Windows: Line-Based vs. Message Signaled-Based Interrupts. MSI tool.

Updated version is live
http://www.mediafire.com/file/2kkkvko7e75opce/MSI_util_v2.zip/file

Change log:
- Utility is built with .Net Framework 4.5.
- All columns (except for "name") now show a description (a tooltip) when user hovers the mouse pointer over the column headers.
- Two (read-only) columns were added for users with Win10 - "max limit" and "supported modes"

(^ that`s on my Win10 1803)
Column "max limit" shows the maximum number of message interrupts supported by device in hardware.
Column "supported modes" shows the interrupt modes supported by device in hardware.
On older versions of Windows these new columns should be hidden.
Both columns get their values from WMI. If something goes wrong with WMI they should stay empty.

 

Nice work, on the max limit and limit, in your pic the SATA controller shows a higher limit value than the max limit.
At first glance I would think max limit would be highest it can go?

 

The column "limit" shows the value from registry. So in Win10 1803 the SATA controller (generic MS driver - I have not installed Intel one) registry value for the limit is set to "8". But actual hardware controller (Intel C600 SATA controller from x79 chipset) supports maximum "1" message interrupt.

 

Ok, Got it, that makes sense.

 

disgusting, Medafire is now using fake virus advert redirects

>On older versions of Windows these new columns should be hidden.

Still visible on Win7

 

And empty?

 

omg yes thank you

 

Been using this program for a long time now and have recommending it to many others, thanks for your efforts mbk1969.

 

Btw, having info in the column "Supported modes" we can now exclude devices which do not support MSI. What do you think?

 

Yes, empty.

 

Thanks for the update.

 

I managed to keep only the nvme controller with irq 16 and I improved the performance with the anvil test.
The video card shared the same irq but now no, say that it could decrease performance by keeping it with a negative irq?

https://1drv.ms/u/s!As9lXBbpYQ-Bg_IcwRE55jDgRyOezA

 

I don`t understand your question. But in general IRQ sharing is not a good thing and should be avoided if possible. Have you tried to switch Realtek WIFI card to MSI mode?

Also be aware that any installation of NVIDIA drivers reverts videocard to legacy mode.

 

so msi signal is active with both negative and positive values? my question was like the laws, if shared or negative irq changed the performances, but you have already answered and then I thank you, it seems that less shares better performances possible

 

on the left I was with the irq shared, I was 4 with irq 16, on the right only the nvme controller with irq 16.
The video card did not have the setting for changing the MSI but creating the key I was able to change the video card as well

https://1drv.ms/u/s!As9lXBbpYQ-Bg_Id-dv8sOFMGJog1Q

 

Negative IRQ means MSI mode, positive IRQ - legacy mode. IRQ sharing is possible only in legacy mode.

Have you seen the utility in OP for switching devices between MSI and Legacy modes? I mean you can do it manually, and you can use utility - result will be the same.
http://www.mediafire.com/file/2kkkvko7e75opce/MSI_util_v2.zip


PS Also have you tried Samsung NVMe controller in MSI mode?

 

Yes is in msi/msi/x mode and gain performance

https://1drv.ms/u/s!As9lXBbpYQ-Bg_IeNsNV82MTKG7rwA

 

It is strange that USB 3 controller doesn`t support MSI mode, but no big deal (for USB).
You can ignore devices which has only Line mode - in best case they will ignore the setting in registry, in worst case they will BSOD.

 

I had this exact same situation with my old X99 motherboard as well, coupled with a 28-lane CPU (5820K). I suspect this is due to lane (mis)management for certain X99 motherboards. In Device Manager, the XHCI Controller was sharing IRQ with some other devices, too (sound card). No such problems with 40lane CPUs.

 

Who knows. To me it looks like mismanaged drivers - probably his motherboard has 3rd party USB3 controller working not with OEM drivers but with generic Microsoft ones.

I have 40 lanes CPU but devices use up to 25 lanes, so 28 is not bad quantity.