diff options
| author | Andrew Morton <akpm@osdl.org> | 2004-05-09 23:24:05 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2004-05-09 23:24:05 -0700 |
| commit | b45bb3397e0f2e7de0301d1ebc8ed53bfdea5ebf (patch) | |
| tree | 1421304e22d267a0ea871aca4a75c526ccf15924 /kernel | |
| parent | 8c136f71934b05aebb7ffb9631415b74f0906bad (diff) | |
| download | history-b45bb3397e0f2e7de0301d1ebc8ed53bfdea5ebf.tar.gz | |
[PATCH] sched_domain debugging
From: Nick Piggin <piggin@cyberone.com.au>
Anton was attempting to make a sched domain topology for his POWER5 and was
having some trouble.
This patch only includes code which is ifdefed out, but hopefully it will
be of some use to implementors.
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/sched.c | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/kernel/sched.c b/kernel/sched.c index abbfb779e5eee8..b3db2b977d76d7 100644 --- a/kernel/sched.c +++ b/kernel/sched.c @@ -3395,9 +3395,87 @@ static void __init arch_init_sched_domains(void) #endif /* CONFIG_NUMA */ #endif /* ARCH_HAS_SCHED_DOMAIN */ +#undef SCHED_DOMAIN_DEBUG +#ifdef SCHED_DOMAIN_DEBUG +void sched_domain_debug(void) +{ + int i; + + for_each_cpu(i) { + int level = 0; + struct sched_domain *cpu_domain = cpu_sched_domain(i); + + printk(KERN_DEBUG "CPU%d: %s\n", + i, (cpu_online(i) ? " online" : "offline")); + + do { + int j; + char str[NR_CPUS]; + struct sched_group *group = cpu_domain->groups; + cpumask_t groupmask, tmp; + + cpumask_snprintf(str, NR_CPUS, cpu_domain->span); + cpus_clear(groupmask); + + printk(KERN_DEBUG); + for (j = 0; j < level + 1; j++) + printk(" "); + printk("domain %d: span %s\n", level, str); + + if (!cpu_isset(i, cpu_domain->span)) + printk(KERN_DEBUG "ERROR domain->span does not contain CPU%d\n", i); + if (!cpu_isset(i, group->cpumask)) + printk(KERN_DEBUG "ERROR domain->groups does not contain CPU%d\n", i); + + printk(KERN_DEBUG); + for (j = 0; j < level + 2; j++) + printk(" "); + printk("groups:"); + do { + if (group == NULL) { + printk(" ERROR: NULL"); + break; + } + + if (cpus_weight(group->cpumask) == 0) + printk(" ERROR empty group:"); + + cpus_and(tmp, groupmask, group->cpumask); + if (cpus_weight(tmp) > 0) + printk(" ERROR repeated CPUs:"); + + cpus_or(groupmask, groupmask, group->cpumask); + + cpumask_snprintf(str, NR_CPUS, group->cpumask); + printk(" %s", str); + + group = group->next; + } while (group != cpu_domain->groups); + printk("\n"); + + if (!cpus_equal(cpu_domain->span, groupmask)) + printk(KERN_DEBUG "ERROR groups don't span domain->span\n"); + + level++; + cpu_domain = cpu_domain->parent; + + if (cpu_domain) { + cpus_and(tmp, groupmask, cpu_domain->span); + if (!cpus_equal(tmp, groupmask)) + printk(KERN_DEBUG "ERROR parent span is not a superset of domain->span\n"); + } + + } while (cpu_domain); + } +} +#else +#define sched_domain_debug() {} +#endif + void __init sched_init_smp(void) { arch_init_sched_domains(); + sched_domain_debug(); } #else void __init sched_init_smp(void) |