sched_ule(4): Pre-seed sched_random().
I don't think it changes anything, but why not. While there, make cpu_search_highest() use all 8 lower load bits for noise, since it does not use cs_prefer and the code is not shared with cpu_search_lowest() any more. MFC after: 1 month
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@ -739,7 +739,7 @@ cpu_search_highest(const struct cpu_group *cg, const struct cpu_search *s,
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if (l < s->cs_limit || !tdq->tdq_transferable ||
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!CPU_ISSET(c, s->cs_mask))
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continue;
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load -= sched_random() % 128;
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load -= sched_random() % 256;
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if (load > bload) {
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bload = load;
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r->cs_cpu = c;
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@ -1416,6 +1416,7 @@ sched_setup_smp(void)
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tdq->tdq_cg = smp_topo_find(cpu_top, i);
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if (tdq->tdq_cg == NULL)
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panic("Can't find cpu group for %d\n", i);
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DPCPU_ID_SET(i, randomval, i * 69069 + 5);
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}
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PCPU_SET(sched, DPCPU_PTR(tdq));
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balance_tdq = TDQ_SELF();
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