Bug#960150: marked as done (gdc-10 / libphobos 2.76 core.cpuid.{cores,threads}PerCPU() returns wrong value)
Your message dated Fri, 15 May 2020 15:33:41 +0000
with message-id <E1jZcLF-000DrS-9I@fasolo.debian.org>
and subject line Bug#960150: fixed in gcc-10 10.1.0-2
has caused the Debian Bug report #960150,
regarding gdc-10 / libphobos 2.76 core.cpuid.{cores,threads}PerCPU() returns wrong value
to be marked as done.
This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.
(NB: If you are a system administrator and have no idea what this
message is talking about, this may indicate a serious mail system
misconfiguration somewhere. Please contact owner@bugs.debian.org
immediately.)
--
960150: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=960150
Debian Bug Tracking System
Contact owner@bugs.debian.org with problems
--- Begin Message ---
Package: gdc-10
Version: 10.1.0-1
Severity: normal
Dear Maintainer,
====
import std.stdio;
import core.cpuid;
void main() {
writefln("CPU: threads_per_cpu=%d; cores_per_cpu=%d; ht=%s; processor=%s",
threadsPerCPU(), coresPerCPU(), hyperThreading(), processor());
}
====
# Using gdc-10 (10.1.0-1) and ligphobos1 (10.1.0-1)
CPU: threads_per_cpu=1; cores_per_cpu=32; ht=false; processor=AMD Ryzen Threadripper 2950X 16-Core Processor
# Using ldc (1:1.20.1-1) and libphobos2-ldc-shared-dev (= 1:1.20.1-1):
CPU: threads_per_cpu=32; cores_per_cpu=16; ht=true; processor=AMD Ryzen Threadripper 2950X 16-Core Processor
As can be seen gdc-10 (and gdc-9 too) returns wrong values.
I tried various optimization options, different -mcpu, static phobos
linking, etc. and they don't change it.
I am running on a bare hardware (no kvm, Xen or qemu involved) with
kernel Linux 5.2.17.
For reference:
$ lscpu
Architecture: x86_64
CPU op-mode(s): 32-bit, 64-bit
Byte Order: Little Endian
Address sizes: 43 bits physical, 48 bits virtual
CPU(s): 32
On-line CPU(s) list: 0-31
Thread(s) per core: 2
Core(s) per socket: 16
Socket(s): 1
NUMA node(s): 2
Vendor ID: AuthenticAMD
CPU family: 23
Model: 8
Model name: AMD Ryzen Threadripper 2950X 16-Core Processor
Stepping: 2
Frequency boost: enabled
CPU MHz: 2431.075
CPU max MHz: 3500.0000
CPU min MHz: 2200.0000
BogoMIPS: 6999.26
Virtualization: AMD-V
L1d cache: 512 KiB
L1i cache: 1 MiB
L2 cache: 8 MiB
L3 cache: 32 MiB
NUMA node0 CPU(s): 0-7,16-23
NUMA node1 CPU(s): 8-15,24-31
Vulnerability L1tf: Not affected
Vulnerability Mds: Not affected
Vulnerability Meltdown: Not affected
Vulnerability Spec store bypass: Mitigation; Speculative Store Bypass disabled via prctl and s
eccomp
Vulnerability Spectre v1: Mitigation; usercopy/swapgs barriers and __user pointer sanit
ization
Vulnerability Spectre v2: Mitigation; Full AMD retpoline, IBPB conditional, STIBP disab
led, RSB filling
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 fxs
r_opt pdpe1gb rdtscp lm constant_tsc rep_good nopl nonstop_ts
c cpuid 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 mi
salignsse 3dnowprefetch osvw skinit wdt tce topoext perfctr_c
ore perfctr_nb bpext perfctr_llc mwaitx cpb hw_pstate sme ssb
d sev ibpb vmmcall fsgsbase bmi1 avx2 smep bmi2 rdseed adx sm
ap clflushopt sha_ni xsaveopt xsavec xgetbv1 xsaves clzero ir
perf xsaveerptr arat npt lbrv svm_lock nrip_save tsc_scale vm
cb_clean flushbyasid decodeassists pausefilter pfthreshold av
ic v_vmsave_vmload vgif overflow_recov succor smca
$
$ numactl -s
policy: default
preferred node: current
physcpubind: 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
cpubind: 0 1
nodebind: 0 1
membind: 0 1
$
$ numactl --hardware
available: 2 nodes (0-1)
node 0 cpus: 0 1 2 3 4 5 6 7 16 17 18 19 20 21 22 23
node 0 size: 64371 MB
node 0 free: 15527 MB
node 1 cpus: 8 9 10 11 12 13 14 15 24 25 26 27 28 29 30 31
node 1 size: 64497 MB
node 1 free: 678 MB
node distances:
node 0 1
0: 10 16
1: 16 10
$
$ nproc
32
$
$ getconf -a | grep PROCESSORS
_NPROCESSORS_CONF 32
_NPROCESSORS_ONLN 32
$
$ cpuid
CPU 0:
vendor_id = "AuthenticAMD"
version information (1/eax):
processor type = primary processor (0)
family = 0xf (15)
model = 0x8 (8)
stepping id = 0x2 (2)
extended family = 0x8 (8)
extended model = 0x0 (0)
(family synth) = 0x17 (23)
(model synth) = 0x8 (8)
(simple synth) = AMD Ryzen (Pinnacle Ridge PiR-B2) [Zen+], 12nm
miscellaneous (1/ebx):
process local APIC physical ID = 0x0 (0)
cpu count = 0x20 (32) // <-----
CLFLUSH line size = 0x8 (8)
brand index = 0x0 (0)
brand id = 0x00 (0): unknown
feature information (1/edx):
...
hyper-threading / multi-core supported = true // <-----
...
feature information (1/ecx):
...
...
$
$ cpuid | grep ^CPU | wc -l
32
$
$ /proc/cpuinfo flags:
flags : ..... sse2 ht .....
$
Regards,
Witold
-- System Information:
Debian Release: bullseye/sid
APT prefers unstable-debug
APT policy: (500, 'unstable-debug'), (500, 'unstable'), (1, 'experimental-debug'), (1, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386
Kernel: Linux 5.2.0-3-amd64 (SMP w/32 CPU cores)
Kernel taint flags: TAINT_PROPRIETARY_MODULE, TAINT_OOT_MODULE, TAINT_UNSIGNED_MODULE
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled
Versions of packages gdc-10 depends on:
ii g++-10 10.1.0-1
ii gcc-10-base 10.1.0-1
ii libc6 2.30-7
ii libgmp10 2:6.2.0+dfsg-4
ii libgphobos-10-dev 10.1.0-1
ii libisl22 0.22.1-1
ii libmpc3 1.1.0-1
ii libmpfr6 4.0.2-1
ii libzstd1 1.4.4+dfsg-3
ii zlib1g 1:1.2.11.dfsg-2
gdc-10 recommends no packages.
gdc-10 suggests no packages.
-- no debconf information
--- End Message ---
--- Begin Message ---
Source: gcc-10
Source-Version: 10.1.0-2
Done: Matthias Klose <doko@debian.org>
We believe that the bug you reported is fixed in the latest version of
gcc-10, which is due to be installed in the Debian FTP archive.
A summary of the changes between this version and the previous one is
attached.
Thank you for reporting the bug, which will now be closed. If you
have further comments please address them to 960150@bugs.debian.org,
and the maintainer will reopen the bug report if appropriate.
Debian distribution maintenance software
pp.
Matthias Klose <doko@debian.org> (supplier of updated gcc-10 package)
(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing ftpmaster@ftp-master.debian.org)
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256
Format: 1.8
Date: Fri, 15 May 2020 17:11:03 +0200
Source: gcc-10
Architecture: source
Version: 10.1.0-2
Distribution: unstable
Urgency: medium
Maintainer: Debian GCC Maintainers <debian-gcc@lists.debian.org>
Changed-By: Matthias Klose <doko@debian.org>
Closes: 960150 960270
Changes:
gcc-10 (10.1.0-2) unstable; urgency=medium
.
* Update to git 20200515 from the gcc-10 branch.
- Fix PR ipa/94947, PR c/95040, PR middle-end/94724,
PR target/94950 (RISCV), PR target/94942 (x86), PR c/94968, PR c/94842,
PR c++/95003, PR c++/94885, PR c++/94938, PR c++/94951, PR c++/94907,
PR fortran/93497, PR fortran/94672, PR fortran/59107, PR libstdc++/94906,
PR libstdc++/94933, PR libstdc++/92894.
.
[ Matthias Klose ]
* Remove the unmaintained neon packaging bits.
* Add build dependency on unzip to fix libphobos test failures.
* libphobos: Fix issue 19861 - core.cpuid reports the wrong number of
threads. Closes: #960150.
* Build using GCC 10 on recent distro versions.
* Fix gnat tests to find the libgnat_utils shared library. Closes: #960270.
* Run the testsuite with the offload compilers installed into the temporary
install location.
* Don't require root for the temp installation of the offload compilers.
* Use LLVM 10 for the amdgcn assembler and linker tools.
* Don't override the libstdc++ test results when running the libstdc++ abi
check.
* Update debian/TODO, remove obsolete items, add some testsuite items.
* Override some lintian warnings for snapshot builds.
* Include jit test results into the summary and the gcc-test-results package.
* Fix some lintian warnings.
* Don't strip the target object files for the amdgcn offload build.
* Stop building the libgcc compat packages for bullseye/sid.
.
[ Nicolas Boulenguez ]
* Enable gnat autopkg tests.
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