Quote from: joblo on December 15, 2017, 06:46:49 PM

Quote from: mangoo on December 15, 2017, 05:03:07 PM

I've tried running cpuminer-opt 3.7.6 with lyra2z on a 48 CPU system - unfortunately, only 32 CPUs are used.

The program says "48 miner threads started, using 'lyra2z' algorithm", with or without -t 48 option.

cpuminer-opt 3.7.3 behaves correctly and runs on all 48 cores.

Can you clarify? Does it start 48 threads and run 2 on some cores? Posting the program output would help.
What kind of CPU architecture do you have, multisocket?

Edit: also what OS and please post command line. I always need this, I shouldn't have to ask.

Ubuntu 16.04.

When I start cpuminer-opt 3.7.6 on a 48 CPU system, in top/htop I can see only 32 CPUs are used (unexpected).
When I start cpuminer-opt 3.7.3 on a 48 CPU system, in top/htop I can see 48 CPUs are used (expected).

Didn't try other versions.

Command line:

Code:

# ./cpuminer -c config.conf -q
   ********** cpuminer-opt 3.7.6 ***********
   A CPU miner with multi algo support and optimized for CPUs
   with AES_NI and AVX2 and SHA extensions.
   BTC donation address: 12tdvfF7KmAsihBXQXynT6E6th2c2pByTT

CPU: AMD EPYC 7401P 24-Core Processor .
SW built on Dec 15 2017 with GCC 5.4.0.
CPU features: SSE2 AES AVX AVX2 SHA.
SW features: SSE2 AES AVX AVX2 SHA.
Algo features: AVX AVX2.
Start mining with AVX2.

[2017-12-15 22:06:13] Starting Stratum on stratum+tcp://address:port
[2017-12-15 22:06:13] 48 miner threads started, using 'lyra2z' algorithm.
[2017-12-15 22:06:13] Stratum difficulty set to 10

config.conf:

Code:

{

   "url" : "some-url:port",
   "user" : "some.01234.worker",
   "pass" : "pass",

   "algo" : "lyra2z",
   "api-bind" : 0
}

CPU: AMD Epyc (single CPU): http://www.amd.com/en/products/cpu/amd-epyc-7401p

Code:

# grep -c processor /proc/cpuinfo
48

Code:

processor : 47
vendor_id : AuthenticAMD
cpu family : 23
model : 1
model name : AMD EPYC 7401P 24-Core Processor
stepping : 2
microcode : 0x8001207
cpu MHz : 2000.000
cache size : 512 KB
physical id : 0
siblings : 48
core id : 0
cpu cores : 24
apicid : 61
initial apicid : 61
fpu : yes
fpu_exception : yes
cpuid level : 13
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp lm constant_tsc rep_good nopl nonstop_tsc extd_apicid amd_dcm aperfmperf pni pclmulqdq monitor ssse3 fma cx16 sse4_1 sse4_2 movbe popcnt aes xsave avx f16c rdrand lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw skinit wdt tce topoext perfctr_core perfctr_nb bpext perfctr_l2 mwaitx cpb hw_pstate vmmcall fsgsbase bmi1 avx2 smep bmi2 rdseed adx smap clflushopt sha_ni xsaveopt xsavec xgetbv1 xsaves clzero irperf arat npt lbrv svm_lock nrip_save tsc_scale vmcb_clean flushbyasid decodeassists pausefilter pfthreshold avic overflow_recov succor smca
bugs : fxsave_leak sysret_ss_attrs null_seg
bogomips : 3992.21
TLB size : 2560 4K pages
clflush size : 64
cache_alignment : 64
address sizes : 48 bits physical, 48 bits virtual
power management: ts ttp tm hwpstate cpb eff_freq_ro [13] [14]