Bug#1114896: xgboost: flaky autopkgtest on amd64: sometimes quick, sometimes times out

[Paul Gevers <elbrus@debian.org>]

Hi,

On 10/10/25 09:37, Shengqi Chen wrote:
> Is it possible there are major ISA differences (e.g. AVX disabled), or
> something like cpu / memory over-subscription?


Does this help?

root@ci-worker13:~# lscpu
Architecture:                x86_64
  CPU op-mode(s):            32-bit, 64-bit
  Address sizes:             43 bits physical, 48 bits virtual
  Byte Order:                Little Endian
CPU(s):                      64
  On-line CPU(s) list:       0-63
Vendor ID:                   AuthenticAMD
  Model name:                AMD EPYC 7502P 32-Core Processor
    CPU family:              23
    Model:                   49
    Thread(s) per core:      2
    Core(s) per socket:      32
    Socket(s):               1
    Stepping:                0
    BogoMIPS:                4990.49
    Flags:                   fpu vme de pse tsc msr pae mce cx8 apic 
sep mtrr pge mca cmov pat pse36 clflus
                             h mmx fxsr sse sse2 ht syscall nx mmxext 
fxsr_opt pdpe1gb rdtscp lm constant_t
                             sc rep_good nopl xtopology nonstop_tsc 
cpuid extd_apicid aperfmperf rapl pni p
                             clmulqdq monitor ssse3 fma cx16 sse4_1 
sse4_2 x2apic movbe popcnt aes xsave av
                             x f16c rdrand lahf_lm cmp_legacy svm 
extapic cr8_legacy abm sse4a misalignsse
                             3dnowprefetch osvw ibs skinit wdt tce 
topoext perfctr_core perfctr_nb bpext pe
                             rfctr_llc mwaitx cpb cat_l3 cdp_l3 
hw_pstate ssbd mba ibrs ibpb stibp vmmcall
                             fsgsbase bmi1 avx2 smep bmi2 cqm rdt_a 
rdseed adx smap clflushopt clwb sha_ni
                             xsaveopt xsavec xgetbv1 xsaves cqm_llc 
cqm_occup_llc cqm_mbm_total cqm_mbm_loc
                             al clzero irperf xsaveerptr rdpru wbnoinvd 
amd_ppin arat npt lbrv svm_lock nri
                             p_save tsc_scale vmcb_clean flushbyasid 
decodeassists pausefilter pfthreshold
                             avic v_vmsave_vmload vgif v_spec_ctrl umip 
rdpid overflow_recov succor smca se
                             v sev_es
Virtualization features:
  Virtualization:            AMD-V
Caches (sum of all):
  L1d:                       1 MiB (32 instances)
  L1i:                       1 MiB (32 instances)
  L2:                        16 MiB (32 instances)
  L3:                        128 MiB (8 instances)
NUMA:
  NUMA node(s):              1
  NUMA node0 CPU(s):         0-63
Vulnerabilities:
  Gather data sampling:      Not affected
  Indirect target selection: Not affected
  Itlb multihit:             Not affected
  L1tf:                      Not affected
  Mds:                       Not affected
  Meltdown:                  Not affected
  Mmio stale data:           Not affected
  Reg file data sampling:    Not affected
  Retbleed:                  Mitigation; untrained return thunk; SMT 
enabled with STIBP protection
  Spec rstack overflow:      Mitigation; Safe RET
  Spec store bypass:         Mitigation; Speculative Store Bypass 
disabled via prctl
  Spectre v1:                Mitigation; usercopy/swapgs barriers and 
__user pointer sanitization
  Spectre v2:                Mitigation; Retpolines; IBPB conditional; 
STIBP always-on; RSB filling; PBRSB-
                             eIBRS Not affected; BHI Not affected
  Srbds:                     Not affected
  Tsa:                       Not affected
  Tsx async abort:           Not affected
  Vmscape:                   Mitigation; IBPB before exit to userspace

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