timfoster
commented
5 years ago I'm sorry I don't know the answer to your question, someone else might chime in.
In the meantime, a useful data-point might be that even when we have smt_enabled=false in the config, the system should still see that there are hyper-threaded processors available, they'll just appear as 'disabled':
[root@kura ~]# grep smt /usbkey/config
smt_enabled=false
[root@kura ~]# psrinfo
0 on-line since 09/25/2019 11:32:01
1 on-line since 09/25/2019 11:32:03
2 on-line since 09/25/2019 11:32:03
3 on-line since 09/25/2019 11:32:03
4 disabled since 09/25/2019 11:32:15
5 disabled since 09/25/2019 11:32:15
6 disabled since 09/25/2019 11:32:15
7 disabled since 09/25/2019 11:32:15
[root@kura ~]#enabling them:
[root@kura ~]# psradm -naF
[root@kura ~]# psrinfo
0 on-line since 09/25/2019 11:32:01
1 on-line since 09/25/2019 11:32:03
2 on-line since 09/25/2019 11:32:03
3 on-line since 09/25/2019 11:32:03
4 on-line since 09/25/2019 11:33:01
5 on-line since 09/25/2019 11:33:01
6 on-line since 09/25/2019 11:33:01
7 on-line since 09/25/2019 11:33:01
[root@kura ~]#attempting to disable again:
[root@kura ~]# psradm -aS
Failed to disable simultaneous multi-threading: Device busy
[root@kura ~]#(I wait a bit, then try again)
[root@kura ~]# psradm -aS
[root@kura ~]# psrinfo
0 on-line since 09/25/2019 11:32:01
1 on-line since 09/25/2019 11:32:03
2 on-line since 09/25/2019 11:32:03
3 on-line since 09/25/2019 11:32:03
4 disabled since 09/25/2019 11:33:17
5 disabled since 09/25/2019 11:33:19
6 disabled since 09/25/2019 11:33:19
7 disabled since 09/25/2019 11:33:19
[root@kura ~]#
StevenWilliams
jlevon
So I have a Dell PowerEdge C6220 II with 2 x Xeon E5 2680v2 (20 cores total, 40 threads). I have enabled Hyperthreading in the BIOS and it works in Linux. However it does not seem to be working in SmartOS. smt_enabled=true is set in the config, but it seems like that option is being ignored. I've been told in the IRC that you guys might have set it to disable hyperthreading by default, is there a way to enable it again?
Boot: Loading unix... Loading /platform/i86pc/amd64/boot_archive..., /platform/i86pc/amd64/boot_archive.hash... Booting... Sun OS Release 5.11 Version joyent_20190912T024836Z 64-Bit.Notice: System detected 40 cpus but only 20 cpu(s) were enabled during boot. Notice: Use "boot-ncpus" parameter to enable more CPU(s).
psradm -naF - had no effect.
[root@dime-dallas1 /var]# prtpicl / (picl, 122100000001) platform (upa, 122100000005) scsi_vhci (devctl, 122100000070) disk (fabric, 12210000008c) multipath (multipath, 1221000000c2) disk (fabric, 1221000000d1) multipath (multipath, 122100000107) pci (pciex, 122100000120) pci1028,518 (obp-device, 122100000134) pci8086,e02 (pciex, 122100000156) pci1028,518 (obp-device, 12210000017e) pci1028,518 (obp-device, 1221000001b0) pci8086,e04 (pciex, 1221000001e2) pci1000,3040 (obp-device, 12210000020b) iport (devctl, 122100000250) smp (smp, 12210000026c) enclosure (scsi, 12210000027d) iport (devctl, 122100000297) pci1028,518 (obp-device, 1221000002ad) pci1028,518 (obp-device, 1221000002d1) pci1028,518 (obp-device, 1221000002f5) pci1028,518 (obp-device, 122100000319) pci1028,518 (obp-device, 12210000033d) pci1028,518 (obp-device, 122100000361) pci1028,518 (obp-device, 122100000385) pci1028,518 (obp-device, 1221000003a9) pci1028,518 (obp-device, 1221000003cd) pci1028,518 (obp-device, 1221000003ef) pci1028,518 (obp-device, 122100000411) pci1028,518 (obp-device, 122100000433) pci8086,1d3e (pciex, 122100000456) pci1028,518 (obp-device, 122100000476) pci1028,518 (obp-device, 122100000496) pci1028,518 (obp-device, 1221000004b6) hub (obp-device, 1221000004e1) hub (obp-device, 12210000050d) device (obp-device, 12210000053c) keyboard (obp-device, 12210000055e) mouse (obp-device, 12210000057b) mouse (obp-device, 122100000598) pci8086,1d10 (pciex, 1221000005b5) pci1a03,1150 (pci, 1221000005dd) display (display, 122100000605) pci1028,518 (obp-device, 12210000062c) hub (obp-device, 122100000657) storage (obp-device, 122100000683) disk (block, 1221000006b1) pci8086,244e (pci, 1221000006e4) isa (isa, 122100000703) asy (serial, 122100000727) i8042 (obp-device, 122100000735) pci1028,518 (obp-device, 12210000073f) pci1028,518 (obp-device, 122100000771) pci (pciex, 1221000007aa) pci1028,518 (obp-device, 1221000007bc) pci1028,518 (obp-device, 1221000007da) pci1028,518 (obp-device, 1221000007f8) pci1028,518 (obp-device, 122100000816) pci1028,518 (obp-device, 122100000834) pci1028,518 (obp-device, 122100000852) pci1028,518 (obp-device, 122100000870) pci1028,518 (obp-device, 122100000892) pci1028,518 (obp-device, 1221000008b4) pci1028,518 (obp-device, 1221000008d2) pci1028,518 (obp-device, 1221000008f0) pci1028,518 (obp-device, 12210000090e) pci1028,518 (obp-device, 12210000092c) pci1028,518 (obp-device, 12210000094a) pci1028,518 (obp-device, 122100000968) pci1028,518 (obp-device, 122100000986) pci1028,518 (obp-device, 1221000009a4) pci1028,518 (obp-device, 1221000009c2) pci1028,518 (obp-device, 1221000009e0) pci1028,518 (obp-device, 122100000a02) pci1028,518 (obp-device, 122100000a20) pci1028,518 (obp-device, 122100000a46) pci1028,518 (obp-device, 122100000a6c) pci1028,518 (obp-device, 122100000a92) pci1028,518 (obp-device, 122100000ab8) pci1028,518 (obp-device, 122100000ade) pci1028,518 (obp-device, 122100000b04) pci1028,518 (obp-device, 122100000b26) pci1028,518 (obp-device, 122100000b48) pci1028,518 (obp-device, 122100000b6a) pci1028,518 (obp-device, 122100000b8c) pci1028,518 (obp-device, 122100000bae) pci1028,518 (obp-device, 122100000bd0) pci1028,518 (obp-device, 122100000bf2) pci1028,518 (obp-device, 122100000c14) pci1028,518 (obp-device, 122100000c32) pci1028,518 (obp-device, 122100000c50) pci1028,518 (obp-device, 122100000c6e) pci1028,518 (obp-device, 122100000c8c) pci1028,518 (obp-device, 122100000cae) pci1028,518 (obp-device, 122100000cd0) pci (pciex, 122100000cf2) pci8086,e04 (pciex, 122100000d06) pci8086,e06 (pciex, 122100000d27) pci1170,4c (obp-device, 122100000d50) pci1170,4c (obp-device, 122100000d80) pci1028,518 (obp-device, 122100000db0) pci1028,518 (obp-device, 122100000dd4) pci1028,518 (obp-device, 122100000df8) pci1028,518 (obp-device, 122100000e1c) pci1028,518 (obp-device, 122100000e40) pci1028,518 (obp-device, 122100000e64) pci1028,518 (obp-device, 122100000e88) pci1028,518 (obp-device, 122100000eac) pci1028,518 (obp-device, 122100000ed0) pci1028,518 (obp-device, 122100000ef2) pci1028,518 (obp-device, 122100000f14) pci1028,518 (obp-device, 122100000f36) pci (pciex, 122100000f59) pci1028,518 (obp-device, 122100000f6b) pci1028,518 (obp-device, 122100000f89) pci1028,518 (obp-device, 122100000fa7) pci1028,518 (obp-device, 122100000fc5) pci1028,518 (obp-device, 122100000fe3) pci1028,518 (obp-device, 122100001001) pci1028,518 (obp-device, 12210000101f) pci1028,518 (obp-device, 122100001041) pci1028,518 (obp-device, 122100001063) pci1028,518 (obp-device, 122100001081) pci1028,518 (obp-device, 12210000109f) pci1028,518 (obp-device, 1221000010bd) pci1028,518 (obp-device, 1221000010db) pci1028,518 (obp-device, 1221000010f9) pci1028,518 (obp-device, 122100001117) pci1028,518 (obp-device, 122100001135) pci1028,518 (obp-device, 122100001153) pci1028,518 (obp-device, 122100001171) pci1028,518 (obp-device, 12210000118f) pci1028,518 (obp-device, 1221000011b1) pci1028,518 (obp-device, 1221000011cf) pci1028,518 (obp-device, 1221000011f5) pci1028,518 (obp-device, 12210000121b) pci1028,518 (obp-device, 122100001241) pci1028,518 (obp-device, 122100001267) pci1028,518 (obp-device, 12210000128d) pci1028,518 (obp-device, 1221000012b3) pci1028,518 (obp-device, 1221000012d5) pci1028,518 (obp-device, 1221000012f7) pci1028,518 (obp-device, 122100001319) pci1028,518 (obp-device, 12210000133b) pci1028,518 (obp-device, 12210000135d) pci1028,518 (obp-device, 12210000137f) pci1028,518 (obp-device, 1221000013a1) pci1028,518 (obp-device, 1221000013c3) pci1028,518 (obp-device, 1221000013e1) pci1028,518 (obp-device, 1221000013ff) pci1028,518 (obp-device, 12210000141d) pci1028,518 (obp-device, 12210000143b) pci1028,518 (obp-device, 12210000145d) pci1028,518 (obp-device, 12210000147f) pseudo (devctl, 1221000014cd) zconsnex (devctl, 1221000014d7) zfdnex (devctl, 1221000014e1) power (power_button, 1221000014eb) ppm (ppm, 1221000014f5) stmf (admin, 122100001585) stmf_sbd (admin, 12210000158d) coretemp (chip0.core0, 122100001596) imc (mc-imc-0, 12210000159e) xsvc (obp-device, 1221000015a6) cpus (cpus, 1221000015b1) cpu (cpu, 1221000015b9) cpu (cpu, 1221000015d8) cpu (cpu, 1221000015f7) cpu (cpu, 122100001616) cpu (cpu, 122100001635) cpu (cpu, 122100001654) cpu (cpu, 122100001673) cpu (cpu, 122100001692) cpu (cpu, 1221000016b1) cpu (cpu, 1221000016d0) cpu (cpu, 1221000016ef) cpu (cpu, 12210000170e) cpu (cpu, 12210000172d) cpu (cpu, 12210000174c) cpu (cpu, 12210000176b) cpu (cpu, 12210000178a) cpu (cpu, 1221000017a9) cpu (cpu, 1221000017c8) cpu (cpu, 1221000017e7) cpu (cpu, 122100001806) obp (picl, 12210000006d) ramdisk (ramdisk, 122100000116) ioapics (ioapics, 122100000792) ioapic (ioapic, 122100000798) ioapic (ioapic, 1221000007a1) used-resources (used-resources, 1221000014a1) iscsi (iscsi, 1221000014aa) options (options, 1221000014c3) [root@dime-dallas1 /var]# mdb -ke 'boot_ncpus/D; ncpus/D' boot_ncpus: boot_ncpus: 40
ncpus: ncpus: 20
[root@dime-dallas1 /var]# mdb -ke 'boot_max_ncpus/D' boot_max_ncpus: boot_max_ncpus: 40
[root@dime-dallas1 /var]# mdb -ke smt_boot_disable/D smt_boot_disable: smt_boot_disable: 0
[root@dime-dallas1 /var]# mdb -ke smt_enabled/D smt_enabled: smt_enabled: 0
[root@dime-dallas1 /var]# psrinfo 0 on-line since 09/24/2019 23:59:02 1 on-line since 09/24/2019 23:59:04 2 on-line since 09/24/2019 23:59:04 3 on-line since 09/24/2019 23:59:04 4 on-line since 09/24/2019 23:59:04 5 on-line since 09/24/2019 23:59:04 6 on-line since 09/24/2019 23:59:04 7 on-line since 09/24/2019 23:59:04 8 on-line since 09/24/2019 23:59:04 9 on-line since 09/24/2019 23:59:04 10 on-line since 09/24/2019 23:59:04 11 on-line since 09/24/2019 23:59:04 12 on-line since 09/24/2019 23:59:05 13 on-line since 09/24/2019 23:59:05 14 on-line since 09/24/2019 23:59:05 15 on-line since 09/24/2019 23:59:05 16 on-line since 09/24/2019 23:59:05 17 on-line since 09/24/2019 23:59:05 18 on-line since 09/24/2019 23:59:05 19 on-line since 09/24/2019 23:59:05 [root@dime-dallas1 /var]# psrinfo -v Status of virtual processor 0 as of: 09/25/2019 00:15:07 on-line since 09/24/2019 23:59:02. The i386 processor operates at 2800 MHz, and has an i387 compatible floating point processor. Status of virtual processor 1 as of: 09/25/2019 00:15:07 on-line since 09/24/2019 23:59:04. The i386 processor operates at 2800 MHz, and has an i387 compatible floating point processor. Status of virtual processor 2 as of: 09/25/2019 00:15:07 on-line since 09/24/2019 23:59:04. The i386 processor operates at 2800 MHz, and has an i387 compatible floating point processor. Status of virtual processor 3 as of: 09/25/2019 00:15:07 on-line since 09/24/2019 23:59:04. The i386 processor operates at 2800 MHz, and has an i387 compatible floating point processor. Status of virtual processor 4 as of: 09/25/2019 00:15:07 on-line since 09/24/2019 23:59:04. The i386 processor operates at 2800 MHz, and has an i387 compatible floating point processor. Status of virtual processor 5 as of: 09/25/2019 00:15:07 on-line since 09/24/2019 23:59:04. The i386 processor operates at 2800 MHz, and has an i387 compatible floating point processor. Status of virtual processor 6 as of: 09/25/2019 00:15:07 on-line since 09/24/2019 23:59:04. The i386 processor operates at 2800 MHz, and has an i387 compatible floating point processor. Status of virtual processor 7 as of: 09/25/2019 00:15:07 on-line since 09/24/2019 23:59:04. The i386 processor operates at 2800 MHz, and has an i387 compatible floating point processor. Status of virtual processor 8 as of: 09/25/2019 00:15:07 on-line since 09/24/2019 23:59:04. The i386 processor operates at 2800 MHz, and has an i387 compatible floating point processor. Status of virtual processor 9 as of: 09/25/2019 00:15:07 on-line since 09/24/2019 23:59:04. The i386 processor operates at 2800 MHz, and has an i387 compatible floating point processor. Status of virtual processor 10 as of: 09/25/2019 00:15:07 on-line since 09/24/2019 23:59:04. The i386 processor operates at 2800 MHz, and has an i387 compatible floating point processor. Status of virtual processor 11 as of: 09/25/2019 00:15:07 on-line since 09/24/2019 23:59:04. The i386 processor operates at 2800 MHz, and has an i387 compatible floating point processor. Status of virtual processor 12 as of: 09/25/2019 00:15:07 on-line since 09/24/2019 23:59:05. The i386 processor operates at 2800 MHz, and has an i387 compatible floating point processor. Status of virtual processor 13 as of: 09/25/2019 00:15:07 on-line since 09/24/2019 23:59:05. The i386 processor operates at 2800 MHz, and has an i387 compatible floating point processor. Status of virtual processor 14 as of: 09/25/2019 00:15:07 on-line since 09/24/2019 23:59:05. The i386 processor operates at 2800 MHz, and has an i387 compatible floating point processor. Status of virtual processor 15 as of: 09/25/2019 00:15:07 on-line since 09/24/2019 23:59:05. The i386 processor operates at 2800 MHz, and has an i387 compatible floating point processor. Status of virtual processor 16 as of: 09/25/2019 00:15:07 on-line since 09/24/2019 23:59:05. The i386 processor operates at 2800 MHz, and has an i387 compatible floating point processor. Status of virtual processor 17 as of: 09/25/2019 00:15:07 on-line since 09/24/2019 23:59:05. The i386 processor operates at 2800 MHz, and has an i387 compatible floating point processor. Status of virtual processor 18 as of: 09/25/2019 00:15:07 on-line since 09/24/2019 23:59:05. The i386 processor operates at 2800 MHz, and has an i387 compatible floating point processor. Status of virtual processor 19 as of: 09/25/2019 00:15:07 on-line since 09/24/2019 23:59:05. The i386 processor operates at 2800 MHz, and has an i387 compatible floating point processor