OK, my Acer Aspire 5552 laptop is ancient, circa 2010, but it is running 18.3 cinnamon quite happily, BUT...
sudo lshw -class memory
reports the CPU cache as DISABLED
*-firmware
description: BIOS
vendor: Acer
physical id: 0
version: V2.14
date: 07/27/2011
size: 1MiB
capacity: 1984KiB
capabilities: pci upgrade shadowing cdboot bootselect socketedrom edd int13floppynec int13floppytoshiba int13floppy360 int13floppy1200 int13floppy720 int13floppy2880 int9keyboard int10video acpi usb
*-cache:0 DISABLED <<<<<<<<<<<<<<<<<<
description: L1 cache
physical id: 21
slot: L1 Cache
size: 256KiB
capacity: 256KiB
capabilities: internal write-through unified
configuration: level=1
*-cache:1 DISABLED <<<<<<<<<<<<<<<<<<
description: L1 cache
physical id: 22
slot: L2 Cache
size: 1MiB
capacity: 1MiB
capabilities: internal write-through unified
configuration: level=1
*-memory
description: System Memory
physical id: 23
slot: System board or motherboard
size: 6GiB
Is it telling me the truth? if so, how do I re-enable cache ?
I do have amd64-microcode version 2.20160316.1 active, but the lshw report is identical if I boot with no firmware update.
Any thoughts ??
JT:
lshw reports cache disabled
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lshw reports cache disabled
Last edited by LockBot on Wed Dec 28, 2022 7:16 am, edited 1 time in total.
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- catweazel
- Level 19
- Posts: 9763
- Joined: Fri Oct 12, 2012 9:44 pm
- Location: Australian Antarctic Territory
Re: lshw reports cache disabled
Please post the output of this terminal command:jontrv wrote: ⤴Thu Mar 15, 2018 4:05 pmCode: Select all
*-cache:0 DISABLED <<<<<<<<<<<<<<<<<< description: L1 cache physical id: 21 slot: L1 Cache size: 256KiB capacity: 256KiB capabilities: internal write-through unified configuration: level=1 *-cache:1 DISABLED <<<<<<<<<<<<<<<<<< description: L1 cache physical id: 22 slot: L2 Cache size: 1MiB capacity: 1MiB capabilities: internal write-through unified configuration: level=1
Code: Select all
lscpu
</>
code markers, which you can select from the mini toolbar above the textbox where you type your reply."There is, ultimately, only one truth -- cogito, ergo sum -- everything else is an assumption." - Me, my swansong.
Re: lshw reports cache disabled
results of sudo lscpu
Code: Select all
Architecture: x86_64
CPU op-mode(s): 32-bit, 64-bit
Byte Order: Little Endian
CPU(s): 2
On-line CPU(s) list: 0,1
Thread(s) per core: 1
Core(s) per socket: 2
Socket(s): 1
NUMA node(s): 1
Vendor ID: AuthenticAMD
CPU family: 16
Model: 6
Model name: AMD Athlon(tm) II P320 Dual-Core Processor
Stepping: 3
CPU MHz: 800.000
CPU max MHz: 2100.0000
CPU min MHz: 800.0000
BogoMIPS: 4189.74
Virtualisation: AMD-V
L1d cache: 64K
L1i cache: 64K
L2 cache: 512K
NUMA node0 CPU(s): 0,1
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 cpuid extd_apicid pni monitor cx16 popcnt lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a 3dnowprefetch osvw ibs skinit wdt nodeid_msr hw_pstate retpoline retpoline_amd rsb_ctxsw vmmcall npt lbrv svm_lock nrip_save
Re: lshw reports cache disabled
lsucpu does show L1/L2. It's showing single core L1d/L1i and same for L2. It does have two cores and sets of caches, so that might be a confusion point or a problem.
http://www.cpu-world.com/CPUs/K10/AMD-A ... R22GM.html
I'm thinking the DISABLE is a bug/error, and not a real problem.
I'm not aware of a Linux method to enable/disable directly. BIOS/firmware would have that ability.
I have another way to check them working. Run Memtest86+ from Grub menu. It should display and check them.
http://www.cpu-world.com/CPUs/K10/AMD-A ... R22GM.html
I'm thinking the DISABLE is a bug/error, and not a real problem.
I'm not aware of a Linux method to enable/disable directly. BIOS/firmware would have that ability.
I have another way to check them working. Run Memtest86+ from Grub menu. It should display and check them.
- catweazel
- Level 19
- Posts: 9763
- Joined: Fri Oct 12, 2012 9:44 pm
- Location: Australian Antarctic Territory
Re: lshw reports cache disabled
The kernel detects the caches correctly. @ClixTrix is correct, the disabled message is a bug.
"There is, ultimately, only one truth -- cogito, ergo sum -- everything else is an assumption." - Me, my swansong.
Re: lshw reports cache disabled
Memtst86 does not report anything i recognise as a problem, I guess it would unambiguously complain about a faulty cache, so...
Thank you all, I suspected it was a bug, but not being a software guru I had no means to prove it.
Now I just need to paint go-faster stripes on the lid... Patience is much cheaper than a new laptop !
JT:
Thank you all, I suspected it was a bug, but not being a software guru I had no means to prove it.
Now I just need to paint go-faster stripes on the lid... Patience is much cheaper than a new laptop !
JT: