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Gh0str1d3r
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PostPosted: Sat Aug 25, 2018 2:09 pm    Post subject: hdparm on nvme ssd super slow (100 MB/s) Reply with quote

I just did a speed test on my nvme ssd (Samsung 951) and found the following numbers:

Code:
# hdparm -Tt --direct /dev/nvme0n1

/dev/nvme0n1:
 Timing O_DIRECT cached reads:   226 MB in  2.01 seconds = 112.61 MB/sec
 Timing O_DIRECT disk reads: 402 MB in  3.00 seconds = 134.00 MB/sec


I believe the speed should be at least a factor 10 larger. What could be the reason for this slow rate? The disk has been completely full recently, but now I made some space:

Code:
# df -hT
Filesystem     Type      Size  Used Avail Use% Mounted on
/dev/root      ext4      710G  582G   93G  87% /
devtmpfs       devtmpfs   10M     0   10M   0% /dev
tmpfs          tmpfs     1.6G  1.3M  1.6G   1% /run
cgroup_root    tmpfs      10M     0   10M   0% /sys/fs/cgroup
shm            tmpfs     7.8G  7.3M  7.8G   1% /dev/shm
none           tmpfs     7.8G   16K  7.8G   1% /run/user/1000


The computer was otherwise idle when I ran the test.

Thanks for any tips.
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Anon-E-moose
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PostPosted: Sat Aug 25, 2018 2:15 pm    Post subject: Reply with quote

That's a wide open question. Similar to "why is their air" :lol:

But there are many factors that could affect it.
Is it attached to an m.2 slot on the motherboard and is the slot nmve.
If using a pcie card, is it at least 4 lanes and in a 4 lane wide slot.

Did you test the speed when you first installed it?

Edit to add: that is a little slow, I have an 860 evo 256gb and get this
Code:
sudo hdparm -Tt --direct /dev/sda

/dev/sda:
 Timing O_DIRECT cached reads:   962 MB in  2.00 seconds = 480.92 MB/sec
 Timing O_DIRECT disk reads: 1462 MB in  3.00 seconds = 487.03 MB/sec

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NeddySeagoon
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PostPosted: Sat Aug 25, 2018 3:03 pm    Post subject: Reply with quote

Gh0str1d3r,

hdparm does not care about the filesystem. It reads sequential disk blocks.
Being full will compromise write speeds but have no effect on reads.

That both cached reads and disk reads are slow suggests a problem with the interface, since the drive can do better than that.
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Gh0str1d3r
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PostPosted: Sat Aug 25, 2018 3:40 pm    Post subject: Reply with quote

I have a Dell XPS 13 9350 laptop, in which this drive was natively installed (in an M.2 slot). On Windows, I get the following numbers:

Code:
-----------------------------------------------------------------------
CrystalDiskMark 6.0.1 x64 (UWP) (C) 2007-2018 hiyohiyo
                          Crystal Dew World : https://crystalmark.info/
-----------------------------------------------------------------------
* MB/s = 1,000,000 bytes/s [SATA/600 = 600,000,000 bytes/s]
* KB = 1000 bytes, KiB = 1024 bytes

   Sequential Read (Q= 32,T= 1) :  1644.301 MB/s
  Sequential Write (Q= 32,T= 1) :   293.704 MB/s
  Random Read 4KiB (Q=  8,T= 8) :   796.675 MB/s [ 194500.7 IOPS]
 Random Write 4KiB (Q=  8,T= 8) :   256.128 MB/s [  62531.3 IOPS]
  Random Read 4KiB (Q= 32,T= 1) :   285.299 MB/s [  69653.1 IOPS]
 Random Write 4KiB (Q= 32,T= 1) :   208.318 MB/s [  50858.9 IOPS]
  Random Read 4KiB (Q=  1,T= 1) :    31.103 MB/s [   7593.5 IOPS]
 Random Write 4KiB (Q=  1,T= 1) :    99.599 MB/s [  24316.2 IOPS]

  Test : 1024 MiB [D: 13.9% (7.0/50.0 GiB)] (x5)  [Interval=5 sec]
  Date : 2018/08/25 9:53:38
    OS : Windows 10  [10.0 Build 17134] (x64)
 


Even though some of the speeds are also not super fast, at least the sequential read is 10x faster than with Linux, indicating a Linux-specific problem. What could cause this?
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Anon-E-moose
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PostPosted: Sat Aug 25, 2018 4:04 pm    Post subject: Reply with quote

From the man page:

hdparm provides a command line interface to various kernel interfaces supported by the Linux SATA/PATA/SAS "libata" subsystem and the older IDE driver subsystem.

So the question now is, are you using the nvme drivers?
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Gh0str1d3r
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PostPosted: Sat Aug 25, 2018 4:16 pm    Post subject: Reply with quote

Anon-E-moose wrote:
From the man page:

hdparm provides a command line interface to various kernel interfaces supported by the Linux SATA/PATA/SAS "libata" subsystem and the older IDE driver subsystem.

So the question now is, are you using the nvme drivers?


How can I find this out? The drivers are compiled into the kernel:

Code:
# grep "NVME" /usr/src/linux/.config
# NVME Support
CONFIG_NVME_CORE=y
CONFIG_BLK_DEV_NVME=y
# CONFIG_NVME_MULTIPATH is not set
# CONFIG_NVME_FC is not set
# CONFIG_NVME_TARGET is not set
CONFIG_RTC_NVMEM=y
CONFIG_NVMEM=y
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PostPosted: Sat Aug 25, 2018 4:21 pm    Post subject: Reply with quote

what does "dmesg |grep -i nvme" show
And "lspci -nnk"
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Gh0str1d3r
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PostPosted: Sat Aug 25, 2018 4:22 pm    Post subject: Reply with quote

Anon-E-moose wrote:
what does "dmesg |grep -i nvme" show
And "lspci -nnk"


Code:

# dmesg |grep -i nvme
[    0.000000] Kernel command line: root=/dev/nvme0n1p6
[    0.352454] nvme nvme0: pci function 0000:3c:00.0
[    0.461126]  nvme0n1: p1 p2 p3 p4 p5 p6
[    1.521327] EXT4-fs (nvme0n1p6): mounted filesystem with ordered data mode. Opts: (null)
[    3.354839] EXT4-fs (nvme0n1p6): re-mounted. Opts: (null)
[    3.431702] Adding 33554428k swap on /dev/nvme0n1p5.  Priority:-2 extents:1 across:33554428k SS



Code:
# lspci -nnk
00:00.0 Host bridge [0600]: Intel Corporation Xeon E3-1200 v5/E3-1500 v5/6th Gen Core Processor Host Bridge/DRAM Registers [8086:1904] (rev 08)
        Subsystem: Dell Xeon E3-1200 v5/E3-1500 v5/6th Gen Core Processor Host Bridge/DRAM Registers [1028:0704]
        Kernel driver in use: skl_uncore
00:02.0 VGA compatible controller [0300]: Intel Corporation Skylake GT2 [HD Graphics 520] [8086:1916] (rev 07)
        DeviceName:  Onboard IGD
        Subsystem: Dell Skylake GT2 [HD Graphics 520] [1028:0704]
        Kernel driver in use: i915
00:04.0 Signal processing controller [1180]: Intel Corporation Xeon E3-1200 v5/E3-1500 v5/6th Gen Core Processor Thermal Subsystem [8086:1903] (rev 08)
        Subsystem: Dell Xeon E3-1200 v5/E3-1500 v5/6th Gen Core Processor Thermal Subsystem [1028:0704]
00:14.0 USB controller [0c03]: Intel Corporation Sunrise Point-LP USB 3.0 xHCI Controller [8086:9d2f] (rev 21)
        Subsystem: Dell Sunrise Point-LP USB 3.0 xHCI Controller [1028:0704]
        Kernel driver in use: xhci_hcd
        Kernel modules: xhci_pci
00:14.2 Signal processing controller [1180]: Intel Corporation Sunrise Point-LP Thermal subsystem [8086:9d31] (rev 21)
        Subsystem: Dell Sunrise Point-LP Thermal subsystem [1028:0704]
00:15.0 Signal processing controller [1180]: Intel Corporation Sunrise Point-LP Serial IO I2C Controller #0 [8086:9d60] (rev 21)
        Subsystem: Dell Sunrise Point-LP Serial IO I2C Controller [1028:0704]
00:15.1 Signal processing controller [1180]: Intel Corporation Sunrise Point-LP Serial IO I2C Controller #1 [8086:9d61] (rev 21)
        Subsystem: Dell Sunrise Point-LP Serial IO I2C Controller [1028:0704]
00:16.0 Communication controller [0780]: Intel Corporation Sunrise Point-LP CSME HECI #1 [8086:9d3a] (rev 21)
        Subsystem: Dell Sunrise Point-LP CSME HECI [1028:0704]
00:17.0 SATA controller [0106]: Intel Corporation Sunrise Point-LP SATA Controller [AHCI mode] [8086:9d03] (rev 21)
        Subsystem: Dell Sunrise Point-LP SATA Controller [AHCI mode] [1028:0704]
        Kernel driver in use: ahci
        Kernel modules: ahci
00:1c.0 PCI bridge [0604]: Intel Corporation Sunrise Point-LP PCI Express Root Port #1 [8086:9d10] (rev f1)
        Kernel driver in use: pcieport
00:1c.4 PCI bridge [0604]: Intel Corporation Sunrise Point-LP PCI Express Root Port #5 [8086:9d14] (rev f1)
        Kernel driver in use: pcieport
00:1c.5 PCI bridge [0604]: Intel Corporation Sunrise Point-LP PCI Express Root Port #6 [8086:9d15] (rev f1)
        Kernel driver in use: pcieport
00:1d.0 PCI bridge [0604]: Intel Corporation Sunrise Point-LP PCI Express Root Port #9 [8086:9d18] (rev f1)
        Kernel driver in use: pcieport
00:1f.0 ISA bridge [0601]: Intel Corporation Sunrise Point-LP LPC Controller [8086:9d48] (rev 21)
        Subsystem: Dell Sunrise Point-LP LPC Controller [1028:0704]
00:1f.2 Memory controller [0580]: Intel Corporation Sunrise Point-LP PMC [8086:9d21] (rev 21)
        Subsystem: Dell Sunrise Point-LP PMC [1028:0704]
00:1f.3 Audio device [0403]: Intel Corporation Sunrise Point-LP HD Audio [8086:9d70] (rev 21)
        Subsystem: Dell Sunrise Point-LP HD Audio [1028:0704]
        Kernel driver in use: snd_hda_intel
        Kernel modules: snd_hda_intel
00:1f.4 SMBus [0c05]: Intel Corporation Sunrise Point-LP SMBus [8086:9d23] (rev 21)
        Subsystem: Dell Sunrise Point-LP SMBus [1028:0704]
        Kernel driver in use: i801_smbus
        Kernel modules: i2c_i801
3a:00.0 Network controller [0280]: Intel Corporation Wireless 7265 [8086:095a] (rev 59)
        Subsystem: Intel Corporation Dual Band Wireless-AC 7265 [8086:5010]
        Kernel driver in use: iwlwifi
        Kernel modules: iwlwifi
3b:00.0 Unassigned class [ff00]: Realtek Semiconductor Co., Ltd. RTS525A PCI Express Card Reader [10ec:525a] (rev 01)
        Subsystem: Dell RTS525A PCI Express Card Reader [1028:0704]
        Kernel driver in use: rtsx_pci
        Kernel modules: rtsx_pci
3c:00.0 Non-Volatile memory controller [0108]: Samsung Electronics Co Ltd NVMe SSD Controller SM951/PM951 [144d:a802] (rev 01)
        Subsystem: Samsung Electronics Co Ltd NVMe SSD Controller SM951/PM951 [144d:a801]
        Kernel driver in use: nvme
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Anon-E-moose
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PostPosted: Sat Aug 25, 2018 4:29 pm    Post subject: Reply with quote

Code:
3c:00.0 Non-Volatile memory controller [0108]: Samsung Electronics Co Ltd NVMe SSD Controller SM951/PM951 [144d:a802] (rev 01)
        Subsystem: Samsung Electronics Co Ltd NVMe SSD Controller SM951/PM951 [144d:a801]
        Kernel driver in use: nvme


This says you're using the kernel module. But I don't know much beyond that as I don't have an nvme drive.

Which kernel are you using?

And there are a couple of other nvme things to select in the device area, but again I'm not sure what they do.
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Anon-E-moose
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PostPosted: Sat Aug 25, 2018 4:32 pm    Post subject: Reply with quote

https://wiki.archlinux.org/index.php/Solid_state_drive/NVMe though not much info there

https://wiki.gentoo.org/wiki/NVMe same for this one
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Gh0str1d3r
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PostPosted: Sat Aug 25, 2018 4:43 pm    Post subject: Reply with quote

Anon-E-moose wrote:
Code:
3c:00.0 Non-Volatile memory controller [0108]: Samsung Electronics Co Ltd NVMe SSD Controller SM951/PM951 [144d:a802] (rev 01)
        Subsystem: Samsung Electronics Co Ltd NVMe SSD Controller SM951/PM951 [144d:a801]
        Kernel driver in use: nvme


This says you're using the kernel module. But I don't know much beyond that as I don't have an nvme drive.

Which kernel are you using?

And there are a couple of other nvme things to select in the device area, but again I'm not sure what they do.


Quote:
https://wiki.archlinux.org/index.php/Solid_state_drive/NVMe though not much info there

https://wiki.gentoo.org/wiki/NVMe same for this one


I'm using kernel 4.17.4. I followed the little advice given on the web pages you cited, but things look okay afaik.

Code:
# nvme get-feature -f 0x0c -H /dev/nvme0
get-feature:0xc (Autonomous Power State Transition), Current value:0x000001
        Autonomous Power State Transition Enable (APSTE): Enabled
        Auto PST Entries        .................
        Entry[ 0]   
        .................
        Idle Time Prior to Transition (ITPT): 275 ms
        Idle Transition Power State   (ITPS): 3
        .................
        Entry[ 1]   
        .................
        Idle Time Prior to Transition (ITPT): 275 ms
        Idle Transition Power State   (ITPS): 3
        .................
        Entry[ 2]   
        .................
        Idle Time Prior to Transition (ITPT): 275 ms
        Idle Transition Power State   (ITPS): 3
        .................
        Entry[ 3]   
        .................
        Idle Time Prior to Transition (ITPT): 1200 ms
        Idle Transition Power State   (ITPS): 4
        .................
        Entry[ 4]   
        .................
        Idle Time Prior to Transition (ITPT): 0 ms
        Idle Transition Power State   (ITPS): 0
        .................
        Entry[ 5]   
        .................
        Idle Time Prior to Transition (ITPT): 0 ms
        Idle Transition Power State   (ITPS): 0
        .................
        Entry[ 6]   
        .................
        Idle Time Prior to Transition (ITPT): 0 ms
        Idle Transition Power State   (ITPS): 0
        .................
        Entry[ 7]   
        .................
        Idle Time Prior to Transition (ITPT): 0 ms
        Idle Transition Power State   (ITPS): 0
        .................
        Entry[ 8]   
        .................
        Idle Time Prior to Transition (ITPT): 0 ms
        Idle Transition Power State   (ITPS): 0
        .................
        Entry[ 9]   
        .................
        Idle Time Prior to Transition (ITPT): 0 ms
        Idle Transition Power State   (ITPS): 0
        .................
        Entry[10]   
        .................
        Idle Time Prior to Transition (ITPT): 0 ms
        Idle Transition Power State   (ITPS): 0
        .................
        Entry[11]   
        .................
        Idle Time Prior to Transition (ITPT): 0 ms
        Idle Transition Power State   (ITPS): 0
        .................
        Entry[12]   
        .................
        Idle Time Prior to Transition (ITPT): 0 ms
        Idle Transition Power State   (ITPS): 0
        .................
        Entry[13]   
        .................
        Idle Time Prior to Transition (ITPT): 0 ms
        Idle Transition Power State   (ITPS): 0
        .................
        Entry[14]   
        .................
        Idle Time Prior to Transition (ITPT): 0 ms
        Idle Transition Power State   (ITPS): 0
        .................
        Entry[15]   
        .................
        Idle Time Prior to Transition (ITPT): 0 ms
        Idle Transition Power State   (ITPS): 0
        .................
        Entry[16]   
        .................
        Idle Time Prior to Transition (ITPT): 0 ms
        Idle Transition Power State   (ITPS): 0
        .................
        Entry[17]   
        .................
        Idle Time Prior to Transition (ITPT): 0 ms
        Idle Transition Power State   (ITPS): 0
        .................
        Entry[18]   
        .................
        Idle Time Prior to Transition (ITPT): 0 ms
        Idle Transition Power State   (ITPS): 0
        .................
        Entry[19]   
        .................
        Idle Time Prior to Transition (ITPT): 0 ms
        Idle Transition Power State   (ITPS): 0
        .................
        Entry[20]   
        .................
        Idle Time Prior to Transition (ITPT): 0 ms
        Idle Transition Power State   (ITPS): 0
        .................
        Entry[21]   
        .................
        Idle Time Prior to Transition (ITPT): 0 ms
        Idle Transition Power State   (ITPS): 0
        .................
        Entry[22]   
        .................
        Idle Time Prior to Transition (ITPT): 0 ms
        Idle Transition Power State   (ITPS): 0
        .................
        Entry[23]   
        .................
        Idle Time Prior to Transition (ITPT): 0 ms
        Idle Transition Power State   (ITPS): 0
        .................
        Entry[24]   
        .................
        Idle Time Prior to Transition (ITPT): 0 ms
        Idle Transition Power State   (ITPS): 0
        .................
        Entry[25]   
        .................
        Idle Time Prior to Transition (ITPT): 0 ms
        Idle Transition Power State   (ITPS): 0
        .................
        Entry[26]   
        .................
        Idle Time Prior to Transition (ITPT): 0 ms
        Idle Transition Power State   (ITPS): 0
        .................
        Entry[27]   
        .................
        Idle Time Prior to Transition (ITPT): 0 ms
        Idle Transition Power State   (ITPS): 0
        .................
        Entry[28]   
        .................
        Idle Time Prior to Transition (ITPT): 0 ms
        Idle Transition Power State   (ITPS): 0
        .................
        Entry[29]   
        .................
        Idle Time Prior to Transition (ITPT): 0 ms
        Idle Transition Power State   (ITPS): 0
        .................
        Entry[30]   
        .................
        Idle Time Prior to Transition (ITPT): 0 ms
        Idle Transition Power State   (ITPS): 0
        .................
        Entry[31]   
        .................
        Idle Time Prior to Transition (ITPT): 0 ms
        Idle Transition Power State   (ITPS): 0
        .................
       0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f
0000: 18 13 01 00 00 00 00 00 18 13 01 00 00 00 00 00 "................"
0010: 18 13 01 00 00 00 00 00 20 b0 04 00 00 00 00 00 "................"
0020: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 "................"
0030: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 "................"
0040: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 "................"
0050: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 "................"
0060: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 "................"
0070: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 "................"
0080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 "................"
0090: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 "................"
00a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 "................"
00b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 "................"
00c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 "................"
00d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 "................"
00e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 "................"
00f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 "................"
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PostPosted: Sat Aug 25, 2018 4:48 pm    Post subject: Reply with quote

Maybe someone else with some real nvme experience will weigh in.
I've been thinking about getting an nvme drive, but I'd have to go with a pcie type interface, and truly the ssd/sata is fast enough at least for now.

Sorry I can't help more than this and hope you find some answers.
If it even sped up by twice or three times, you'd notice an improvement.
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NeddySeagoon
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PostPosted: Sat Aug 25, 2018 4:49 pm    Post subject: Reply with quote

Gh0str1d3r,

Hmm Sunrisepoint hardware and devices with no drivers ...
Code:
00:14.2 Signal processing controller [1180]: Intel Corporation Sunrise Point-LP Thermal subsystem [8086:9d31] (rev 21)
        Subsystem: Dell Sunrise Point-LP Thermal subsystem [1028:0704]
00:15.0 Signal processing controller [1180]: Intel Corporation Sunrise Point-LP Serial IO I2C Controller #0 [8086:9d60] (rev 21)
        Subsystem: Dell Sunrise Point-LP Serial IO I2C Controller [1028:0704]
00:15.1 Signal processing controller [1180]: Intel Corporation Sunrise Point-LP Serial IO I2C Controller #1 [8086:9d61] (rev 21)
        Subsystem: Dell Sunrise Point-LP Serial IO I2C Controller [1028:0704]
00:16.0 Communication controller [0780]: Intel Corporation Sunrise Point-LP CSME HECI #1 [8086:9d3a] (rev 21)
        Subsystem: Dell Sunrise Point-LP CSME HECI [1028:0704]


Please put your entire kernel .config file onto a pastebin site.
Sunrise Point has some of its very own drivers.
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Computer users fall into two groups:-
those that do backups
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Anon-E-moose
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PostPosted: Sat Aug 25, 2018 4:51 pm    Post subject: Reply with quote

One more link that might have some pointers https://askubuntu.com/questions/698395/poor-io-performance-pcie-nvme-samsung-950-pro
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Gh0str1d3r
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PostPosted: Sat Aug 25, 2018 5:00 pm    Post subject: Reply with quote

NeddySeagoon wrote:
Gh0str1d3r,

Hmm Sunrisepoint hardware and devices with no drivers ...
Code:
00:14.2 Signal processing controller [1180]: Intel Corporation Sunrise Point-LP Thermal subsystem [8086:9d31] (rev 21)
        Subsystem: Dell Sunrise Point-LP Thermal subsystem [1028:0704]
00:15.0 Signal processing controller [1180]: Intel Corporation Sunrise Point-LP Serial IO I2C Controller #0 [8086:9d60] (rev 21)
        Subsystem: Dell Sunrise Point-LP Serial IO I2C Controller [1028:0704]
00:15.1 Signal processing controller [1180]: Intel Corporation Sunrise Point-LP Serial IO I2C Controller #1 [8086:9d61] (rev 21)
        Subsystem: Dell Sunrise Point-LP Serial IO I2C Controller [1028:0704]
00:16.0 Communication controller [0780]: Intel Corporation Sunrise Point-LP CSME HECI #1 [8086:9d3a] (rev 21)
        Subsystem: Dell Sunrise Point-LP CSME HECI [1028:0704]


Please put your entire kernel .config file onto a pastebin site.
Sunrise Point has some of its very own drivers.


https://pastebin.com/0MJKp49L

Anon-E-moose, thanks for your help so far! Indeed, the GB/s speeds are rarely necessary, which is why I didn't notice the slow speed up to now (I was thinking of buying a 2TB Samsung 860 EVO, which is supposedly slower than my current drive, so I wanted to know what the actual speed is. If I can get high speeds I might instead go for the new 970 EVO.
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PostPosted: Sat Aug 25, 2018 5:12 pm    Post subject: Reply with quote

drivers for sunrise should be

intel_pch_thermal
intel-lpss
mei_me

(similar enough to the acer ones on my system, I think those work for the intel sunrise stuff)
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apiaio
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PostPosted: Sat Aug 25, 2018 6:38 pm    Post subject: Reply with quote

Do I have the same problem?
Code:
miropc miro # hdparm -Tt --direct /dev/sda                                                                               
                                                                                                                                   
/dev/sda:                                                                                                                           
 Timing O_DIRECT cached reads:   598 MB in  2.00 seconds = 299.01 MB/sec
 Timing O_DIRECT disk reads: 566 MB in  3.00 seconds = 188.48 MB/sec
miropc miro # hdparm -Tt --direct /dev/sdb

/dev/sdb:
 Timing O_DIRECT cached reads:   998 MB in  2.00 seconds = 498.37 MB/sec
 Timing O_DIRECT disk reads: 398 MB in  3.01 seconds = 132.19 MB/sec
miropc miro #
sda is sdd and sdb is rotational hard disk drive.
Code:
miropc miro # lspci -nnk
...
00:17.0 SATA controller [0106]: Intel Corporation Sunrise Point-H SATA controller [AHCI mode] [8086:a102] (rev 31)
        Subsystem: ASUSTeK Computer Inc. Sunrise Point-H SATA controller [AHCI mode] [1043:8694]
        Kernel driver in use: ahci
...

Should I enable sunrise drivers too?
Thanks
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Gh0str1d3r
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PostPosted: Sat Aug 25, 2018 9:49 pm    Post subject: Reply with quote

Anon-E-moose wrote:
drivers for sunrise should be

intel_pch_thermal
intel-lpss
mei_me

(similar enough to the acer ones on my system, I think those work for the intel sunrise stuff)


I compiled the new 4.18.3 kernel with these options, but still no improvement. The new kernel config is here:

https://pastebin.com/KqebdH8n
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russK
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PostPosted: Sun Aug 26, 2018 8:01 am    Post subject: Reply with quote

I have a Samsung 951 and it is indeed more than a factor of 10 faster than what you are seeing:
Code:
hdparm -Tt --direct /dev/nvme0n1

/dev/nvme0n1:
 Timing O_DIRECT cached reads:   3300 MB in  2.00 seconds = 1650.48 MB/sec
 Timing O_DIRECT disk reads: 6308 MB in  3.00 seconds = 2102.38 MB/sec

I don't recall doing anything special to get these speeds which may be typical speeds.
I compared our kernel .config files and they are substantially different. One thing that stood out to me though was this in your .config:
Code:
CONFIG_BLK_DEV_THROTTLING=y

I'm not familiar with this setting. Are you using this feature? If not, maybe try turning it off.

russK
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PostPosted: Sun Aug 26, 2018 10:48 am    Post subject: Reply with quote

Never noticed the throttling parm, but I wouldn't turn it on

Code:
config BLK_DEV_THROTTLING
    bool "Block layer bio throttling support"
    depends on BLK_CGROUP=y
    default n
    ---help---
    Block layer bio throttling support. It can be used to limit
    the IO rate to a device. IO rate policies are per cgroup and
    one needs to mount and use blkio cgroup controller for creating
    cgroups and specifying per device IO rate policies.

    See Documentation/cgroups/blkio-controller.txt for more information.

config BLK_DEV_THROTTLING_LOW
    bool "Block throttling .low limit interface support (EXPERIMENTAL)"
    depends on BLK_DEV_THROTTLING
    default n
    ---help---
    Add .low limit interface for block throttling. The low limit is a best
    effort limit to prioritize cgroups. Depending on the setting, the limit
    can be used to protect cgroups in terms of bandwidth/iops and better
    utilize disk resource.

    Note, this is an experimental interface and could be changed someday.


It does say it needs cgroup and controller, but I wouldn't have it installed anyway.
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Gh0str1d3r
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PostPosted: Sun Aug 26, 2018 11:24 pm    Post subject: Reply with quote

russK wrote:
I have a Samsung 951 and it is indeed more than a factor of 10 faster than what you are seeing:
Code:
hdparm -Tt --direct /dev/nvme0n1

/dev/nvme0n1:
 Timing O_DIRECT cached reads:   3300 MB in  2.00 seconds = 1650.48 MB/sec
 Timing O_DIRECT disk reads: 6308 MB in  3.00 seconds = 2102.38 MB/sec

I don't recall doing anything special to get these speeds which may be typical speeds.
I compared our kernel .config files and they are substantially different. One thing that stood out to me though was this in your .config:
Code:
CONFIG_BLK_DEV_THROTTLING=y

I'm not familiar with this setting. Are you using this feature? If not, maybe try turning it off.

russK


I disabled this feature, disabled X86_INTEL_LPSS and also changed the the other new features to modules:

CONFIG_MFD_INTEL_LPSS=m
CONFIG_MFD_INTEL_LPSS_ACPI=m
CONFIG_MFD_INTEL_LPSS_PCI=m
CONFIG_INTEL_PCH_THERMAL=m
CONFIG_INTEL_MEI_ME=m

The changes were made because the kernel with compiled-in features was very unstable (frequently freezing and definitely crashing on every attempt to suspend).

Unfortunately, the access speed to the NVME has not changed by any of this.

russK, what type of computer do you have? Would you mind sharing your .config and your lspci -nnk?

Here is my current version:

https://pastebin.com/smRCgNNx

and my updated lspci:

Code:
# lspci -nnk
00:00.0 Host bridge [0600]: Intel Corporation Xeon E3-1200 v5/E3-1500 v5/6th Gen Core Processor Host Bridge/DRAM Registers [8086:1904] (rev 08)
        Subsystem: Dell Xeon E3-1200 v5/E3-1500 v5/6th Gen Core Processor Host Bridge/DRAM Registers [1028:0704]
        Kernel driver in use: skl_uncore
00:02.0 VGA compatible controller [0300]: Intel Corporation Skylake GT2 [HD Graphics 520] [8086:1916] (rev 07)
        DeviceName:  Onboard IGD
        Subsystem: Dell Skylake GT2 [HD Graphics 520] [1028:0704]
        Kernel driver in use: i915
00:04.0 Signal processing controller [1180]: Intel Corporation Xeon E3-1200 v5/E3-1500 v5/6th Gen Core Processor Thermal Subsystem [8086:1903] (rev 08)
        Subsystem: Dell Xeon E3-1200 v5/E3-1500 v5/6th Gen Core Processor Thermal Subsystem [1028:0704]
00:14.0 USB controller [0c03]: Intel Corporation Sunrise Point-LP USB 3.0 xHCI Controller [8086:9d2f] (rev 21)
        Subsystem: Dell Sunrise Point-LP USB 3.0 xHCI Controller [1028:0704]
        Kernel driver in use: xhci_hcd
        Kernel modules: xhci_pci
00:14.2 Signal processing controller [1180]: Intel Corporation Sunrise Point-LP Thermal subsystem [8086:9d31] (rev 21)
        Subsystem: Dell Sunrise Point-LP Thermal subsystem [1028:0704]
        Kernel driver in use: intel_pch_thermal
        Kernel modules: intel_pch_thermal
00:15.0 Signal processing controller [1180]: Intel Corporation Sunrise Point-LP Serial IO I2C Controller #0 [8086:9d60] (rev 21)
        Subsystem: Dell Sunrise Point-LP Serial IO I2C Controller [1028:0704]
        Kernel driver in use: intel-lpss
        Kernel modules: intel_lpss_pci
00:15.1 Signal processing controller [1180]: Intel Corporation Sunrise Point-LP Serial IO I2C Controller #1 [8086:9d61] (rev 21)
        Subsystem: Dell Sunrise Point-LP Serial IO I2C Controller [1028:0704]
        Kernel driver in use: intel-lpss
        Kernel modules: intel_lpss_pci
00:16.0 Communication controller [0780]: Intel Corporation Sunrise Point-LP CSME HECI #1 [8086:9d3a] (rev 21)
        Subsystem: Dell Sunrise Point-LP CSME HECI [1028:0704]
        Kernel driver in use: mei_me
        Kernel modules: mei_me
00:17.0 SATA controller [0106]: Intel Corporation Sunrise Point-LP SATA Controller [AHCI mode] [8086:9d03] (rev 21)
        Subsystem: Dell Sunrise Point-LP SATA Controller [AHCI mode] [1028:0704]
        Kernel driver in use: ahci
        Kernel modules: ahci
00:1c.0 PCI bridge [0604]: Intel Corporation Sunrise Point-LP PCI Express Root Port #1 [8086:9d10] (rev f1)
        Kernel driver in use: pcieport
00:1c.4 PCI bridge [0604]: Intel Corporation Sunrise Point-LP PCI Express Root Port #5 [8086:9d14] (rev f1)
        Kernel driver in use: pcieport
00:1c.5 PCI bridge [0604]: Intel Corporation Sunrise Point-LP PCI Express Root Port #6 [8086:9d15] (rev f1)
        Kernel driver in use: pcieport
00:1d.0 PCI bridge [0604]: Intel Corporation Sunrise Point-LP PCI Express Root Port #9 [8086:9d18] (rev f1)
        Kernel driver in use: pcieport
00:1f.0 ISA bridge [0601]: Intel Corporation Sunrise Point-LP LPC Controller [8086:9d48] (rev 21)
        Subsystem: Dell Sunrise Point-LP LPC Controller [1028:0704]
00:1f.2 Memory controller [0580]: Intel Corporation Sunrise Point-LP PMC [8086:9d21] (rev 21)
        Subsystem: Dell Sunrise Point-LP PMC [1028:0704]
00:1f.3 Audio device [0403]: Intel Corporation Sunrise Point-LP HD Audio [8086:9d70] (rev 21)
        Subsystem: Dell Sunrise Point-LP HD Audio [1028:0704]
        Kernel driver in use: snd_hda_intel
        Kernel modules: snd_hda_intel
00:1f.4 SMBus [0c05]: Intel Corporation Sunrise Point-LP SMBus [8086:9d23] (rev 21)
        Subsystem: Dell Sunrise Point-LP SMBus [1028:0704]
        Kernel driver in use: i801_smbus
        Kernel modules: i2c_i801
3a:00.0 Network controller [0280]: Intel Corporation Wireless 7265 [8086:095a] (rev 59)
        Subsystem: Intel Corporation Dual Band Wireless-AC 7265 [8086:5010]
        Kernel driver in use: iwlwifi
        Kernel modules: iwlwifi
3b:00.0 Unassigned class [ff00]: Realtek Semiconductor Co., Ltd. RTS525A PCI Express Card Reader [10ec:525a] (rev 01)
        Subsystem: Dell RTS525A PCI Express Card Reader [1028:0704]
        Kernel driver in use: rtsx_pci
        Kernel modules: rtsx_pci
3c:00.0 Non-Volatile memory controller [0108]: Samsung Electronics Co Ltd NVMe SSD Controller SM951/PM951 [144d:a802] (rev 01)
        Subsystem: Samsung Electronics Co Ltd NVMe SSD Controller SM951/PM951 [144d:a801]
        Kernel driver in use: nvme


I'm still missing some drivers, in particular for these three:

Code:
00:04.0 Signal processing controller [1180]: Intel Corporation Xeon E3-1200 v5/E3-1500 v5/6th Gen Core Processor Thermal Subsystem [8086:1903] (rev 08)
        Subsystem: Dell Xeon E3-1200 v5/E3-1500 v5/6th Gen Core Processor Thermal Subsystem [1028:0704]
00:1f.0 ISA bridge [0601]: Intel Corporation Sunrise Point-LP LPC Controller [8086:9d48] (rev 21)
        Subsystem: Dell Sunrise Point-LP LPC Controller [1028:0704]
00:1f.2 Memory controller [0580]: Intel Corporation Sunrise Point-LP PMC [8086:9d21] (rev 21)
        Subsystem: Dell Sunrise Point-LP PMC [1028:0704]


Not sure if they need a driver, or which driver it would be.

Thanks for all your help so far!
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russK
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PostPosted: Mon Aug 27, 2018 2:22 am    Post subject: Reply with quote

Gh0str1d3r wrote:
russK, what type of computer do you have? Would you mind sharing your .config and your lspci -nnk?


This is a MSI X470 Gaming Pro Carbon. Lots of AMD stuff, so the details are pretty different from yours. Note I have a slower Corsair NVME because there is another M.2 slot and I figured there was no point leaving it empty.
Code:
lspci -nnk
00:00.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-0fh) Root Complex [1022:1450]
   Subsystem: Micro-Star International Co., Ltd. [MSI] Family 17h (Models 00h-0fh) Root Complex [1462:7b78]
00:00.2 IOMMU [0806]: Advanced Micro Devices, Inc. [AMD] Device [1022:1451]
   Subsystem: Advanced Micro Devices, Inc. [AMD] Device [1022:1451]
00:01.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-0fh) PCIe Dummy Host Bridge [1022:1452]
00:01.1 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:1453]
   Kernel driver in use: pcieport
   Kernel modules: shpchp
00:01.3 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:1453]
   Kernel driver in use: pcieport
   Kernel modules: shpchp
00:02.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-0fh) PCIe Dummy Host Bridge [1022:1452]
00:03.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-0fh) PCIe Dummy Host Bridge [1022:1452]
00:03.1 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:1453]
   Kernel driver in use: pcieport
   Kernel modules: shpchp
00:03.2 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:1453]
   Kernel driver in use: pcieport
   Kernel modules: shpchp
00:04.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-0fh) PCIe Dummy Host Bridge [1022:1452]
00:07.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-0fh) PCIe Dummy Host Bridge [1022:1452]
00:07.1 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-0fh) Internal PCIe GPP Bridge 0 to Bus B [1022:1454]
   Kernel driver in use: pcieport
   Kernel modules: shpchp
00:08.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-0fh) PCIe Dummy Host Bridge [1022:1452]
00:08.1 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-0fh) Internal PCIe GPP Bridge 0 to Bus B [1022:1454]
   Kernel driver in use: pcieport
   Kernel modules: shpchp
00:14.0 SMBus [0c05]: Advanced Micro Devices, Inc. [AMD] FCH SMBus Controller [1022:790b] (rev 59)
   Subsystem: Micro-Star International Co., Ltd. [MSI] FCH SMBus Controller [1462:7b78]
   Kernel driver in use: piix4_smbus
   Kernel modules: i2c_piix4, sp5100_tco
00:14.3 ISA bridge [0601]: Advanced Micro Devices, Inc. [AMD] FCH LPC Bridge [1022:790e] (rev 51)
   Subsystem: Micro-Star International Co., Ltd. [MSI] FCH LPC Bridge [1462:7b78]
00:18.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-0fh) Data Fabric: Device 18h; Function 0 [1022:1460]
00:18.1 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-0fh) Data Fabric: Device 18h; Function 1 [1022:1461]
00:18.2 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-0fh) Data Fabric: Device 18h; Function 2 [1022:1462]
00:18.3 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-0fh) Data Fabric: Device 18h; Function 3 [1022:1463]
00:18.4 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-0fh) Data Fabric: Device 18h; Function 4 [1022:1464]
00:18.5 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-0fh) Data Fabric: Device 18h; Function 5 [1022:1465]
00:18.6 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-0fh) Data Fabric Device 18h Function 6 [1022:1466]
00:18.7 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-0fh) Data Fabric: Device 18h; Function 7 [1022:1467]
01:00.0 Non-Volatile memory controller [0108]: Samsung Electronics Co Ltd NVMe SSD Controller SM951/PM951 [144d:a802] (rev 01)
   Subsystem: Samsung Electronics Co Ltd NVMe SSD Controller SM951/PM951 [144d:a801]
   Kernel driver in use: nvme
03:00.0 USB controller [0c03]: Advanced Micro Devices, Inc. [AMD] Device [1022:43d0] (rev 01)
   Subsystem: ASMedia Technology Inc. Device [1b21:1142]
   Kernel driver in use: xhci_hcd
03:00.1 SATA controller [0106]: Advanced Micro Devices, Inc. [AMD] Device [1022:43c8] (rev 01)
   Subsystem: ASMedia Technology Inc. Device [1b21:1062]
   Kernel driver in use: ahci
03:00.2 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:43c6] (rev 01)
   Kernel driver in use: pcieport
   Kernel modules: shpchp
16:00.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:43c7] (rev 01)
   Kernel driver in use: pcieport
   Kernel modules: shpchp
16:01.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:43c7] (rev 01)
   Kernel driver in use: pcieport
   Kernel modules: shpchp
16:02.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:43c7] (rev 01)
   Kernel driver in use: pcieport
   Kernel modules: shpchp
16:03.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:43c7] (rev 01)
   Kernel driver in use: pcieport
   Kernel modules: shpchp
16:04.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Device [1022:43c7] (rev 01)
   Kernel driver in use: pcieport
   Kernel modules: shpchp
18:00.0 Ethernet controller [0200]: Intel Corporation I211 Gigabit Network Connection [8086:1539] (rev 03)
   Subsystem: Micro-Star International Co., Ltd. [MSI] I211 Gigabit Network Connection [1462:7b78]
1b:00.0 Non-Volatile memory controller [0108]: Device [1987:5008] (rev 01)
   Subsystem: Device [1987:5008]
   Kernel driver in use: nvme
1c:00.0 VGA compatible controller [0300]: NVIDIA Corporation GP106 [GeForce GTX 1060 6GB] [10de:1c03] (rev a1)
   Subsystem: Gigabyte Technology Co., Ltd GP106 [GeForce GTX 1060 6GB] [1458:3716]
   Kernel driver in use: nvidia
   Kernel modules: nvidia_drm, nvidia
1c:00.1 Audio device [0403]: NVIDIA Corporation GP106 High Definition Audio Controller [10de:10f1] (rev a1)
   Subsystem: Gigabyte Technology Co., Ltd GP106 High Definition Audio Controller [1458:3716]
   Kernel driver in use: snd_hda_intel
   Kernel modules: snd_hda_intel
1d:00.0 SATA controller [0106]: Marvell Technology Group Ltd. 88SE9235 PCIe 2.0 x2 4-port SATA 6 Gb/s Controller [1b4b:9235] (rev 11)
   Subsystem: Marvell Technology Group Ltd. 88SE9235 PCIe 2.0 x2 4-port SATA 6 Gb/s Controller [1b4b:9235]
   Kernel driver in use: ahci
1e:00.0 Non-Essential Instrumentation [1300]: Advanced Micro Devices, Inc. [AMD] Device [1022:145a]
   Subsystem: Advanced Micro Devices, Inc. [AMD] Device [1022:145a]
1e:00.2 Encryption controller [1080]: Advanced Micro Devices, Inc. [AMD] Device [1022:1456]
   Subsystem: Advanced Micro Devices, Inc. [AMD] Device [1022:1456]
1e:00.3 USB controller [0c03]: Advanced Micro Devices, Inc. [AMD] USB 3.0 Host controller [1022:145f]
   Subsystem: Micro-Star International Co., Ltd. [MSI] USB 3.0 Host controller [1462:7b78]
   Kernel driver in use: xhci_hcd
1f:00.0 Non-Essential Instrumentation [1300]: Advanced Micro Devices, Inc. [AMD] Device [1022:1455]
   Subsystem: Advanced Micro Devices, Inc. [AMD] Device [1022:1455]
1f:00.2 SATA controller [0106]: Advanced Micro Devices, Inc. [AMD] FCH SATA Controller [AHCI mode] [1022:7901] (rev 51)
   Subsystem: Micro-Star International Co., Ltd. [MSI] FCH SATA Controller [AHCI mode] [1462:7b78]
   Kernel driver in use: ahci
1f:00.3 Audio device [0403]: Advanced Micro Devices, Inc. [AMD] Device [1022:1457]
   Subsystem: Micro-Star International Co., Ltd. [MSI] Device [1462:cb78]
   Kernel driver in use: snd_hda_intel
   Kernel modules: snd_hda_intel

My 4.14.65-gentoo .config is here: https://paste.pound-python.org/show/NWzIyWeYiOObVOfYQ24A/

One thing I did some time ago during a kernel upgrade was a 'make localmodconfig' and looked at the result against my previous .config with meld. I turned off a lot of modules I was not using. I may do this exercise again soon because this motherboard is new for me, I just did a heart transplant on this box.

HTH
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P.Kosunen
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Joined: 21 Nov 2005
Posts: 309
Location: Finland

PostPosted: Tue Aug 28, 2018 1:27 pm    Post subject: Reply with quote

Gh0str1d3r wrote:
Not sure if they need a driver, or which driver it would be.

You could boot SystemRescueCd etc livecd and see what drivers it use.
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Anon-E-moose
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Joined: 23 May 2008
Posts: 3557
Location: Dallas area

PostPosted: Tue Aug 28, 2018 1:32 pm    Post subject: Reply with quote

P.Kosunen wrote:
Gh0str1d3r wrote:
Not sure if they need a driver, or which driver it would be.

You could boot SystemRescueCd etc livecd and see what drivers it use.


Good idea, I believe that sysrescuecd has hdparm on it also, so could be run from there.
_________________
Asus m5a99fx, FX 8320 - nouveau & radeon, oss4
Acer laptop E5-575, i3-7100u - i965, alsa
---both---
4.14.62 kernel, profile 17.0 (no-pie) amd64-no-multilib
gcc 7.3.0, eudev, openrc, openbox, palemoon
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russK
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Joined: 27 Jun 2006
Posts: 607

PostPosted: Wed Aug 29, 2018 1:24 am    Post subject: Reply with quote

Gh0str1d3r,

Maybe you should also check the health of the device with smartctl or nvme-cli. Can't say that I know how to interpret much of this:
Code:
smartctl -a /dev/nvme0
Password:
smartctl 6.6 2017-11-05 r4594 [x86_64-linux-4.14.65-gentoo] (local build)
Copyright (C) 2002-17, Bruce Allen, Christian Franke, www.smartmontools.org

=== START OF INFORMATION SECTION ===
Model Number:                       Samsung SSD 950 PRO 256GB
Serial Number:                      S2GLNCAGC19033E
Firmware Version:                   1B0QBXX7
PCI Vendor/Subsystem ID:            0x144d
IEEE OUI Identifier:                0x002538
Controller ID:                      1
Number of Namespaces:               1
Namespace 1 Size/Capacity:          256,060,514,304 [256 GB]
Namespace 1 Utilization:            89,343,729,664 [89.3 GB]
Namespace 1 Formatted LBA Size:     512
Namespace 1 IEEE EUI-64:            002538 5cf150576c
Local Time is:                      Tue Aug 28 21:11:49 2018 EDT
Firmware Updates (0x06):            3 Slots
Optional Admin Commands (0x0007):   Security Format Frmw_DL
Optional NVM Commands (0x001f):     Comp Wr_Unc DS_Mngmt Wr_Zero Sav/Sel_Feat
Maximum Data Transfer Size:         32 Pages

Supported Power States
St Op     Max   Active     Idle   RL RT WL WT  Ent_Lat  Ex_Lat
 0 +     6.50W       -        -    0  0  0  0        5       5
 1 +     5.80W       -        -    1  1  1  1       30      30
 2 +     3.60W       -        -    2  2  2  2      100     100
 3 -   0.0700W       -        -    3  3  3  3      500    5000
 4 -   0.0050W       -        -    4  4  4  4     2000   22000

Supported LBA Sizes (NSID 0x1)
Id Fmt  Data  Metadt  Rel_Perf
 0 +     512       0         0

=== START OF SMART DATA SECTION ===
SMART overall-health self-assessment test result: PASSED

SMART/Health Information (NVMe Log 0x02, NSID 0xffffffff)
Critical Warning:                   0x00
Temperature:                        47 Celsius
Available Spare:                    100%
Available Spare Threshold:          10%
Percentage Used:                    2%
Data Units Read:                    11,612,980 [5.94 TB]
Data Units Written:                 28,078,858 [14.3 TB]
Host Read Commands:                 181,723,842
Host Write Commands:                839,061,593
Controller Busy Time:               3,172
Power Cycles:                       494
Power On Hours:                     15,780
Unsafe Shutdowns:                   300
Media and Data Integrity Errors:    0
Error Information Log Entries:      5

Error Information (NVMe Log 0x01, max 64 entries)
Num   ErrCount  SQId   CmdId  Status  PELoc          LBA  NSID    VS
  0          5     0  0x0014  0x4004  0x000            0     0     -
  1          4     0  0x0005  0x4004  0x000            0     0     -
  2          3     0  0x0005  0x4004  0x000            0     0     -
  3          2     0  0x0017  0x4004  0x000            0     0     -
  4          1     0  0x001d  0x4004  0x000            0     0     -

Code:
nvme smart-log /dev/nvme0n1
Smart Log for NVME device:nvme0n1 namespace-id:ffffffff
critical_warning                    : 0
temperature                         : 47 C
available_spare                     : 100%
available_spare_threshold           : 10%
percentage_used                     : 2%
data_units_read                     : 11,612,985
data_units_written                  : 28,078,971
host_read_commands                  : 181,723,869
host_write_commands                 : 839,064,074
controller_busy_time                : 3,172
power_cycles                        : 494
power_on_hours                      : 15,780
unsafe_shutdowns                    : 300
media_errors                        : 0
num_err_log_entries                 : 5
Warning Temperature Time            : 0
Critical Composite Temperature Time : 0
Thermal Management T1 Trans Count   : 0
Thermal Management T2 Trans Count   : 0
Thermal Management T1 Total Time    : 0
Thermal Management T2 Total Time    : 0
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