microcode : 0x84
cpu MHz : 322.674
cache size : 4096 KB
physical id : 0
siblings : 4
core id : 0
cpu cores : 2
apicid : 0
initial apicid : 0
fpu : yes
fpu_exception : yes
cpuid level : 22
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 ht tm pbe syscall nx pdpe1gb rdtscp lm constant_tsc art arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf eagerfpu pni pclmulqdq dtes64 monitor ds_cpl vmx est tm2 ssse3 sdbg fma cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm 3dnowprefetch epb intel_pt ibrs ibpb stibp tpr_shadow vnmi flexpriority ept vpid fsgsbase tsc_adjust bmi1 avx2 smep bmi2 erms invpcid mpx rdseed adx smap clflushopt xsaveopt xsavec xgetbv1 dtherm ida arat pln pts hwp hwp_notify hwp_act_window hwp_epp spec_ctrl intel_stibp
bogomips : 5808.00
clflush size : 64
cache_alignment : 64
address sizes : 39 bits physical, 48 bits virtual
power management:

processor : 1
vendor_id : GenuineIntel
cpu family : 6
model : 142
model name : Intel(R) Core(TM) i7-7500U CPU @ 2.70GHz
stepping : 9
microcode : 0x84
cpu MHz : 313.293
cache size : 4096 KB
physical id : 0
siblings : 4
core id : 1
cpu cores : 2
apicid : 2
initial apicid : 2
fpu : yes
fpu_exception : yes
cpuid level : 22
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 ht tm pbe syscall nx pdpe1gb rdtscp lm constant_tsc art arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf eagerfpu pni pclmulqdq dtes64 monitor ds_cpl vmx est tm2 ssse3 sdbg fma cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm 3dnowprefetch epb intel_pt ibrs ibpb stibp tpr_shadow vnmi flexpriority ept vpid fsgsbase tsc_adjust bmi1 avx2 smep bmi2 erms invpcid mpx rdseed adx smap clflushopt xsaveopt xsavec xgetbv1 dtherm ida arat pln pts hwp hwp_notify hwp_act_window hwp_epp spec_ctrl intel_stibp
bogomips : 5808.00
clflush size : 64
cache_alignment : 64
address sizes : 39 bits physical, 48 bits virtual
power management:

processor : 2
vendor_id : GenuineIntel
cpu family : 6
model : 142
model name : Intel(R) Core(TM) i7-7500U CPU @ 2.70GHz
stepping : 9
microcode : 0x84
cpu MHz : 316.302
cache size : 4096 KB
physical id : 0
siblings : 4
core id : 0
cpu cores : 2
apicid : 1
initial apicid : 1
fpu : yes
fpu_exception : yes
cpuid level : 22
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 ht tm pbe syscall nx pdpe1gb rdtscp lm constant_tsc art arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf eagerfpu pni pclmulqdq dtes64 monitor ds_cpl vmx est tm2 ssse3 sdbg fma cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm 3dnowprefetch epb intel_pt ibrs ibpb stibp tpr_shadow vnmi flexpriority ept vpid fsgsbase tsc_adjust bmi1 avx2 smep bmi2 erms invpcid mpx rdseed adx smap clflushopt xsaveopt xsavec xgetbv1 dtherm ida arat pln pts hwp hwp_notify hwp_act_window hwp_epp spec_ctrl intel_stibp
bogomips : 5808.00
clflush size : 64
cache_alignment : 64
address sizes : 39 bits physical, 48 bits virtual
power management:

processor : 3
vendor_id : GenuineIntel
cpu family : 6
model : 142
model name : Intel(R) Core(TM) i7-7500U CPU @ 2.70GHz
stepping : 9
microcode : 0x84
cpu MHz : 294.885
cache size : 4096 KB
physical id : 0
siblings : 4
core id : 1
cpu cores : 2
apicid : 3
initial apicid : 3
fpu : yes
fpu_exception : yes
cpuid level : 22
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 ht tm pbe syscall nx pdpe1gb rdtscp lm constant_tsc art arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf eagerfpu pni pclmulqdq dtes64 monitor ds_cpl vmx est tm2 ssse3 sdbg fma cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm 3dnowprefetch epb intel_pt ibrs ibpb stibp tpr_shadow vnmi flexpriority ept vpid fsgsbase tsc_adjust bmi1 avx2 smep bmi2 erms invpcid mpx rdseed adx smap clflushopt xsaveopt xsavec xgetbv1 dtherm ida arat pln pts hwp hwp_notify hwp_act_window hwp_epp spec_ctrl intel_stibp
bogomips : 5808.00
clflush size : 64
cache_alignment : 64
address sizes : 39 bits physical, 48 bits virtual
power management:
======================================================================
2)
[vo@dell-centos ~]$ cat /proc/meminfo
MemTotal: 16082220 kB
MemFree: 11125852 kB
MemAvailable: 13253996 kB
Buffers: 2144 kB
Cached: 2511168 kB
SwapCached: 0 kB
Active: 3022860 kB
Inactive: 1392252 kB
Active(anon): 1903124 kB
Inactive(anon): 195868 kB
Active(file): 1119736 kB
Inactive(file): 1196384 kB
Unevictable: 32 kB
Mlocked: 32 kB
SwapTotal: 8126460 kB
SwapFree: 8126460 kB
Dirty: 460 kB
Writeback: 0 kB
AnonPages: 1901088 kB
Mapped: 367632 kB
Shmem: 197192 kB
Slab: 223588 kB
SReclaimable: 139756 kB
SUnreclaim: 83832 kB
KernelStack: 11472 kB
PageTables: 55352 kB
NFS_Unstable: 0 kB
Bounce: 0 kB
WritebackTmp: 0 kB
CommitLimit: 16167568 kB
Committed_AS: 6796872 kB
VmallocTotal: 34359738367 kB
VmallocUsed: 580792 kB
VmallocChunk: 34358423548 kB
HardwareCorrupted: 0 kB
AnonHugePages: 899072 kB
CmaTotal: 0 kB
CmaFree: 0 kB
HugePages_Total: 0
HugePages_Free: 0
HugePages_Rsvd: 0
HugePages_Surp: 0
Hugepagesize: 2048 kB
DirectMap4k: 210068 kB
DirectMap2M: 3796992 kB
DirectMap1G: 12582912 kB
[vo@dell-centos ~]$
=========================================================================
3)
[vo@dell-centos ~]$ uname -r
3.10.0-862.6.3.el7.x86_64
========================================================================
4)
[vo@dell-centos ~]$ uname -a
Linux dell-centos 3.10.0-862.6.3.el7.x86_64 #1 SMP Tue Jun 26 16:32:21 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux
======================================================================
5)
[vo@dell-centos ~]$ sudo lshw -short
H/W path Device Class Description
=====================================================
system Inspiron 5567 (0767)
/0 bus 05VRRG
/0/0 memory 64KiB BIOS
/0/3a memory 16GiB System Memory
/0/3a/0 memory 16GiB SODIMM DDR4 Synchronous 2400 MHz
/0/3a/1 memory DIMM [empty]
/0/3e memory 128KiB L1 cache
/0/3f memory 512KiB L2 cache
/0/40 memory 4MiB L3 cache
/0/41 processor Intel(R) Core(TM) i7-7500U CPU @ 2.70G
/0/100 bridge Xeon E3-1200 v6/7th Gen Core Processor
/0/100/2 display HD Graphics 620
/0/100/4 generic Xeon E3-1200 v5/E3-1500 v5/6th Gen Cor
/0/100/14 bus Sunrise Point-LP USB 3.0 xHCI Controll
/0/100/14/0 usb1 bus xHCI Host Controller
/0/100/14/0/1 input Microsoft(R) Compact Optical Mouse
/0/100/14/0/5 multimedia Integrated_Webcam_HD
/0/100/14/0/6 generic USB2.0-CRW
/0/100/14/0/7 input LGD AIT Touch Controller
/0/100/14/0/8 communication Bluetooth wireless interface
/0/100/14/1 usb2 bus xHCI Host Controller
/0/100/14.2 generic Sunrise Point-LP Thermal subsystem
/0/100/15 generic Sunrise Point-LP Serial IO I2C Control
/0/100/15.1 generic Sunrise Point-LP Serial IO I2C Control
/0/100/16 communication Sunrise Point-LP CSME HECI #1
/0/100/17 scsi0 storage Sunrise Point-LP SATA Controller [AHCI
/0/100/17/0 /dev/sda disk 1TB TOSHIBA MQ01ABD1
/0/100/17/0/1 volume 1GiB Linux filesystem partition
/0/100/17/0/2 /dev/sda2 volume 930GiB Linux LVM Physical Volume parti
/0/100/17/1 /dev/cdrom disk DVD+-RW DU-8A5LH
/0/100/1c bridge Sunrise Point-LP PCI Express Root Port
/0/100/1c/0 display Topaz XT [Radeon R7 M260/M265 / M340/M
/0/100/1c.4 bridge Sunrise Point-LP PCI Express Root Port
/0/100/1c.4/0 wlp2s0 network Wireless 3165
/0/100/1c.5 bridge Sunrise Point-LP PCI Express Root Port
/0/100/1c.5/0 p4p2 network RTL810xE PCI Express Fast Ethernet con
/0/100/1f bridge Sunrise Point-LP LPC Controller
/0/100/1f.2 memory Memory controller
/0/100/1f.3 multimedia Sunrise Point-LP HD Audio
/0/100/1f.4 bus Sunrise Point-LP SMBus
/0/1 system PnP device PNP0c02
/0/2 system PnP device PNP0b00
/0/3 generic PnP device INT3f0d
/0/4 input PnP device PNP0303
/0/5 generic PnP device DLL0767
/0/6 system PnP device PNP0c02
/0/7 system PnP device PNP0c02
/0/8 system PnP device PNP0c02
/0/9 system PnP device PNP0c02
/1 virbr0-nic network Ethernet interface
/2 virbr0 network Ethernet interface
[vo@dell-centos ~]$
======================================================================

6)
[vo@dell-centos ~]$ lscpu
Architecture: x86_64
CPU op-mode(s): 32-bit, 64-bit
Byte Order: Little Endian
CPU(s): 4
On-line CPU(s) list: 0-3
Thread(s) per core: 2
Core(s) per socket: 2
Socket(s): 1
NUMA node(s): 1
Vendor ID: GenuineIntel
CPU family: 6
Model: 142
Model name: Intel(R) Core(TM) i7-7500U CPU @ 2.70GHz
Stepping: 9
CPU MHz: 325.683
CPU max MHz: 3500.0000
CPU min MHz: 400.0000
BogoMIPS: 5808.00
Virtualization: VT-x
L1d cache: 32K
L1i cache: 32K
L2 cache: 256K
L3 cache: 4096K
NUMA node0 CPU(s): 0-3
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 ht tm pbe syscall nx pdpe1gb rdtscp lm constant_tsc art arch_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf eagerfpu pni pclmulqdq dtes64 monitor ds_cpl vmx est tm2 ssse3 sdbg fma cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm 3dnowprefetch epb intel_pt ibrs ibpb stibp tpr_shadow vnmi flexpriority ept vpid fsgsbase tsc_adjust bmi1 avx2 smep bmi2 erms invpcid mpx rdseed adx smap clflushopt xsaveopt xsavec xgetbv1 dtherm ida arat pln pts hwp hwp_notify hwp_act_window hwp_epp spec_ctrl intel_stibp
[vo@dell-centos ~]$

==============
The End

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TrevorH
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Re: Centos 7 terribly slow. Any way to improve?

Post by TrevorH » 2018/08/16 18:56:35

So that's a decent spec machine. What sort of things are slow? For example, a misconfigured DNS set up (wrong servers listed in /etc/resolv.conf) can lead to 30s timeouts on anything that wants to look up in DNS. That would affect ssh logins to the machine as it does a reverse lookup of the connecting ip address so you'd get a ~30s delay in logging on. Or maybe you're looking at a graphics problem and anything that uses the graphics is slow? Or a hard disk problem - in which case yum install hdparm then run hdparm -tT /dev/sda and show us the output. Also run `top` and see if something is looping and using all cpu.

Narrow it down for us. Which things are slow?
CentOS 5 died in March 2017 - migrate NOW!
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voleynik
Posts: 4
Joined: 2018/08/16 13:02:46

Re: Centos 7 terribly slow. Any way to improve?

Post by voleynik » 2018/08/17 04:47:17

1) hdparm:
[vo@dell-centos ~]$ sudo hdparm -tT /dev/sda
/dev/sda:
Timing cached reads: 3502 MB in 1.99 seconds = 1763.26 MB/sec
Timing buffered disk reads: 340 MB in 3.02 seconds = 112.76 MB/sec
[vo@dell-centos ~]$

2) top
Tasks: 260 total, 1 running, 259 sleeping, 0 stopped, 0 zombie
%Cpu(s): 3.7 us, 1.5 sy, 0.0 ni, 94.5 id, 0.1 wa, 0.0 hi, 0.2 si, 0.0 st
KiB Mem : 16082220 total, 10468740 free, 2335272 used, 3278208 buff/cache
KiB Swap: 8126460 total, 8126460 free, 0 used. 12722792 avail Mem

PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
27301 vo 20 0 1245852 66112 32444 S 6.3 0.4 0:29.29 chrome
24658 vo 20 0 684052 130348 70084 S 6.0 0.8 4:14.19 chrome
24619 vo 20 0 1680828 157696 71876 S 5.6 1.0 13:01.48 chrome
1712 root 20 0 398056 111556 74824 S 2.0 0.7 24:24.84 X
2936 vo 20 0 1230080 116340 51700 S 1.0 0.7 17:17.46 plasma-desktop
3408 vo 20 0 4930552 985256 40196 S 0.7 6.1 66:24.17 java
28302 vo 20 0 162104 2392 1572 R 0.7 0.0 0:00.22 top
2958 vo 20 0 1488180 79704 8724 S 0.3 0.5 1:42.32 mysqld
26911 root 20 0 0 0 0 S 0.3 0.0 0:00.16 kworker/u8:45
1 root 20 0 194148 7336 4172 S 0.0 0.0 0:50.07 systemd

Looks like IntelliJ IDEA with java eats a lot.

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TrevorH
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Re: Centos 7 terribly slow. Any way to improve?

Post by TrevorH » 2018/08/17 08:00:59

There's nothing there that shows a problem that I can see. That doesn't mean I don't believe you, it means there's nothing in that data that shows what it is. The cpu is not busy - 94.x% idle in that top output. You have 10GB RAM free and unused. Your disk sequential throughput is 112MB/s which is about average for a spinning rust device (though slow if it's an SSD).

Describe what's slow about the system? What sort of things are you doing that appear slow to you?
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tunk
Posts: 379
Joined: 2017/02/22 15:08:17

Re: Centos 7 terribly slow. Any way to improve?

Post by tunk » 2018/08/17 11:12:08

I'm probably barking up the wrong tree; what's your graphics card and what driver are you using?

voleynik
Posts: 4
Joined: 2018/08/16 13:02:46

Re: Centos 7 terribly slow. Any way to improve?

Post by voleynik » 2018/08/18 13:51:41

Hello "tunk":
thanks for participation in helping me.
Please find below the output of command
[vo@dell-centos ~]$ lspci -v
00:00.0 Host bridge: Intel Corporation Xeon E3-1200 v6/7th Gen Core Processor Host Bridge/DRAM Registers (rev 02)
Subsystem: Dell Device 0767
Flags: bus master, fast devsel, latency 0
Capabilities: <access denied>

00:02.0 VGA compatible controller: Intel Corporation HD Graphics 620 (rev 02) (prog-if 00 [VGA controller])
Subsystem: Dell Device 0767
Flags: bus master, fast devsel, latency 0, IRQ 128
Memory at d1000000 (64-bit, non-prefetchable)
Memory at b0000000 (64-bit, prefetchable)
I/O ports at f000 64]
Expansion ROM at <unassigned> [disabled]
Capabilities: <access denied>
Kernel driver in use: i915
Kernel modules: i915

00:04.0 Signal processing controller: Intel Corporation Xeon E3-1200 v5/E3-1500 v5/6th Gen Core Processor Thermal Subsystem (rev 02)
Subsystem: Dell Device 0767
Flags: bus master, fast devsel, latency 0, IRQ 10
Memory at d2220000 (64-bit, non-prefetchable)
Capabilities: <access denied>

00:14.0 USB controller: Intel Corporation Sunrise Point-LP USB 3.0 xHCI Controller (rev 21) (prog-if 30 [XHCI])
Subsystem: Dell Device 0767
Flags: bus master, medium devsel, latency 0, IRQ 125
Memory at d2210000 (64-bit, non-prefetchable)
Capabilities: <access denied>
Kernel driver in use: xhci_hcd

00:14.2 Signal processing controller: Intel Corporation Sunrise Point-LP Thermal subsystem (rev 21)
Subsystem: Dell Device 0767
Flags: bus master, fast devsel, latency 0, IRQ 11
Memory at d2238000 (64-bit, non-prefetchable)
Capabilities: <access denied>

00:15.0 Signal processing controller: Intel Corporation Sunrise Point-LP Serial IO I2C Controller #0 (rev 21)
Subsystem: Dell Device 0767
Flags: bus master, fast devsel, latency 0, IRQ 16
Memory at d2237000 (64-bit, non-prefetchable) 4K]
Capabilities: <access denied>
Kernel driver in use: intel-lpss

00:15.1 Signal processing controller: Intel Corporation Sunrise Point-LP Serial IO I2C Controller #1 (rev 21)
Subsystem: Dell Device 0767
Flags: bus master, fast devsel, latency 0, IRQ 17
Memory at d2236000 (64-bit, non-prefetchable) 4K]
Capabilities: <access denied>
Kernel driver in use: intel-lpss

00:16.0 Communication controller: Intel Corporation Sunrise Point-LP CSME HECI #1 (rev 21)
Subsystem: Dell Device 0767
Flags: bus master, fast devsel, latency 0, IRQ 130
Memory at d2235000 (64-bit, non-prefetchable) 4K]
Capabilities: <access denied>
Kernel driver in use: mei_me
Kernel modules: mei_me

00:17.0 SATA controller: Intel Corporation Sunrise Point-LP SATA Controller [AHCI mode] (rev 21) (prog-if 01 [AHCI 1.0])
Subsystem: Dell Device 0767
Flags: bus master, 66MHz, medium devsel, latency 0, IRQ 127
Memory at d2230000 (32-bit, non-prefetchable) 8K]
Memory at d2234000 (32-bit, non-prefetchable)
I/O ports at f090 8]
I/O ports at f080 4]
I/O ports at f060 32]
Memory at d2233000 (32-bit, non-prefetchable) 2K]
Capabilities: <access denied>
Kernel driver in use: ahci
Kernel modules: ahci

00:1c.0 PCI bridge: Intel Corporation Sunrise Point-LP PCI Express Root Port #1 (rev f1) (prog-if 00 [Normal decode])
Flags: bus master, fast devsel, latency 0, IRQ 122
Bus: primary=00, secondary=01, subordinate=01, sec-latency=0
I/O behind bridge: 0000e000-0000efff
Memory behind bridge: c0000000-d02fffff
Capabilities: <access denied>
Kernel driver in use: pcieport
Kernel modules: shpchp

00:1c.4 PCI bridge: Intel Corporation Sunrise Point-LP PCI Express Root Port #5 (rev f1) (prog-if 00 [Normal decode])
Flags: bus master, fast devsel, latency 0, IRQ 123
Bus: primary=00, secondary=02, subordinate=02, sec-latency=0
Memory behind bridge: d2100000-d21fffff
Capabilities: <access denied>
Kernel driver in use: pcieport
Kernel modules: shpchp

00:1c.5 PCI bridge: Intel Corporation Sunrise Point-LP PCI Express Root Port #6 (rev f1) (prog-if 00 [Normal decode])
Flags: bus master, fast devsel, latency 0, IRQ 124
Bus: primary=00, secondary=03, subordinate=03, sec-latency=0
I/O behind bridge: 0000d000-0000dfff
Memory behind bridge: d2000000-d20fffff
Capabilities: <access denied>
Kernel driver in use: pcieport
Kernel modules: shpchp

00:1f.0 ISA bridge: Intel Corporation Sunrise Point-LP LPC Controller (rev 21)
Subsystem: Dell Device 0767
Flags: bus master, medium devsel, latency 0

00:1f.2 Memory controller: Intel Corporation Sunrise Point-LP PMC (rev 21)
Subsystem: Dell Device 0767
Flags: bus master, fast devsel, latency 0
Memory at d222c000 (32-bit, non-prefetchable) 16K]

00:1f.3 Audio device: Intel Corporation Sunrise Point-LP HD Audio (rev 21)
Subsystem: Dell Device 0767
Flags: bus master, fast devsel, latency 32, IRQ 283
Memory at d2228000 (64-bit, non-prefetchable) 16K]
Memory at d2200000 (64-bit, non-prefetchable) 64K]
Capabilities: <access denied>
Kernel driver in use: snd_hda_intel
Kernel modules: snd_hda_intel, snd_soc_skl

00:1f.4 SMBus: Intel Corporation Sunrise Point-LP SMBus (rev 21)
Subsystem: Dell Device 0767
Flags: medium devsel, IRQ 16
Memory at d2232000 (64-bit, non-prefetchable)
I/O ports at f040 32]
Kernel driver in use: i801_smbus
Kernel modules: i2c_i801

01:00.0 Display controller: Advanced Micro Devices, Inc. [AMD/ATI] Topaz XT [Radeon R7 M260/M265 / M340/M360 / M440/M445] (rev c3)
Subsystem: Dell Radeon R7 M445
Flags: bus master, fast devsel, latency 0, IRQ 129
Memory at c0000000 (64-bit, prefetchable) 256M]
Memory at d0000000 (64-bit, prefetchable) 2M]
I/O ports at e000
Memory at d0200000 (32-bit, non-prefetchable) 256K]
Expansion ROM at d0240000 [disabled] 128K]
Capabilities: <access denied>
Kernel driver in use: amdgpu
Kernel modules: amdgpu

02:00.0 Network controller: Intel Corporation Wireless 3165 (rev 79)
Subsystem: Intel Corporation Device 4410
Flags: bus master, fast devsel, latency 0, IRQ 284
Memory at d2100000 (64-bit, non-prefetchable) 8K]
Capabilities: <access denied>
Kernel driver in use: iwlwifi
Kernel modules: iwlwifi

03:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL810xE PCI Express Fast Ethernet controller (rev 07)
Subsystem: Dell Device 0767
Flags: bus master, fast devsel, latency 0, IRQ 126
I/O ports at d000
Memory at d2004000 (64-bit, non-prefetchable)
Memory at d2000000 (64-bit, prefetchable)
Capabilities: <access denied>
Kernel driver in use: r8169
Kernel modules: r8169

[vo@dell-centos ~]$

Also, I have left my terminal program running over night and I saw the following error messages, which may suggest that my hardware is not healthy:
[vo@dell-centos ~]$
Message from syslogd@dell-centos at Aug 18 08:28:02 ...
kernel:mce: [Hardware Error]: CPU 0: Machine Check: 0 Bank 6: ee2000000040110a

Message from syslogd@dell-centos at Aug 18 08:28:02 ...
kernel:mce: [Hardware Error]: TSC 0 ADDR fef20000 MISC 43880000086

Message from syslogd@dell-centos at Aug 18 08:28:02 ...
kernel:mce: [Hardware Error]: PROCESSOR 0:806e9 TIME 1534570080 SOCKET 0 APIC 0 microcode 84

Message from syslogd@dell-centos at Aug 18 08:28:02 ...
kernel:mce: [Hardware Error]: CPU 0: Machine Check: 0 Bank 7: ee2000000040110a

Message from syslogd@dell-centos at Aug 18 08:28:02 ...
kernel:mce: [Hardware Error]: TSC 0 ADDR fef20040 MISC 43880000086

Message from syslogd@dell-centos at Aug 18 08:28:02 ...
kernel:mce: [Hardware Error]: PROCESSOR 0:806e9 TIME 1534570080 SOCKET 0 APIC 0 microcode 84

The most slowest apps are VLC and IntelliJ IDEA, just in case.

Thanks again.
VO.

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TrevorH
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Re: Centos 7 terribly slow. Any way to improve?

Post by TrevorH » 2018/08/18 15:10:46

I see you have an ATI video card there. Is it using the radeon driver or is it falling back to the catch-all 'vesa' one? Look in /var/log/Xorg.0.log for details and if you can't work it out, post it either here or on pastebin.centos.org if it's very large. Wrong video driver would certainly affect vlc, not sure about the IntelliJ thing as I have no idea what that is.

Also, machine checks are never a good thing :-( Do you have mcelog installed and running? If not install it and start it and wait for the next one and post the details from /var/log/messages about it.
CentOS 5 died in March 2017 - migrate NOW!
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