RFC: Simplfying hyperthreading distinctions

[Slawa Olhovchenkov]

On Sun, Mar 22, 2015 at 11:48:06AM -0700, Nathan Whitehorn wrote:

> 
> 
> On 03/22/15 11:43, Slawa Olhovchenkov wrote:
> > On Sun, Mar 22, 2015 at 10:44:51AM -0700, Adrian Chadd wrote:
> >
> >> ... or maybe the scheduler shouldn't be the primary source of the CPU
> >> topology information, but instead should be a consumer. :)
> > And may be good think unified API (userland also) for get full
> > topology (with PCIe, USB bus, USB HUB and other devices and IRQ
> > handlers).
> >
> > Currently for detect IRQ handlers of NIC I am need to parse
> > hw.intrnames with hacks for maping 't5nex0:0.1' to cxl0 and
> > 'ix1:que 2' to ix1.
> >
> 
> devinfo doesn't work for you?

devinfo also need hacks for map:

          pci130
            t5nex0
                Interrupt request lines:
                    0x120
                    0x121
                    0x122
                    0x123
                    0x124
                    0x125
                    0x126
                    0x127
                    0x128
                    0x129
                    0x12a
                    0x12b
                    0x12c
                    0x12d
                    0x12e
                    0x12f
                    0x130
                    0x131
                    0x132
                    0x133
                    0x134
                    0x135
                pcib11 memory window:
                    0xf9000000-0xf9ffffff
                    0xfa300000-0xfa37ffff
                    0xfac04000-0xfac05fff
              cxl0
              cxl1

devinfo don't show detailes about IRQ handelrs:
# vmstat -i
irq289: t5nex0:evt                    17          0
irq290: t5nex0:0.0          235629333426      39932
irq291: t5nex0:0.1          235835938497      39967
irq292: t5nex0:0.2          236414122597      40065
irq293: t5nex0:0.3          234357043791      39716
irq294: t5nex0:0.4          228105465543      38657
irq295: t5nex0:0.5          229347649630      38867
irq296: t5nex0:0.6          230949738393      39139
irq297: t5nex0:0.7          230484724411      39060
irq298: t5nex0:0,0                 78781          0
irq299: t5nex0:0,1                 90592          0

and not devinfo not vmstat don't provide information about relations
between CPU sockets and PCIe slots (cxl0 connect to PCIe handled
second socket).

Also, on other box:

# acpidump -dt
/*
  RSD PTR: OEM=ALASKA, ACPI_Rev=2.0x (2)
        XSDT=0x7f1e6080, length=36, cksum=95
 */
/*
  XSDT: Length=132, Revision=1, Checksum=106,
        OEMID=ALASKA, OEM Table ID=A M I, OEM Revision=0x1072009,
        Creator ID=AMI, Creator Revision=0x10013
Assertion failed: (addr != 0), function acpi_print_rsdt, file /usr/src/usr.sbin/acpi/acpidump/acpi.c, line 1097.
        Entries={ 0x7f1efe90, 0x7f1eff88, 0x7f1f0098, 0x7f1f00d8, 0x7f1f0448, 0x7f1f0478, 0x7f1f04b0, 0x7f1f0570, 0x7f1f05b0, 0x7f2606b8, 0x7f260708, Abort (core dumped)

And talk 'userland' I talk about API, from program, library call.
Utility for shell need too.