![]() ![]() ![]() I'll include a couple screenshots of QEMU 3.0 and HQEMU 2.5.2 running a benchmark in ReactOS 0.4.9 under full system emulation here you should be familiar with using QEMU by now, so I won't discuss its use further in this article. If you rebuild hqemu and you get a weird compile error while building some of the LLVM-related files, make sure that the llvm-config from the modified LLVM suite is first in your PATH (not the system one).It takes a couple minutes for a build with make -j24. My recommended configuration command line for the T2 family is: None of the other architectures or targets are supported. I haven't tried any of the ARM targets, but I have no reason to believe they don't work. x86_64-linux-user and i386-linux-user compile more or less as is, but you cannot compile x86_64-softmmu in HQEMU 2.5.2 (or any of the other software MMU targets) on ppc64le without this patch. It takes about 15 minutes to build LLVM and clang with make -j24. This makes your cmake command look like this, assuming you followed the steps in the manual exactly and are in the proper directory: Rather than install into /usr/local, I prefer to install into hqemu/llvm in my source directory to avoid tainting the system's version. I already have clang on the system and the LLVM build system uses it by default (though ordinarily I'm one of those people who prefer gcc), so I don't know if it will build with gcc, though it should. The included patch for 6.0 does not apply against 7.x. LLVM 7.0 is not supported I used LLVM 6.0.1.The step by step instructions for building HQEMU on ppc64le (PDF) work pretty much as is, except for the following: For this reason I recommend you have them both available and select the one that works best. However, despite its obvious performance gains, HQEMU is not currently suitable as a total QEMU replacement: it's based on an older QEMU (2.5.x) that is missing some later features and improvements, it still has some (possibly ppc64le-specific) notable bugs, and because it needs a modified LLVM it currently has to be built from source. HQEMU uses LLVM to further optimize the code generated by TCG in the background and can yield impressive performance benefits, and the latest version 2.5.2 now supports ppc64le as a host architecture. However, there is also a new experimental fork of QEMU to try called HQEMU. Make sure you have built it with (at least) x86_64-linux-user,x86_64-softmmu in your -target-list for these examples, or if using your distro's package, you'll need the qemu-x86_64 and qemu-system-x86_64 binaries. For this entry we will be using QEMU 3.0, compiled from source with gcc -O3 -mcpu=power9. In prior articles we've used QEMU with KVMPPC to emulate virtual Power Macs and IBM pSeries, but this time around we'll exclusively use its TCG JITted software CPU emulation to run x86_64 programs and evaluate their performance on the Talos II. There's a lot of software for Intel processors, and there's a lot of it that you can't recompile, so once in awhile you've got to get a little dirty to run what you need to. Yes, it's gross, but sometimes it's necessary. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |