[libvirt] [PATCH v3 3/9] qemu: Implement the qemu driver fetch for IOThreads
Ján Tomko
jtomko at redhat.com
Thu Mar 5 16:26:23 UTC 2015
On Thu, Mar 05, 2015 at 07:51:33AM -0500, John Ferlan wrote:
> >> + for (i = 0; i < targetDef->iothreads; i++) {
> >> + if (VIR_ALLOC(info_ret[i]) < 0)
> >> + goto cleanup;
> >> +
> >> + /* IOThreads being counting at 1 */
> >> + info_ret[i]->iothread_id = i + 1;
> >> +
> >> + if (VIR_ALLOC_N(info_ret[i]->cpumap, maplen) < 0)
> >> + goto cleanup;
> >> +
> >> + /* Initialize the cpumap */
> >> + info_ret[i]->cpumaplen = maplen;
> >> + memset(info_ret[i]->cpumap, 0xff, maplen);
> >> + if (maxcpu % 8)
> >> + info_ret[i]->cpumap[maplen - 1] &= (1 << maxcpu % 8) - 1;
> >
> > virBitmapToData could make this more readable.
> >
>
> This is where I'm not sure varying from the existing API's model w/r/t
> cpumap & maplen, etc. should be done..
>
Yes, virBitmapToData converts it from the virBitmap format used by
theiothreadspin info to the cpumap/maplen format matching the API you
proposed.
> >> + }
> >> +
> >> + /* If iothreadspin setting exists, there are unused physical cpus */
> >> + iothreadspin_list = targetDef->cputune.iothreadspin;
> >
> > A temporary variable pointing to iothreadspin[i] is more common.
> >
>
> straight copy of qemuDomainGetVcpuPinInfo
>
Oh, that explains it.
Jan
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