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XPS 15 9570: More DPC latency improvements inbound

BIOS 1.10.1 reduced but did not eliminate the DPC latency issues affecting some XPS 15 9570 laptops. (Image source: Dell)
BIOS 1.10.1 reduced but did not eliminate the DPC latency issues affecting some XPS 15 9570 laptops. (Image source: Dell)
It seems that Dell has not forgotten about the XPS 15 9570 in the wake of releasing its successor. The company has committed to further reducing the DPC latency issues still affecting some machines beyond the BIOS release that it released in April.

So, while Dell now seems content on blaming its customers if their XPS 15 9570 gets hot and drains its battery when asleep, the company has not forgotten about those pesky DPC latency issues. DPC, or Deferred Procedure Call, allows drivers to execute tasks and helps the system process them based on their importance. Poorly written or buggy drivers eat up resources by making numerous DPC instructions, which makes it difficult for the system to prioritise important tasks. In practical terms, this can cause audio stutters and glitches when playing music.

The main culprit of these high latency spikes is ACPI.sys, which Dell first announced that it was working to address almost eight months ago. The company had hoped that the release of BIOS 1.10.1 would resolve any DPC latency issues, but it only managed to reduce the frequency and intensity of these latency spikes.

Now an XPS Community Engagement representative, replying to someone pressing Dell for any DPC and XPS 15 9570 related news on Twitter, has stated the following:

We're definitely committed to improving the experience even more beyond the updates we made to the latest BIOS.

The representative did not divulge a timeframe for Dell publishing any additional fixes, but hopefully these are more than just placating words for one disgruntled XPS 15 9570 owner. Either way, it is promising that Dell has not forgotten about the XPS 15 9570, right? Hope springs eternal.

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> Notebook / Laptop Reviews and News > News > News Archive > Newsarchive 2019 06 > XPS 15 9570: More DPC latency improvements inbound
Alex Alderson, 2019-06-10 (Update: 2019-06-10)
Alex Alderson
Alex Alderson - News Editor - @aldersonaj
Prior to writing and translating for Notebookcheck, I worked for various companies including and Apple Neowin. I have a BA in International History and Politics from the University of Leeds, which I have since converted to a Law Degree. Happy to chat on Twitter or Notebookchat.