Slowdown Unicast and Multicast after upgrading FOG Server

mp12

Here the output:

/dev/sda:

ATA device, with non-removable media
	Model Number:       Samsung SSD 860 EVO 500GB               
	Serial Number:      S3Z2NB1KA50028H     
	Firmware Revision:  RVT01B6Q
	Transport:          Serial, ATA8-AST, SATA 1.0a, SATA II Extensions, SATA Rev 2.5, SATA Rev 2.6, SATA Rev 3.0
Standards:
	Used: unknown (minor revision code 0x005e) 
	Supported: 11 8 7 6 5 
	Likely used: 11
Configuration:
	Logical		max	current
	cylinders	16383	16383
	heads		16	16
	sectors/track	63	63
	--
	CHS current addressable sectors:    16514064
	LBA    user addressable sectors:   268435455
	LBA48  user addressable sectors:   976773168
	Logical  Sector size:                   512 bytes
	Physical Sector size:                   512 bytes
	Logical Sector-0 offset:                  0 bytes
	device size with M = 1024*1024:      476940 MBytes
	device size with M = 1000*1000:      500107 MBytes (500 GB)
	cache/buffer size  = unknown
	Form Factor: 2.5 inch
	Nominal Media Rotation Rate: Solid State Device
Capabilities:
	LBA, IORDY(can be disabled)
	Queue depth: 32
	Standby timer values: spec'd by Standard, no device specific minimum
	R/W multiple sector transfer: Max = 1	Current = 1
	DMA: mdma0 mdma1 mdma2 udma0 udma1 udma2 udma3 udma4 udma5 *udma6 
	     Cycle time: min=120ns recommended=120ns
	PIO: pio0 pio1 pio2 pio3 pio4 
	     Cycle time: no flow control=120ns  IORDY flow control=120ns
Commands/features:
	Enabled	Supported:
	   *	SMART feature set
	    	Security Mode feature set
	   *	Power Management feature set
	   *	Write cache
	   *	Look-ahead
	   *	Host Protected Area feature set
	   *	WRITE_BUFFER command
	   *	READ_BUFFER command
	   *	NOP cmd
	   *	DOWNLOAD_MICROCODE
	    	SET_MAX security extension
	   *	48-bit Address feature set
	   *	Device Configuration Overlay feature set
	   *	Mandatory FLUSH_CACHE
	   *	FLUSH_CACHE_EXT
	   *	SMART error logging
	   *	SMART self-test
	   *	General Purpose Logging feature set
	   *	WRITE_{DMA|MULTIPLE}_FUA_EXT
	   *	64-bit World wide name
	    	Write-Read-Verify feature set
	   *	WRITE_UNCORRECTABLE_EXT command
	   *	{READ,WRITE}_DMA_EXT_GPL commands
	   *	Segmented DOWNLOAD_MICROCODE
	   *	Gen1 signaling speed (1.5Gb/s)
	   *	Gen2 signaling speed (3.0Gb/s)
	   *	Gen3 signaling speed (6.0Gb/s)
	   *	Native Command Queueing (NCQ)
	   *	Phy event counters
	   *	READ_LOG_DMA_EXT equivalent to READ_LOG_EXT
	   *	DMA Setup Auto-Activate optimization
	    	Device-initiated interface power management
	   *	Asynchronous notification (eg. media change)
	   *	Software settings preservation
	    	Device Sleep (DEVSLP)
	   *	SMART Command Transport (SCT) feature set
	   *	SCT Write Same (AC2)
	   *	SCT Error Recovery Control (AC3)
	   *	SCT Features Control (AC4)
	   *	SCT Data Tables (AC5)
	   *	reserved 69[4]
	   *	DOWNLOAD MICROCODE DMA command
	   *	SET MAX SETPASSWORD/UNLOCK DMA commands
	   *	WRITE BUFFER DMA command
	   *	READ BUFFER DMA command
	   *	Data Set Management TRIM supported (limit 8 blocks)
	   *	Deterministic read ZEROs after TRIM
Security: 
	Master password revision code = 65534
		supported
	not	enabled
	not	locked
		frozen
	not	expired: security count
		supported: enhanced erase
	4min for SECURITY ERASE UNIT. 8min for ENHANCED SECURITY ERASE UNIT.
Logical Unit WWN Device Identifier: 5002538e408a5e55
	NAA		: 5
	IEEE OUI	: 002538
	Unique ID	: e408a5e55
Device Sleep:
	DEVSLP Exit Timeout (DETO): 50 ms (drive)
	Minimum DEVSLP Assertion Time (MDAT): 30 ms (drive)
Checksum: correct

george1421

@mp12 I assume you ran the last hdparm from a debug console on the target computer. If so lets run this one too hdparm -Tt /dev/sda That should give us the disk performance test. I’m not totally convinced its a target computer issue, but we need to start collecting data where we can.

mp12

@george1421

/dev/sda:
 Timing cached reads:   29692 MB in  1.99 seconds = 14911.18 MB/sec
 Timing buffered disk reads: 1614 MB in  3.00 seconds = 537.87 MB/sec

george1421

@mp12 Read performance is what I would expect from an SSD drive.

The next bit we will test write performance. For this we need to collect the structure of the existing SSD drive. What we need to find is a partition that has at least 1GB of disk space.

Show me the output from this command: lsblk (executed on the target computer in a debug console)

NOTE: The document I’m working from is referenced here: https://forums.fogproject.org/topic/10459/can-you-make-fog-imaging-go-fast

Quazz

@george1421 He did some write tests earlier at around ~100MB/s from RAM to disk using dd.

george1421

@Quazz Interesting, on the previous dd test. I would like to see this dd test and then the next step is an iperf test. That will test local disk and then network without involving the nfs stack or partclone. At least in my mind is how I would break it down. Something had to have changed besides fog.

mp12

@george1421

Server

-----------------------------------------------------------
Server listening on 5201
-----------------------------------------------------------
Accepted connection from x.x.x.x, port 50672
[  5] local x.x.x.x port 5201 connected to x.x.x.x port 50674
[ ID] Interval           Transfer     Bandwidth
[  5]   0.00-1.00   sec   108 MBytes   903 Mbits/sec
[  5]   1.00-2.00   sec   112 MBytes   942 Mbits/sec
[  5]   2.00-3.00   sec   112 MBytes   942 Mbits/sec
[  5]   3.00-4.00   sec   112 MBytes   942 Mbits/sec
[  5]   4.00-5.00   sec   112 MBytes   942 Mbits/sec
[  5]   5.00-6.00   sec   112 MBytes   942 Mbits/sec
[  5]   6.00-7.00   sec   112 MBytes   942 Mbits/sec
[  5]   7.00-8.00   sec   112 MBytes   942 Mbits/sec
[  5]   8.00-9.00   sec   112 MBytes   942 Mbits/sec
[  5]   9.00-10.00  sec   112 MBytes   942 Mbits/sec
[  5]  10.00-10.04  sec  4.35 MBytes   937 Mbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bandwidth       Retr
[  5]   0.00-10.04  sec  1.10 GBytes   939 Mbits/sec   11             sender
[  5]   0.00-10.04  sec  1.10 GBytes   938 Mbits/sec                  receiver
-----------------------------------------------------------
Server listening on 5201
-----------------------------------------------------------

Client

Connecting to host x.x.x.x, port 5201
[  5] local x.x.x.x port 50674 connected to x.x.x.x port 5201
[ ID] Interval           Transfer     Bitrate         Retr  Cwnd
[  5]   0.00-1.00   sec   113 MBytes   947 Mbits/sec    3    258 KBytes       
[  5]   1.00-2.00   sec   112 MBytes   943 Mbits/sec    0    364 KBytes       
[  5]   2.00-3.00   sec   112 MBytes   939 Mbits/sec    2    232 KBytes       
[  5]   3.00-4.00   sec   112 MBytes   943 Mbits/sec    1    318 KBytes       
[  5]   4.00-5.00   sec   112 MBytes   943 Mbits/sec    2    211 KBytes       
[  5]   5.00-6.00   sec   112 MBytes   943 Mbits/sec    0    364 KBytes       
[  5]   6.00-7.00   sec   112 MBytes   943 Mbits/sec    1    267 KBytes       
[  5]   7.00-8.00   sec   112 MBytes   943 Mbits/sec    1    364 KBytes       
[  5]   8.00-9.00   sec   112 MBytes   943 Mbits/sec    0    366 KBytes       
[  5]   9.00-10.00  sec   112 MBytes   943 Mbits/sec    1    282 KBytes       
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bitrate         Retr
[  5]   0.00-10.00  sec  1.10 GBytes   943 Mbits/sec   11             sender
[  5]   0.00-10.00  sec  1.10 GBytes   942 Mbits/sec                  receiver

iperf Done.

Quazz

@mp12 I found somewhat similiar situations on google where the conclusion was to use Secure Erase on the drive first. Worth a try just to see if it helps?

mp12

@Quazz

Did my best. After trying I noticed that the “frozen state” was active. Removing the SSD power cable while PC was powered on removed the frozen state. Then I was able to do a secure erase. A dd from ramdisk to /dev/sda was at the same speed as before. So no luck at all.

mp12

@Sebastian-Roth @Quazz @george1421

I have some good and bad news.

First the good ones:

I created a deploy using the FOG.Wiki https://wiki.fogproject.org/wiki/index.php/Debug_Mode#Win_7
Therefor I booted a Clonezilla (2.6.4-10-amd64) Flashdrive and mounted the NFS-Share from FOG Server.

I started the deploy with the following command:

cat /images/IMAGEPATH/d1p2.img | zstd -d | sudo partclone.restore -O /dev/sda2 -N -f -i

Tried a deploy with the fog client and still one-third of the expected speed.
I think there is something wrong in the deploy process.
Main difference I can see is that the FOS uses Partclone 0.3.12 and Clonezilla 0.3.13.

Quazz

@mp12 I vaguely recalled someone having this problem before with similar outcomes.

Linking here for further reference: https://forums.fogproject.org/topic/13733/hp-elitebook-830-gen-6-issues-capturing-images-and-deploying-images/10

Our kernels and inits have since received a few upgrades, however.

Are you on the dev-branch, by the way? I don’t believe 1.5.7 was launched with partclone 0.3.12 (that’s for the upcoming release).

If not, then try the init and kernel files from https://dev.fogproject.org/blue/organizations/jenkins/fos/detail/master/122/artifacts

mp12

@Quazz said in Slowdown Unicast and Multicast after upgrading FOG Server:

Are you on the dev-branch

Yes I am on the dev-branch 1.5.7.109 (bzImage Version: 4.19.101)

mp12

@Quazz said in Slowdown Unicast and Multicast after upgrading FOG Server:

I vaguely recalled someone having this problem before with similar outcomes.
Linking here for further reference: https://forums.fogproject.org/topic/13733/hp-elitebook-830-gen-6-issues-capturing-images-and-deploying-images/10

Tried the bzImage529 and checked if RAMDISK size is correct.

Also tried the following Kernels which all end up with a KERNEL PANIC:
4.13.4, 4.11.1, 4.10.1, 4.9.11 and 4.8.11

Other kernels starting with 4.15.2 and above seem to work but not with the sufficient speed.

Sebastian Roth

@mp12 said in Slowdown Unicast and Multicast after upgrading FOG Server:

Therefor I booted a Clonezilla (2.6.4-10-amd64) Flashdrive

From what you wrote so far I would expect the kernel to make the difference. What kernel is in the CloneZilla you used? Boot to a command shell and run uname -a.

mp12

@Sebastian-Roth

Linux debian 5.3.0-1-amd64 #1 SMP Debian 5.3.7-1 (2019-10-19) x86_64 GNU/Linux

Quazz

@Sebastian-Roth I mean, the strange part is that the older versions gave him proper speed too. And it’s not like this is a universal problem since others have not experienced such a large performance difference between FOG versions.

So I guess it’s time for more information to try and pin down the source of it all.

@mp12 Can you list a full spec list of a troubled machine? (or perhaps even two or three different ones if you have that)

It almost assuredly has to be some kind of interaction between certain kind of hardware and the Linux kernel (and its config), so we have to try and narrow it down or at least get a clearer picture of what we’re dealing with.

george1421

@Quazz would the complete fog inventory for this system give us enough data or do we need to dig deeper? If it doesn’t give us all of the data at least it would be a start. What would be grand is of the OP had 2 systems on his campus where one worked correctly and the other is slow. Then we could contrast and compare these two systems.

@Sebastian-Roth Is there a place where we can still download the 1.5.5 or 1.5.6 binaries zip file? I’m wondering if we replace the current bzImage and init.xz with the ones from 1.5.5 or 1.5.6 does that change the performance of these systems. While I highly doubt its the FOG server, this would at least isolate the issue to the FOS Linux install (unless that is our conclusion already).

Sebastian Roth

@george1421 Good point on trying the older binaries. Though I’d expect that you get issues going back to very early binary versions like 1.5.3… They are all available on the fogproject.org website:
https://fogproject.org/binaries1.5.6.zip
https://fogproject.org/binaries1.5.5.zip
and so on all the way to 1.3.0…

george1421

@Sebastian-Roth Yes going back to 1.5.3 version of FOS (at least for the inits) would be a good test of before and after upgrades causing this slowness. All the OP needs to do is download and extract the init.xz file from the zip file and move it to the FOG server to test.

Sebastian Roth

@george1421 @mp12 Using init and kernel binaries from the same archive as you will run into kernel panics quite easily if you do otherwise.

@mp12 I am wondering if you see the same slowness on many different types of hardware or if it’s all machines with the Samsung SSD 860 EVO 500GB??

EDIT: Reading through the whole topic again I stumbled upon this:

[ ID] Interval           Transfer     Bitrate         Retr
[  5]   0.00-10.00  sec  1.10 GBytes   943 Mbits/sec   11             sender
[  5]   0.00-10.00  sec  1.10 GBytes   942 Mbits/sec                  receiver

Eleven retries for a file transfer over a period of 10 seconds seems a lot to me. So we might look at a combination of issues here.

Slowdown Unicast and Multicast after upgrading FOG Server

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