Bitcoin Forum

i been mining ethereum for a couple weeks.. no issues.. just using the standard -G -F and the url..
i switched to the NH software a few days ago.. it uses some proxy thing, but it was working..

today a few hours ago my mining stopped.. it says..


Allocating/mapping single buffer failed with: clCreateBuffer(-61) GPU cant allocate DAG in a single chunk, Bailing.

i thought it might be the NH software so i tried to go back to regular ethminer.. but nope same error..


nothing has changed on the pc.. its running windows 10..


i had the catalyst 15.11 drivers installed.. but i tried going to the new 16.3 hotfix drivers and same thing..


my gpus are 2 r9 270X. i was getting around 34Mh/s with them.

Use those before the ethminer

setx GPU_FORCE_64BIT_PTR 0
setx GPU_MAX_HEAP_SIZE 100
setx GPU_USE_SYNC_OBJECTS 1
setx GPU_MAX_ALLOC_PERCENT 100
setx GPU_SINGLE_ALLOC_PERCENT 100

ive already had a couple of these in the bat file.. but ill try them all and see..


edit..

nope same error.. :(

i dunno what changed today but yesterday it was working great.

I couldn't even start mining it.  Got the exact same error.  Tried everything I could find.  Started mining another coin to trade for eth.

setx GPU_SINGLE_ALLOC_PERCENT 100
set GPU_SINGLE_ALLOC_PERCENT = 100  

 :)

can you explain what they do? especially those first two, i know about the other, but never heard about those, can i still play games for example after setting this, without problem i mean

it didnt do anything for me.. same error.

don't get me wrong, my eth miner is working good, so i think the problem lie on your os installation, i think you can try with a formatting/secure erase, or if you can run it on a VM with gpu passthrough

i dont see how.. it literally ran up until a few hours ago and its been running for a couple weeks.
i didnt reboot or anything, it just stopped mining with that error.

ok 100% sure its not the computer..
i just tried my other computer.. this computer has 2 7970 gpus..


same error.. even tho i dont mine with that computer (it gets HOT) i have before and it ran just fine..


so something in the DAG changed today.. something my gpus dont like.

Hello,

can I mine with ANTMINER too?

Thx, Bisk

have you tried to recreate the dag file?

yeah i deleted it and it remade a new one.
its in %appdata%/local/ethash?

try adding --cl-extragpu-mem 0 to your command line. at some point it may require running the cards headless (no display).
my fork has this defaulted to 0 since 1.0.6

where do i download 1.0.6 for windows? i am using 1.0.3


edit that worked.. back in business.. thanks :)

ok so 0 isnt going to work, crash video driver.. i checked out what that does and it reserves gpu memory for windows? i am trying 16.. think i read it defaults 64? its MB?

its been running a few minutes at 16, no crashes yet.

Same issue here.

Got my 7870 running again with a bat file containing this:

setx GPU_SINGLE_ALLOC_PERCENT 100
set GPU_SINGLE_ALLOC_PERCENT = 100 
ethminer -G -F http://poolstuff.com --cl-extragpu-mem 0

/offtopic.
*me waves at genoil* :) (Hashrate is down from 15/16 to 10.5ish :S )

No those are only for sha256 algorithm coins like bitcoin.

I read that somewhere else from people with 2GB Pitcairns. Not sure if anything can be done about it.

I tried the --cl-global-work 16384  --cl-local-work 64 and it gives higher result. But changing the 64 to 128 has no effect. Anybody notice that?

It is same for me. I use the 7990, which is 2x7970 or 280x.

anyone having DAG alloc trouble with older cards, see here (https://bitcointalk.org/index.php?topic=1395481.msg15404098#msg15404098).