Meizirkki
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October 19, 2014, 03:12:14 PM |
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Indeed, Avenger posted some epic ones (hint: there is more). If you want to squeeze more performance out of your RPi: 1) SSH to titan as root 2) edit file '/boot/config.txt' 3) add arm_freq=900 core_freq=450 sdram_freq=450 force_turbo=1
4) reboot 5) if you like, verify clock speed 'cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq' *note: max values were not stable, so I reduced them by 10% arm_freq=1000 core_freq=500 sdram_freq=500 OCing may corrupt the SD card very quickly. Be careful
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Prelude
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October 19, 2014, 06:30:21 PM Last edit: October 19, 2014, 06:44:44 PM by Prelude |
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Has OCing the pi shown any benefit for you? After a few minutes of looking at top, the highest usage I saw was ~87% of the pi's CPU across all processes. Doesn't seem to be a bottleneck. I do have 2 dead DC/DC, though.
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Prelude
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October 19, 2014, 06:57:32 PM |
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Ok, OCed mine a bit. arm_freq=900 core_freq=250 sdram_freq=400 force_turbo=1 Only OCed the CPU from 700MHz to 900MHz. I see no point OCing the GPU and RAM for this purpose. I'm guessing OCing the RAM especially could lead to issues with the SD card? Doesn't seem to have made much of a difference: Advanced tab does load a bit quicker, though.
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tolip_wen
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October 19, 2014, 08:12:34 PM |
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Disclaimer: I have no Titan but I do dabble with RPi on occasion. I have also been using Linux for over 20 years. Back in the days of expensive RAM, swap problems were on most peoples radar. I think the SD corruption is caused by 'swap' partition. Based on 2 screenshots, 2 days apart, by Prelude above, one 'might' determine... The miner has a slow RAM leak. I'd guess 6-8 days till it runs out of RAM (based on the tiny sample of 2 screenshots) If/when it runs out of RAM it starts using the swap partition for RAM storage. With a fast 'spinning platter' hard disk swapping RAM to disk destroys performance. With swap on an SD card expect worse performance. Using an SD for swap could be expected to kill the SD card also. IMneverHO If it were mine I would eliminate the swap partition and learn to live with available RAM. I'd consider it better that the miner just stop and reboot when RAM is exhausted. I doubt it would keep mining anyways because swap is too slow to use as RAM. At least it would restart without SD corruption. A class 10 SDcard might help but they were not designed for random access usage. YMMV
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Prelude
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October 19, 2014, 08:39:47 PM |
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Disclaimer: I have no Titan but I do dabble with RPi on occasion. I have also been using Linux for over 20 years. Back in the days of expensive RAM, swap problems were on most peoples radar. I think the SD corruption is caused by 'swap' partition. Based on 2 screenshots, 2 days apart, by Prelude above, one 'might' determine... The miner has a slow RAM leak. I'd guess 6-8 days till it runs out of RAM (based on the tiny sample of 2 screenshots) If/when it runs out of RAM it starts using the swap partition for RAM storage. With a fast 'spinning platter' hard disk swapping RAM to disk destroys performance. With swap on an SD card expect worse performance. Using an SD for swap could be expected to kill the SD card also. IMneverHO If it were mine I would eliminate the swap partition and learn to live with available RAM. I'd consider it better that the miner just stop and reboot when RAM is exhausted. I doubt it would keep mining anyways because swap is too slow to use as RAM. At least it would restart without SD corruption. A class 10 SDcard might help but they were not designed for random access usage. YMMV Very interesting. I'm using a faster than class 10 card (UHS-1), a SanDisk Extreme Pro 32GB. As a Linux noob, should I just reboot the Titan every ~5 days or so? Or should I attempt to figure out how to disable the swap partition?
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tolip_wen
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October 19, 2014, 11:43:25 PM |
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Very interesting. I'm using a faster than class 10 card (UHS-1), a SanDisk Extreme Pro 32GB. As a Linux noob, should I just reboot the Titan every ~5 days or so? Or should I attempt to figure out how to disable the swap partition?
I suggest keep an eye on 'top'. In particular the "KiB Mem:" line. Reboot before 'free' reaches zero. I made my observation on just 2 snapshots and noticed increased RAM usage. It might level off in which case there is a different cause of SD corruption. Next on the list is lack of resources. Any load level above 1.0 is sub optimal. Even OC'd there is a bottleneck. I would definately NOT always have a web page open on the miner. I'd consider not always having 'screen' running. I'd also only run 'top' when I was gonna look, it uses resources too. YMMV
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'twisted research and opinion' donations happily accepted @ 13362fxFAdrhagmCvSmFy4WoHrNRPG2V57 My sub 1337 vanity address
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s1gs3gv
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ex uno plures
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October 19, 2014, 11:46:27 PM |
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Any recent Titan shipments received ?
Anybody who paid on day 2 receive a Titan yet ?
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jelin1984
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October 19, 2014, 11:47:46 PM |
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I can not understand why so slow
With Jupiter they had ship all the batch 1 until one month And now why They do that
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bee7
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October 20, 2014, 02:10:56 AM |
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Disclaimer: I have no Titan but I do dabble with RPi on occasion. I have also been using Linux for over 20 years. Back in the days of expensive RAM, swap problems were on most peoples radar. I think the SD corruption is caused by 'swap' partition. Based on 2 screenshots, 2 days apart, by Prelude above, one 'might' determine... The miner has a slow RAM leak. I'd guess 6-8 days till it runs out of RAM (based on the tiny sample of 2 screenshots) If/when it runs out of RAM it starts using the swap partition for RAM storage. With a fast 'spinning platter' hard disk swapping RAM to disk destroys performance. With swap on an SD card expect worse performance. Using an SD for swap could be expected to kill the SD card also. IMneverHO If it were mine I would eliminate the swap partition and learn to live with available RAM. I'd consider it better that the miner just stop and reboot when RAM is exhausted. I doubt it would keep mining anyways because swap is too slow to use as RAM. At least it would restart without SD corruption. A class 10 SDcard might help but they were not designed for random access usage. YMMV Very interesting. I'm using a faster than class 10 card (UHS-1), a SanDisk Extreme Pro 32GB. As a Linux noob, should I just reboot the Titan every ~5 days or so? Or should I attempt to figure out how to disable the swap partition? The same disclaimer: I have no KNC products. You need not to reboot it every 5 days unless there is a memory leak so it stops to work or respond. Looking at the Top screenshot I see that there is a plenty of free RAM. Also, there is zero of swap space used. So I do not see the point to have a swap partition enabled at all. To disable swap partition open the /etc/fstab file and comment out the line that has 'swap' word in it by putting the sharp character ('#') at the beginning of the line, then save file and reboot. Should you have any issues with web interface or anything else due to exactly this tuning you may re-enable swap by removing the comment. Anyway, provided that swap is most likely not used the one thing that may actually kill the SD cards (apart from improper power off sequence) is a frequent writes the OS does to the file system when it accesses any file if the file system mounted with default options. By default the system updates last access time on each file it accesses (even for read only operation on a file). So each time when a new process is spawned its atime is updated. When any script is run by the cron job for example, all related files have their atime updated. To change that behavior you need to change the options used to mount the file system. In the same /etc/fstab file locate the lines related to the persistent file systems: /dev/mmcblk0p1 /boot vfat defaults,noatime,nodiratime 0 2 /dev/mmcblk0p2 / ext4 defaults,noatime,nodiratime 0 1
This is as I set it for my RPi that runs for more than a year inside bitfury based miner with the same SD card (a cheap one, I don't recall the brand). The place where this miner installed sometimes has power outages (once-twice a month) but even these events did not kill the SD in my miner. The tips are greatly appreciated if the thing above helps someone. 14NY8VQTaCSFBuY4Dnrchr5ayXFRr2Nu5p
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Dek52
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October 20, 2014, 12:41:36 PM |
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yes, YES! This picture fkn nails it!!!! Hey, what the hell you replying to this post you didn't buy this hunk of shit called a Titan. Furthermore, change your avatar, it makes me want to play with my chicken.
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GodFinans_Henrik
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October 20, 2014, 07:07:34 PM |
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Hi all, My name is Henrik Ask and I represent a debt collector in Sweden called God Finans (Good Finance in english). I just got a case from a client here in Sweden who had not got his refund on a Neptune and we helped him get his money back. As I understand it there are more people out there that have claims on KnC Miner. Please feel free to contact me and I will be glad to help you get your money back. You can contact me on henrik.ask@godfinans.nu
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coda
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October 20, 2014, 08:43:08 PM |
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i'll send you a email now ! people come on ! lets sue this assholes
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BTC:18oLLFcxwwzfQt4F2YF7QzKyFeksq3dqsQ
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xyzzy099
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October 20, 2014, 08:48:57 PM |
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i'll send you a email now ! people come on ! lets sue this assholes
I would advise caution sending personal/financial information to random people on the internet, even ones who claim to be Swedish lawyers...
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Libertarians: Diligently plotting to take over the world and leave you alone.
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coda
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October 20, 2014, 08:59:14 PM |
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i'll send you a email now ! people come on ! lets sue this assholes
I would advise caution sending personal/financial information to random people on the internet, even ones who claim to be Swedish lawyers... thank you for worrying for me i think it's legit http://www.godfinans.nu/en-GB
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BTC:18oLLFcxwwzfQt4F2YF7QzKyFeksq3dqsQ
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xyzzy099
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October 20, 2014, 09:04:08 PM |
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i'll send you a email now ! people come on ! lets sue this assholes
I would advise caution sending personal/financial information to random people on the internet, even ones who claim to be Swedish lawyers... thank you for worrying for me i think it's legit http://www.godfinans.nu/en-GByw, good luck.
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Libertarians: Diligently plotting to take over the world and leave you alone.
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dogie
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dogiecoin.com
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October 20, 2014, 10:12:38 PM |
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s1gs3gv
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ex uno plures
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October 20, 2014, 10:21:38 PM Last edit: October 20, 2014, 10:49:20 PM by s1gs3gv |
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Well that tosser Kurt banned me for asking difficult questions and making pointed observations about the Titan quality issues, reliability problems and KNC's inability to either fix the firmware or deliver a working product on schedule. He continues to delete inconvenient posts, calls customers liars, blames the pools, argues with customers after they are banned and unable to reply, refuses to give customers any information about shipping dates and generally carries on like the pissy little twink he is.
I think we need to start a KNC 'banned with pride' subchapter of bitcointalk
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kingscrown
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October 20, 2014, 11:06:04 PM |
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anybody from EU is tryign to do something?
i want refund too but we need european lawyer/company im in EU also.
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coda
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October 20, 2014, 11:34:35 PM |
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Hi all, My name is Henrik Ask and I represent a debt collector in Sweden called God Finans (Good Finance in english). I just got a case from a client here in Sweden who had not got his refund on a Neptune and we helped him get his money back. As I understand it there are more people out there that have claims on KnC Miner. Please feel free to contact me and I will be glad to help you get your money back. You can contact me on henrik.ask@godfinans.numaybe him ? http://se.linkedin.com/pub/henrik-ask/37/9ab/b4b
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BTC:18oLLFcxwwzfQt4F2YF7QzKyFeksq3dqsQ
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s1gs3gv
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ex uno plures
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October 20, 2014, 11:38:51 PM |
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Before you can successfully collect on a debt, you first need a legal judgement against KNC. This firm appears to be debt collectors, not lawyers.
At the moment, I don't think there are any outstanding legal claims.
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