@tuxen I never saw such "performance mode" only very basic CPU settings, like cstate.

When i had C-state to auto I had never any issues with reboots (only had it running for 2 days straight), before I disabled the C-state.

I found out having C-state to auto my processors never reached their max clock frequence.
I did however never test to change the scaling-governor to performance.
I did not need to change this to performance to get full clockspeed when C-state was disabled. I just had to load the CPU.

@Silencer80
I've been experimenting some here because I had a hard time getting your performance numbers on cpu passmark.
Anyway this was related to c-state not being disabled in BIOS.
After disabling this i got the numbers you got through a VM. Very nice.
I had to do speedtests on network and disk, and one funny example is bandwidth which is heavy dependant on this. I used the xenpm set-scaling-governor performance to set the max cpu clock and xenpm set-scaling-governor ondemand to reset it to default. (both commands gives tons of error in cli, but it somehow works.
When I set this to ondemand, my network speed drops. It's somehow ironic as I have the demand for this speed, but the process does not demand, resulting in slower network transfer.
Is there anything to automate this? (I will probably turn on performanc emode when i need it, though its not really the best way of achiving this.

@stormi intel only it seems?

Interesting. Yes we all have different requirements.
We only use local storage to reduce complexity and money spend.
In that sense moving VM-s between servers takes longer than it would with a San (as whole disk needs to be moved aswell)
This is mainly the reason we want performance

@Silencer80 said in AMD Eypc 7402P ?:

o an IBM flash system 900. Th

My NVMe disks cant break 1GB/s on xen, on vmware however its 70% faster. Since they are on a pci-e (3gen) 2x the theoretical limit is 2GB/s afaik
they should also bring (due to pci limit) around 200k iops. I get maks 90k . Just curious

@Silencer80 very nice! mind pasting some harddrive speed test from your highspeed drives?

@ruskofd Ty
Don't have it yet, I'm just running alot of tests back to back. Will probably not need more than 32 vCPU but was just curious why I could only select 32. If it's only a xcp-ng manager problem, then it's all good

Thank you both @ruskofd and @ruskofd

FYI I used the XCP-NG Manager, did not try to add more vCPUs through xe

@olivierlambert

[09:13 xcp-ng-onvduxbl ~]# cat /proc/cpuinfo
processor       : 0
vendor_id       : AuthenticAMD
cpu family      : 23
model           : 49
model name      : AMD EPYC 7402P 24-Core Processor
stepping        : 0
microcode       : 0x830101c
cpu MHz         : 2800.165
cache size      : 512 KB
physical id     : 0
siblings        : 16
core id         : 0
cpu cores       : 16
apicid          : 0
initial apicid  : 0
fpu             : yes
fpu_exception   : yes
cpuid level     : 13
wp              : yes
flags           : fpu de tsc msr pae mce cx8 apic mca cmov pat clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt lm constant_tsc r                                            ep_good nopl nonstop_tsc cpuid extd_apicid pni pclmulqdq ssse3 fma cx16 sse4_1 sse4_2 movbe popcnt aes xsave avx f16c rdrand hypervisor                                             lahf_lm cmp_legacy abm sse4a misalignsse 3dnowprefetch bpext ssbd ibpb vmmcall fsgsbase bmi1 avx2 bmi2 rdseed adx clflushopt clwb sha_ni                                             xsaveopt xsavec xgetbv1 clzero arat rdpid
bugs            : fxsave_leak null_seg spectre_v1 spectre_v2 spec_store_bypass
bogomips        : 5600.03
TLB size        : 3072 4K pages
clflush size    : 64
cache_alignment : 64
address sizes   : 48 bits physical, 48 bits virtual
power management:

[09:15 xcp-ng-onvduxbl ~]# cat /etc/xensource-inventory
PRIMARY_DISK='/dev/disk/by-id/md-name-localhost:127'
PRODUCT_VERSION='8.0.0'
DOM0_VCPUS='16'
CONTROL_DOMAIN_UUID='d79f1f63-c627-49cb-b493-2cfb372b9e51'
DOM0_MEM='4304'
COMPANY_NAME_SHORT='Open Source'
MANAGEMENT_ADDRESS_TYPE='IPv4'
PARTITION_LAYOUT='ROOT,BACKUP,LOG,BOOT,SWAP,SR'
PRODUCT_VERSION_TEXT='8.0'
PRODUCT_BRAND='XCP-ng'
INSTALLATION_UUID='3a9c29f2-11f0-4f71-a457-be1be5973e79'
PRODUCT_VERSION_TEXT_SHORT='8.0'
BRAND_CONSOLE='XCP-ng Center'
PRODUCT_NAME='xenenterprise'
MANAGEMENT_INTERFACE='xenbr0'
COMPANY_PRODUCT_BRAND='XCP-ng'
PLATFORM_VERSION='3.0.0'
BUILD_NUMBER='release/naples/master/45'
STUNNEL_LEGACY='false'
PLATFORM_NAME='XCP'
BRAND_CONSOLE_URL='https://xcp-ng.org'
BACKUP_PARTITION='/dev/disk/by-id/md-name-localhost:127-part2'
INSTALLATION_DATE='2019-11-12 23:01:52.715183'
COMPANY_NAME='Open Source'

@olivierlambert
If you want me to do some testing or give some logs or w/e let me know.