High-end, mission-critical systems often use a plethora of diagnostic routines for power-on self test (POST), data logging, operational measurements, Built-In Self Test (BIST), and platform audits. Embedded x86 JTAG run-control adds out-of-band services to this mix. This article describes one such use case for Power-On Self Test (POST) of PCI Express ports.
Out-of-band access between on-board BMCs and CPU JTAG chains is now a de facto implementation on hyperscale servers manufactured by the ODMs. This article describes the BMC firmware library within our ScanWorks Embedded Diagnostics (SED) product used to run diagnostics at-scale.
In the article JTAG and run-control API in BMCs for at-scale debug, I described how embedding the Intel ITP run-control library down on a service processor provides for a rich set of target-based functions for debug forensics. How might this apply to reading MSRs, such as the ones created to address Spectre and Meltdown.
In my last blog, I observed that running Yocto Linux builds with all 16 threads of my new AMD Ryzen 7 1700X machine would always crash. Running under VirtualBox and only using one thread always worked; but it took seven hours. Could I achieve a compromise?
In Episode 24, I finished off my new build machine, successfully did a QEMU image build on it, and loaded an off-the-shelf Ubuntu image into my new MinnowBoard Turbot. This week, I tackled a MinnowBoard Linux image build using Yocto, loaded it into my MinnowBoard, and also set about doing a Yocto image build for the Portwell Neptune Alpha board. But I ran into some problems.
In Episode 23, I mentioned taking a short sabbatical, because my MinnowBoard USB ports stopped working, and my 7-year-old home PC build machine crashed. The good news is both of these issues are both fixed! Let the fun begin again.
Intel® has announced the new family of 8th Gen Intel Core desktop processors, available for purchase beginning October 5, 2017. ASSET's SourcePoint has supported the 8th Gen (codenamed Coffee Lake) since earliest silicon.