Install required packages
Reading package lists... Done
Building dependency tree
Reading state information... Done
build-essential is already the newest version (12.1ubuntu2).
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
Download GCC sources
--2017-12-01 02:16:02--  ftp://ftp.fu-berlin.de/unix/languages/gcc/releases/gcc-7.1.0/gcc-7.1.0.tar.bz2
           => 'gcc-7.1.0.tar.bz2'
Resolving ftp.fu-berlin.de (ftp.fu-berlin.de)... 130.133.3.130
Connecting to ftp.fu-berlin.de (ftp.fu-berlin.de)|130.133.3.130|:21... connected.
Logging in as anonymous ... Logged in!
==> SYST ... done.    ==> PWD ... done.
==> TYPE I ... done.  ==> CWD (1) /unix/languages/gcc/releases/gcc-7.1.0 ... done.
==> SIZE gcc-7.1.0.tar.bz2 ... 84303533
==> PASV ... done.    ==> RETR gcc-7.1.0.tar.bz2 ... done.
Length: 84303533 (80M) (unauthoritative)

gcc-7.1.0.tar.bz2       100%[=============================>]  80.40M  4.27MB/s    in 22s

2017-12-01 02:16:28 (3.62 MB/s) - 'gcc-7.1.0.tar.bz2' saved [84303533]

Extract GCC sources
Download prerequisites
2017-12-01 02:16:47 URL: ftp://gcc.gnu.org/pub/gcc/infrastructure/gmp-6.1.0.tar.bz2 [2383840] -> "./gmp-6.1.0.tar.bz2" [1]
2017-12-01 02:16:50 URL: ftp://gcc.gnu.org/pub/gcc/infrastructure/mpfr-3.1.4.tar.bz2 [1279284] -> "./mpfr-3.1.4.tar.bz2" [1]
2017-12-01 02:16:54 URL: ftp://gcc.gnu.org/pub/gcc/infrastructure/mpc-1.0.3.tar.gz [669925] -> "./mpc-1.0.3.tar.gz" [1]
2017-12-01 02:16:57 URL: ftp://gcc.gnu.org/pub/gcc/infrastructure/isl-0.16.1.tar.bz2 [1626446] -> "./isl-0.16.1.tar.bz2" [1]
gmp-6.1.0.tar.bz2: OK
mpfr-3.1.4.tar.bz2: OK
mpc-1.0.3.tar.gz: OK
isl-0.16.1.tar.bz2: OK
All prerequisites downloaded successfully.
cat /proc/cpuinfo | grep -i -E "(model name|microcode)"
model name  : AMD Ryzen 7 1700 Eight-Core Processor
microcode   : 0x8001129
model name  : AMD Ryzen 7 1700 Eight-Core Processor
microcode   : 0x8001129
model name  : AMD Ryzen 7 1700 Eight-Core Processor
microcode   : 0x8001129
model name  : AMD Ryzen 7 1700 Eight-Core Processor
microcode   : 0x8001129
model name  : AMD Ryzen 7 1700 Eight-Core Processor
microcode   : 0x8001129
model name  : AMD Ryzen 7 1700 Eight-Core Processor
microcode   : 0x8001129
model name  : AMD Ryzen 7 1700 Eight-Core Processor
microcode   : 0x8001129
model name  : AMD Ryzen 7 1700 Eight-Core Processor
microcode   : 0x8001129
model name  : AMD Ryzen 7 1700 Eight-Core Processor
microcode   : 0x8001129
model name  : AMD Ryzen 7 1700 Eight-Core Processor
microcode   : 0x8001129
model name  : AMD Ryzen 7 1700 Eight-Core Processor
microcode   : 0x8001129
model name  : AMD Ryzen 7 1700 Eight-Core Processor
microcode   : 0x8001129
model name  : AMD Ryzen 7 1700 Eight-Core Processor
microcode   : 0x8001129
model name  : AMD Ryzen 7 1700 Eight-Core Processor
microcode   : 0x8001129
model name  : AMD Ryzen 7 1700 Eight-Core Processor
microcode   : 0x8001129
model name  : AMD Ryzen 7 1700 Eight-Core Processor
microcode   : 0x8001129
sudo dmidecode -t memory | grep -i -E "(rank|speed|part)" | grep -v -i unknown
    Speed: 2400 MHz
    Part Number: 9905625-074.A00G
    Rank: 2
    Configured Clock Speed: 1200 MHz
uname -a
Linux boomber-ryzen-r7-1700 4.10.0-40-generic #44~16.04.1-Ubuntu SMP Thu Nov 9 15:37:44 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux
cat /proc/sys/kernel/randomize_va_space
2
/ ~/ryzen-test
~/ryzen-test
Using 4 parallel processes
[KERN] -- Logs begin at Fri 2017-12-01 02:02:32 CST. --
[KERN] Dec 01 02:08:25 boomber-ryzen-r7-1700 kernel: raid6: avx2x4   gen() 16316 MB/s
[KERN] Dec 01 02:08:25 boomber-ryzen-r7-1700 kernel: raid6: avx2x4   xor()  9591 MB/s
[KERN] Dec 01 02:08:25 boomber-ryzen-r7-1700 kernel: raid6: using algorithm avx2x4 gen() 16316 MB/s
[KERN] Dec 01 02:08:25 boomber-ryzen-r7-1700 kernel: raid6: .... xor() 9591 MB/s, rmw enabled
[KERN] Dec 01 02:08:25 boomber-ryzen-r7-1700 kernel: raid6: using avx2x2 recovery algorithm
[KERN] Dec 01 02:08:25 boomber-ryzen-r7-1700 kernel: xor: automatically using best checksumming function   avx
[KERN] Dec 01 02:08:25 boomber-ryzen-r7-1700 kernel: Btrfs loaded, crc32c=crc32c-intel
[KERN] Dec 01 02:09:51 boomber-ryzen-r7-1700 kernel: zram: Cannot change disksize for initialized device
[KERN] Dec 01 02:13:52 boomber-ryzen-r7-1700 kernel: zram: Cannot change disksize for initialized device
[KERN] Dec 01 02:15:13 boomber-ryzen-r7-1700 kernel: zram: Cannot change disksize for initialized device
[loop-0] Fri Dec 1 02:16:58 CST 2017 start 0
[loop-1] Fri Dec 1 02:16:59 CST 2017 start 0
[loop-2] Fri Dec 1 02:17:00 CST 2017 start 0
[loop-3] Fri Dec 1 02:17:01 CST 2017 start 0
[KERN] Dec 01 02:17:02 boomber-ryzen-r7-1700 kernel: show_signal_msg: 13 callbacks suppressed
[KERN] Dec 01 02:17:02 boomber-ryzen-r7-1700 kernel: bash[31596]: segfault at 1b34b88 ip 000000000041d989 sp 00007fff151b2f68 error 6 in bash[400000+f4000]
[loop-1] Fri Dec 1 02:17:17 CST 2017 build failed
[loop-1] TIME TO FAIL: 19 s