[0.14.7][posila] Desync loop

[PhyRo]

Me and my friend are getting these desyncs since 0.14.0 ish.
Once we get the desync and the desync report is created we get another desync and then another and so on, until we reach maximum desyncs or quit the game.
Desyncs seems to be random, we have been doing diffrent stuff each time a desync happens.
Server restart helps, but inevitable the desync always happen.

[EDIT]
Running a headless server
[/EDIT]

[EDIT2]
Server log of latest desync
https://drive.google.com/open?id=0B0_cN ... FRyZDlfZ0E
[/EDIT2]

[posila]

Hi, what CPU is on your server? We don't have this information in our log (but we will have it in 0.14.8)

[PhyRo]

it's an oldie

model name : AMD Phenom(tm) II X2 545 Processor
4gig ram

(Sorry for the late reply)

[posila]

No worries, I am not quick to respond either.
And you say when you get to the desync loop and restart server, it fixes the desync loop.
That is interesting. Desync happens in the electric network statistics ... it is usually good indicator of desyncs because if some machine works differently also electric consumption is different.
It your case it seems the server rounds floating numbers differently than clients, but than server restart shouldn't fix desync loop.

More investigation is needed, but I am out-of-office for next few days.

[Loewchen]

it's an oldie
model name : AMD Phenom(tm) II X2 545 Processor
4gig ram

Could you find out the following:

1. the stepping (or revision) of the processor (if you don't know, a simple diagnostic tool like cpu-z or core-temp would tell you.)
2. equipping of the RAM (how many DIMMs, what speed)
3. if any of the deactivated cores have been reactivated

Thx.

[PhyRo]

model name : AMD Phenom(tm) II X2 545 Processor
stepping : 2

2 DIMMs 667mhz
No unlocked cores

cat cpuinfo

processor : 0
vendor_id : AuthenticAMD
cpu family : 16
model : 4
model name : AMD Phenom(tm) II X2 545 Processor
stepping : 2
microcode : 0x1000086
cpu MHz : 800.000
cache size : 512 KB
physical id : 0
siblings : 2
core id : 0
cpu cores : 2
apicid : 0
initial apicid : 0
fpu : yes
fpu_exception : yes
cpuid level : 5
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp lm 3dnowext 3dnow constant_tsc rep_good nopl nonstop_tsc extd_apicid pni monitor cx16 popcnt lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw ibs skinit wdt hw_pstate npt lbrv svm_lock nrip_save vmmcall
bogomips : 6027.30
TLB size : 1024 4K pages
clflush size : 64
cache_alignment : 64
address sizes : 48 bits physical, 48 bits virtual
power management: ts ttp tm stc 100mhzsteps hwpstate

processor : 1
vendor_id : AuthenticAMD
cpu family : 16
model : 4
model name : AMD Phenom(tm) II X2 545 Processor
stepping : 2
microcode : 0x1000086
cpu MHz : 800.000
cache size : 512 KB
physical id : 0
siblings : 2
core id : 1
cpu cores : 2
apicid : 1
initial apicid : 1
fpu : yes
fpu_exception : yes
cpuid level : 5
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp lm 3dnowext 3dnow constant_tsc rep_good nopl nonstop_tsc extd_apicid pni monitor cx16 popcnt lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw ibs skinit wdt hw_pstate npt lbrv svm_lock nrip_save vmmcall
bogomips : 6027.30
TLB size : 1024 4K pages
clflush size : 64
cache_alignment : 64
address sizes : 48 bits physical, 48 bits virtual
power management: ts ttp tm stc 100mhzsteps hwpstate

lshw cpu

*-cpu
description: CPU
product: AMD Phenom(tm) II X2 545 Processor
vendor: Advanced Micro Devices [AMD]
physical id: 3
bus info: cpu@0
version: AMD Phenom(tm) II X2 545 Processor
serial: To Be Filled By O.E.M.
slot: CPU1
size: 1800MHz
capacity: 3GHz
width: 64 bits
clock: 200MHz
capabilities: x86-64 fpu fpu_exception wp vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp 3dnowext 3dnow constant_tsc rep_good nopl nonstop_tsc extd_apicid pni monitor cx16 popcnt lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw ibs skinit wdt hw_pstate npt lbrv svm_lock nrip_save vmmcall cpufreq
configuration: cores=2 enabledcores=2 threads=2
*-cache:0
description: L1 cache
physical id: 5
slot: L1-Cache
size: 256KiB
capacity: 256KiB
capabilities: pipeline-burst internal varies data
*-cache:1
description: L2 cache
physical id: 6
slot: L2-Cache
size: 1MiB
capacity: 1MiB
capabilities: pipeline-burst internal varies unified
*-cache:2
description: L3 cache
physical id: 7
slot: L3-Cache
size: 24KiB
capacity: 24KiB
capabilities: pipeline-burst internal varies unified

memory lshw

*-memory:0
description: System Memory
physical id: 28
slot: System board or motherboard
size: 4GiB
*-bank:0
description: DIMM SDRAM Synchronous 667 MHz (1,5 ns)
product: ModulePartNumber00
vendor: Manufacturer00
physical id: 0
serial: SerNum00
slot: DIMM1
size: 2GiB
width: 64 bits
clock: 667MHz (1.5ns)
*-bank:1
description: DIMM SDRAM Synchronous 667 MHz (1,5 ns)
product: ModulePartNumber01
vendor: Manufacturer01
physical id: 1
serial: SerNum01
slot: DIMM2
size: 2GiB
width: 64 bits
clock: 667MHz (1.5ns)

[PhyRo]

In 0.14.8 the desync loop seems to have disappeared, had one desync, but that was only on my machine and i had no problem to connect and resume the after the desync report was finished.

In previous post, by "server restart" i was referring to restart of factorio server proc and not the machine itself.

[PhyRo]

[0.14.9]
Desynced again and got stuck in the desync loop until maximum desync was reached.
Could reconnect, but desynced again ~one minute later.

Desync reports :
https://drive.google.com/drive/folders/ ... sp=sharing

[kovarex]

We probably found a cause of this desync (My guess is 95% probability, we can't be sure as we didn't reproduce it).

So I'm moving to fixed for 0.14.10