System

  1. xiRAID Classic shows better performance with enabled hyper-threading (HT).

    To find out if there is HT support on the CPU, run

    # cat /proc/cpuinfo | grep ht

    In the flags field, check for the ht flag.

    Command output example:

    flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ss ht syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon rep_good nopl xtopology cpuid tsc_known_freq pni pclmulqdq vmx ssse3 fma cx16 pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand hypervisor lahf_lm abm 3dnowprefetch cpuid_fault invpcid_single pti tpr_shadow vnmi flexpriority ept vpid ept_ad fsgsbase tsc_adjust bmi1 hle avx2 smep bmi2 erms invpcid rtm rdseed adx smap xsaveopt arat umip arch_capabilities

    To check if HT is enabled, run

    # lscpu

    If Thread(s) per core is 1, then HT is off. HT can be enabled in BIOS/UEFI.

    Command output example:

    Architecture:                    x86_64
CPU op-mode(s):                  32-bit, 64-bit
Byte Order:                      Little Endian
Address sizes:                   40 bits physical, 48 bits virtual
CPU(s):                          4
On-line CPU(s) list:             0-3
Thread(s) per core:              1
…

  2. The tuned-adm profile set to throughput-performance provides better performance on most of the tests:

    # tuned-adm profile throughput-performance