Am 16.10.2017 um 22:10 schrieb H. Nikolaus Schaller hns@goldelico.com:
So I'll try to boot this board with 1400mV and compare memtester results...
And first result running at 1400mV:
memtester finds much less errors, but still finds a handful:
root@letux:~# time memtester 3GB memtester version 4.3.0 (32-bit) Copyright (C) 2001-2012 Charles Cazabon. Licensed under the GNU General Public License version 2 (only).
pagesize is 4096 pagesizemask is 0xfffff000 want 3072MB (3221225472 bytes) got 2924MB (3067002880 bytes), trying mlock ...locked. Loop 1: Stuck Address : ok Random Value : ok FAILURE: 0x045386f2 != 0x04538ef2 at offset 0x275d66e4. FAILURE: 0x0d62c28e != 0x0d62ca8e at offset 0x492a3a74. FAILURE: 0x8540ff8e != 0x8540fd8e at offset 0x590a2264. Compare XOR : FAILURE: 0x956f5821 != 0x956f5021 at offset 0x037e4cec. FAILURE: 0xb54d0fd6 != 0xb54d17d6 at offset 0x17188748. FAILURE: 0x067056fe != 0x067058fe at offset 0x22389510. FAILURE: 0x7514f621 != 0x7514fe21 at offset 0x26993130. FAILURE: 0xb460004a != 0xb460084a at offset 0x275d66e4. FAILURE: 0x3e0d66e0 != 0x3e0d68e0 at offset 0x2de10370. FAILURE: 0xb58d77e8 != 0xb58d75e8 at offset 0x39d676bc. FAILURE: 0xb28f5804 != 0xb28f5004 at offset 0x4744a844. FAILURE: 0x4f116fad != 0x4f1177ad at offset 0x488cc370. FAILURE: 0xbd6f3be6 != 0xbd6f43e6 at offset 0x492a3a74. Compare SUB : FAILURE: 0xbfba5fa9 != 0x940617a9 at offset 0x037e4cec. FAILURE: 0x55901711 != 0x55901f11 at offset 0x1654df40. FAILURE: 0x5ff81d86 != 0x8bac6586 at offset 0x17188748. FAILURE: 0x6f7d6484 != 0x43c91c84 at offset 0x20ff2eec. FAILURE: 0x8d6da1ee != 0x585ab3ee at offset 0x22389510. FAILURE: 0x094b77e8 != 0x3e5e65e8 at offset 0x26e0ec64. FAILURE: 0x3fb4439a != 0x6b688b9a at offset 0x275d66e4. FAILURE: 0x88f74de0 != 0x53e45fe0 at offset 0x2de10370. FAILURE: 0x050d2487 != 0xd958dc87 at offset 0x3148c864. FAILURE: 0xb8821b28 != 0xed950928 at offset 0x39d676bc. FAILURE: 0x71087241 != 0x77aad001 at offset 0x3a48243c. FAILURE: 0xa5c4b68b != 0xdad7a48b at offset 0x4078ee74. FAILURE: 0x58dbf224 != 0x2d27aa24 at offset 0x4744a844. FAILURE: 0x528f8195 != 0x7e43c995 at offset 0x488cc370. FAILURE: 0xd4e11216 != 0x00955a16 at offset 0x492a3a74. FAILURE: 0xdd8cf730 != 0xdd8cff30 at offset 0x5970fc70. Compare MUL : FAILURE: 0x00000000 != 0x00000001 at offset 0x17188748. FAILURE: 0x00000001 != 0x00000000 at offset 0x22389510. FAILURE: 0x00000001 != 0x00000000 at offset 0x2de10370. FAILURE: 0x00000000 != 0x00000001 at offset 0x3148c864. FAILURE: 0x00000001 != 0x00000002 at offset 0x39d676bc. FAILURE: 0x00000000 != 0x00000001 at offset 0x488cc370. FAILURE: 0x00000001 != 0x00000000 at offset 0x492a3a74. Compare DIV : Compare OR : ok Compare AND : ok Sequential Increment: ok Solid Bits : ok Block Sequential : ok Checkerboard : ok Bit Spread : testing 7FAILURE: 0xffffff7f != 0xfffffd7f at offset 0x0cfad484. FAILURE: 0xffffff7f != 0xfffffd7f at offset 0x1276a644. FAILURE: 0xffffff7f != 0xfffffd7f at offset 0x1478d6c4. FAILURE: 0xffffff7f != 0xfffffd7f at offset 0x3e760c84. FAILURE: 0xffffff7f != 0xfffffd7f at offset 0x4150a644. FAILURE: 0xffffff7f != 0xfffffd7f at offset 0x4150a64c. FAILURE: 0xffffff7f != 0xfffffd7f at offset 0x45c20244. Bit Flip : testing 73FAILURE: 0xffffffff != 0xfffffdff at offset 0x08003444. FAILURE: 0xffffffff != 0xfffffdff at offset 0x3848ea84. Walking Ones : ok Walking Zeroes : ok 8-bit Writes : |FAILURE: 0x7e5fdc46 != 0x7e5fde46 at offset 0x03a61608. 16-bit Writes : |FAILURE: 0xcfbddfc0 != 0xcfbdd7c0 at offset 0x36e96af4.
Loop 2: Stuck Address : testing 0FAILURE: possible bad address line at offset 0x8bfac804. Skipping to next test... Random Value : ^C^C
real 50m4.912s user 44m42.857s sys 2m26.869s root@letux:~#
So the critical thing is the fluctuation and less the absolute level (although it improves a little).
BR, Nikolaus