"Richard W.M. Jones" <rjones@xxxxxxxxxx> writes: > On Thu, Jul 30, 2020 at 11:46:08AM -0400, Robbie Harwood wrote: >> Aleksandra Fedorova <alpha@xxxxxxxxxxxx> writes: >> >>> As COPR has recently got support for s390 builds, the question is: >>> if emulation is good enough for building packages, can we use it for >>> testing? What are the limitations there? Is it worth it? >> >> Cross-architecture emulation is unbelievably slow in the general >> case. While it helps for some specific use cases, it's not a >> substitute for actually getting hardware. > > Since qemu TCG now supports host thread per vCPU you can usually throw > lots of vCPUs at the problem, assuming your builds can be parallelised > and your x86 hardware has plenty of cores. That's good to know, and definitely I could see that helping with builds themselves, but won't help with many (most?) test suites :) Thanks, --Robbie
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