archive snowblossom slack general
prev 2018-06-30 next
2018-06-30 01:17:11
Ninja
what
2018-06-30 11:07:18
孙熠
:grin:
2018-06-30 15:59:34
Fireduck
New miner code "works". At half the rate of the old one and produces nothing but invalid shares.
2018-06-30 15:59:51
Fireduck
So I guess rate is really 0% of the old one
2018-06-30 16:02:36
Shoots
lol good work duck
2018-06-30 16:04:32
Fireduck
Thanks
2018-06-30 16:05:53
Fireduck
Whatever asshole made this pow was not worried about ease of programming
2018-06-30 16:12:03
Shoots
didnt you suggest he may have been drunk?
2018-06-30 16:15:52
Fireduck
no no, the explorer was written by a drunk
2018-06-30 16:15:55
Fireduck
the pow just a jerk
2018-06-30 16:17:04
Shoots
what is the POW algo?
2018-06-30 16:18:46
Fireduck
6 passes of reading and hashing
2018-06-30 16:18:54
Clueless
spinning around 3 times really fast in your rolly chair.
2018-06-30 16:19:38
Fireduck
would have made it more but each pass has an associated proof in the block header
2018-06-30 16:19:44
Fireduck
and was trying to keep those reasonable
2018-06-30 16:21:38
Clueless
spinning too much makes you dizzy
2018-06-30 16:22:00
Fireduck
which is why 128-bit hashes in those proofs
2018-06-30 17:07:59
THX 1138 4EB
does GPT vs MBR for formatting a drive have any bearing on snowblossom performance?
2018-06-30 17:13:25
Fireduck
Amost certainly not
2018-06-30 19:01:22
Fireduck
woo! produces valid shares now
2018-06-30 19:09:09
Fireduck
ok, it is same speed when not involving ram
2018-06-30 19:09:52
Fireduck
wtf
2018-06-30 19:11:05
Fireduck
ram threads freaking out 24x7 problem tax cpu too much
2018-06-30 19:23:55
Fireduck
you know things have gone off the rails when you are typing Thread.yield() and hoping for better results
2018-06-30 19:24:11
THX 1138 4EB
i got a Plextor M8Pe 1TB Nvme M.2 and this adapter to put it in https://www.amazon.co.uk/Akasa-Internal-ak-pccm2p-01-M-2-Card-Interface-interface/dp/B01LZMIBVP but it hashes only 25 kh/s with CPU at 100% (i7 6700), 40, 60 or 80 threads
2018-06-30 19:24:31
THX 1138 4EB
I don't suppose there's a setting I could change that would yeild a better performance?
2018-06-30 19:24:33
Fireduck
fuck me, yield() is giving better results
2018-06-30 19:25:03
Fireduck
@THX 1138 4EB don't ask me, I've had terrible luck getting any sort of hardware to do what it should
2018-06-30 19:25:47
THX 1138 4EB
:disappointed:
2018-06-30 19:30:19
Fireduck
If the specs are correct, 85kh/s is the theoritical max for that drive
2018-06-30 19:34:20
THX 1138 4EB
how do you determine that?
2018-06-30 19:36:29
Fireduck
data rate (2000mb/s according to amazon)
2018-06-30 19:36:41
Fireduck
so 2000*1024*1024 / 4096 / 6 = hash rate per second
2018-06-30 19:37:02
Fireduck
4096 because it takes an entire 4k page to read a word
2018-06-30 19:37:08
Fireduck
and 6 passs per PoW
2018-06-30 19:42:29
THX 1138 4EB
i think this says the random read speed is 91 MB/s http://ssd.userbenchmark.com/SpeedTest/175630/PLEXTOR-PX-1TM8PeG which is so much less it must be a different value? UserBenchmark: Plextor M8Pe NVMe PCIe M.2 1TB PX-1TM8PeG
2018-06-30 19:42:51
Fireduck
91 MB/s is terrible
2018-06-30 19:43:49
THX 1138 4EB
well on user benchmarks it's one of the best scored for random read, losing only to intel optanes which top out at 176 MB/s
2018-06-30 19:44:00
Fireduck
if that were true, you'd only get 3.8kh/s
2018-06-30 19:44:33
Fireduck
I get 1800MB/s from a five year old intel nvme
2018-06-30 19:45:02
Fireduck
I don't know what sort of crack that site is smoking
2018-06-30 19:45:06
THX 1138 4EB
what is this data in the 4k read column?
2018-06-30 19:45:31
Fireduck
no idea
2018-06-30 19:45:39
Fireduck
but you can get 80MB/s from a decent hard drive
2018-06-30 19:45:47
Fireduck
not random, but whatever
2018-06-30 19:45:53
Fireduck
ssd doesn't have seek time
2018-06-30 19:46:15
Fireduck
unless they are doing something super stupid like read, wait for data, read next chunk, etc
2018-06-30 19:46:30
Fireduck
you need to parallelize to saturate ssd on random read
2018-06-30 19:46:42
Fireduck
That is the only way those numbers make any sense to me
2018-06-30 19:47:30
THX 1138 4EB
i see
2018-06-30 19:47:36
Fireduck
anyways, try cranking your threads way up
2018-06-30 19:47:40
Fireduck
like 200 or 500
2018-06-30 19:47:49
THX 1138 4EB
ok, wilco
2018-06-30 19:51:27
THX 1138 4EB
i know some people have said to wait two hours but in my experience it seems to level out pretty quickly (now at 24K with 200 threads and not going up any more; will try 500 threads soon)
2018-06-30 19:53:51
Fireduck
I'd say about 2 minutes gives you a good idea in this setup
2018-06-30 19:54:12
Fireduck
if you are using memfield or depending on cache hotness that is a different story
2018-06-30 19:54:19
Fireduck
but you aren't expecting any cache hits really
2018-06-30 20:02:21
THX 1138 4EB
oh ok
2018-06-30 20:14:17
THX 1138 4EB
alas, 500 is no better than 80 :disappointed:
2018-06-30 20:16:03
THX 1138 4EB
hopefully someone can advise what makes my system depend so much on CPU to get the IO from my drive. maybe something isn't implemented well (Asus Pro Gaming Z170 motherboard)
2018-06-30 20:16:16
Fireduck
What is the CPU?
2018-06-30 20:17:28
THX 1138 4EB
i7 6700
2018-06-30 20:18:16
Fireduck
quad core, 3.4 ghz?
2018-06-30 20:19:13
THX 1138 4EB
uhh, quad core for sure but i don't know what it's frequency is
2018-06-30 20:19:21
Fireduck
that's fine
2018-06-30 20:19:25
Fireduck
should be plenty
2018-06-30 20:19:27
THX 1138 4EB
there's only one 6700, right? it's not the K version
2018-06-30 23:19:54
Fireduck
if anyone wants a fun time, the new miner is testable
2018-06-30 23:20:12
Fireduck
in the jeanluc branch, called Arktika
2018-06-30 23:28:16
stoner19
1800MB/s?!
2018-06-30 23:32:22
AlexCrow
I tried, but can't run if anyone wants a fun time, the new miner is testable
2018-06-30 23:32:55
AlexCrow
can you share config example with new params?
2018-06-30 23:34:05
Fireduck
#snow_path_list=mem_4,/var/nvme_intel/snow/chunk #thread_list=16,256 snow_path_list=/var/nvme_intel/snow/chunk thread_list=64
2018-06-30 23:34:17
Fireduck
you give it a list of paths and threads for each location
2018-06-30 23:34:28
Fireduck
mem_#gb means load that many gb in ram
2018-06-30 23:34:40
Fireduck
also, you need the snow file broken in 1gb chunks
2018-06-30 23:34:47
AlexCrow
if I want only in memory ?
2018-06-30 23:35:11
Fireduck
it won't be faster
2018-06-30 23:35:39
AlexCrow
Sad