I just did a yum update on a CentOS 7 / Xen 4.6 server which took me from kernel-3.18.34-20.el7.x86_64 -> kernel-3.18.44-20.el7.x86_64
Indeed performance is significantly degraded. This issue didn't happen on the older kernel. Any ideas where it came from or how it can be fixed?
--
Chris Wik
Anu Internet Services
www.anu.net | www.cwik.ch
# cat /proc/cpuinfo
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 63
model name : Intel(R) Xeon(R) CPU E5-2637 v3 @ 3.50GHz
stepping : 2
microcode : 0x36
cpu MHz : 3500.090
cache size : 15360 KB
physical id : 0
siblings : 1
core id : 0
cpu cores : 1
apicid : 0
initial apicid : 0
fpu : yes
fpu_exception : yes
cpuid level : 15
wp : yes
flags : fpu de tsc msr pae mce cx8 apic sep mca cmov pat clflush acpi mmx fxsr sse sse2 ss ht syscall nx lm constant_tsc arch_perfmon rep_good nopl nonstop_tsc eagerfpu pni pclmulqdq monitor est ssse3 fma cx16 sse4_1 sse4_2 movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand hypervisor lahf_lm abm ida arat epb pln pts dtherm fsgsbase bmi1 avx2 bmi2 erms xsaveopt
bugs :
bogomips : 7000.18
clflush size : 64
cache_alignment : 64
address sizes : 46 bits physical, 48 bits virtual
power management:
# xl info
host : ****.localdomain
release : 3.18.44-20.el7.x86_64
version : #1 SMP Tue Oct 25 11:42:52 UTC 2016
machine : x86_64
nr_cpus : 1
max_cpu_id : 15
nr_nodes : 2
cores_per_socket : 1
threads_per_core : 1
cpu_mhz : 3500
hw_caps : bfebfbff:2c100800:00000000:00007f00:77fefbff:00000000:00000021:000037ab
virt_caps : hvm hvm_directio
total_memory : 130958
free_memory : 28003
sharing_freed_memory : 0
sharing_used_memory : 0
outstanding_claims : 0
free_cpus : 0
xen_major : 4
xen_minor : 6
xen_extra : .3-7.el7
xen_version : 4.6.3-7.el7
xen_caps : xen-3.0-x86_64 xen-3.0-x86_32p hvm-3.0-x86_32 hvm-3.0-x86_32p hvm-3.0-x86_64
xen_scheduler : credit
xen_pagesize : 4096
platform_params : virt_start=0xffff800000000000
xen_changeset : Wed Feb 15 02:12:22 2017 -0600 git:c359c64-dirty
xen_commandline : placeholder dom0_mem=1024M,max:1024M cpuinfo com1=115200,8n1 console=com1,tty loglvl=all guest_loglvl=all
cc_compiler : gcc (GCC) 4.8.5 20150623 (Red Hat 4.8.5-11)
cc_compile_by : mockbuild
cc_compile_domain : centos.org
cc_compile_date : Wed Feb 15 12:18:43 UTC 2017
xend_config_format : 4
Thanks in advance,
Chris
--
Chris Wik
Anu Internet Services
www.anu.net | www.cwik.ch
_______________________________________________ CentOS-virt mailing list CentOS-virt@xxxxxxxxxx https://lists.centos.org/mailman/listinfo/centos-virt
