This is the output of 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): 32
On-line CPU(s) list: 0-31
Vendor ID: AuthenticAMD
Model name: AMD Ryzen Threadripper 1950X 16-Core Processor
CPU family: 23
Model: 1
Thread(s) per core: 2
Core(s) per socket: 16
Socket(s): 1
Stepping: 1
Microcode version: 0x8001129
Frequency boost: enabled
CPU(s) scaling MHz: 66%
CPU max MHz: 3400.0000
CPU min MHz: 2200.0000
BogoMIPS: 6786.53
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 cpuid extd_apicid amd_dcm aperfmperf rapl pni pclmulqdq monitor ssse3 fma cx16 sse4_1 sse4_2 movbe popcnt aes xsave avx f16c rdrand lahf_lm cmp_legacy extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw skinit wdt tce topoext perfctr_core perfctr_nb bpext perfctr_llc mwaitx cpb hw_pstate ssbd vmmcall fsgsbase bmi1 avx2 smep bmi2 rdseed adx smap clflushopt sha_ni xsaveopt xsavec xgetbv1 clzero xsaveerptr arat npt lbrv svm_lock nrip_save tsc_scale vmcb_clean flushbyasid decodeassists pausefilter pfthreshold avic v_vmsave_vmload vgif overflow_recov succor smca sev
L1d cache: 512 KiB (16 instances)
L1i cache: 1 MiB (16 instances)
L2 cache: 8 MiB (16 instances)
L3 cache: 32 MiB (4 instances)
NUMA node(s): 2
NUMA node0 CPU(s): 0-7,16-23
NUMA node1 CPU(s): 8-15,24-31
Vulnerability Gather data sampling: Not affected
Vulnerability Ghostwrite: Not affected
Vulnerability Indirect target selection: Not affected
Vulnerability Itlb multihit: Not affected
Vulnerability L1tf: Not affected
Vulnerability Mds: Not affected
Vulnerability Meltdown: Not affected
Vulnerability Mmio stale data: Not affected
Vulnerability Old microcode: Not affected
Vulnerability Reg file data sampling: Not affected
Vulnerability Retbleed: Mitigation; untrained return thunk; SMT vulnerable
Vulnerability Spec rstack overflow: Vulnerable: Safe RET, no microcode
Vulnerability Spec store bypass: Mitigation; Speculative Store Bypass disabled via prctl
Vulnerability Spectre v1: Mitigation; usercopy/swapgs barriers and __user pointer sanitization
Vulnerability Spectre v2: Mitigation; Retpolines; STIBP disabled; RSB filling; PBRSB-eIBRS Not affected; BHI Not affected
Vulnerability Srbds: Not affected
Vulnerability Tsa: Not affected
Vulnerability Tsx async abort: Not affected
Vulnerability Vmscape: Vulnerableand this is the output of lsmem
RANGE SIZE STATE REMOVABLE BLOCK
0x0000000000000000-0x000000007fffffff 2G online yes 0-15
0x0000000100000000-0x000000087fffffff 30G online yes 32-271
Memory block size: 128M
Total online memory: 32G
Total offline memory: 0B
Memmap on memory parameter: noI'm working on a Haskell project, and when I build it, I go for
As regards N, if I use 32 because my system has 32 CPUs, the system becomes fairly unresponsive, and some other applications are negatively impacted not just in terms of responsiveness, but also in that pieces of them start "crashing".
Here a report of some browser's tabs being SIGKILLed. It turned out it's the OOM killer doing its job.
But my question is: why is my system allowing this?
Yes, I'm the one passing -j32, but my intention is more to tell the system "don't limit yourself to using less than 32 cores", but without encouraging it to steal such cores away from other applications.
Am I just misunderstanding what's expected of a program when telling it to use all cores? Or is it that GHC is too aggressively stealing computational resources? Or something else?
Last edited by Enrico1989 (Today 13:56:30)
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