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authorLinas Vepstas <linas@linas.org>2005-11-03 18:48:52 -0600
committerPaul Mackerras <paulus@samba.org>2005-11-10 11:33:11 +1100
commit177bc9367efe89a642bc9a07351726fd2c31f5ff (patch)
tree04bdde1e9171766f9f46a0adbf2cc5f06691496f /arch/ppc64/kernel
parent56b0fca3a008ddec8c00cfdddbef17bd9ce188e3 (diff)
[PATCH] ppc64: PCI error rate statistics
04-eeh-statistics.patch This minor patch adds some statistics-gathering counters that allow the behaviour of the EEH subsystem o be monitored. While far from perfect, it does provide a rudimentary device that makes understanding of the current state of the system a bit easier. Signed-off-by: Linas Vepstas <linas@linas.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/ppc64/kernel')
-rw-r--r--arch/ppc64/kernel/eeh.c43
1 files changed, 32 insertions, 11 deletions
diff --git a/arch/ppc64/kernel/eeh.c b/arch/ppc64/kernel/eeh.c
index 99f11b66b5a..926d3110dfd 100644
--- a/arch/ppc64/kernel/eeh.c
+++ b/arch/ppc64/kernel/eeh.c
@@ -102,6 +102,10 @@ static DEFINE_SPINLOCK(slot_errbuf_lock);
static int eeh_error_buf_size;
/* System monitoring statistics */
+static DEFINE_PER_CPU(unsigned long, no_device);
+static DEFINE_PER_CPU(unsigned long, no_dn);
+static DEFINE_PER_CPU(unsigned long, no_cfg_addr);
+static DEFINE_PER_CPU(unsigned long, ignored_check);
static DEFINE_PER_CPU(unsigned long, total_mmio_ffs);
static DEFINE_PER_CPU(unsigned long, false_positives);
static DEFINE_PER_CPU(unsigned long, ignored_failures);
@@ -493,8 +497,6 @@ static void eeh_event_handler(void *dummy)
notifier_call_chain (&eeh_notifier_chain,
EEH_NOTIFY_FREEZE, event);
- __get_cpu_var(slot_resets)++;
-
pci_dev_put(event->dev);
kfree(event);
}
@@ -546,17 +548,24 @@ int eeh_dn_check_failure(struct device_node *dn, struct pci_dev *dev)
if (!eeh_subsystem_enabled)
return 0;
- if (!dn)
+ if (!dn) {
+ __get_cpu_var(no_dn)++;
return 0;
+ }
pdn = PCI_DN(dn);
/* Access to IO BARs might get this far and still not want checking. */
if (!pdn->eeh_capable || !(pdn->eeh_mode & EEH_MODE_SUPPORTED) ||
pdn->eeh_mode & EEH_MODE_NOCHECK) {
+ __get_cpu_var(ignored_check)++;
+#ifdef DEBUG
+ printk ("EEH:ignored check for %s %s\n", pci_name (dev), dn->full_name);
+#endif
return 0;
}
if (!pdn->eeh_config_addr) {
+ __get_cpu_var(no_cfg_addr)++;
return 0;
}
@@ -590,6 +599,7 @@ int eeh_dn_check_failure(struct device_node *dn, struct pci_dev *dev)
/* prevent repeated reports of this failure */
pdn->eeh_mode |= EEH_MODE_ISOLATED;
+ __get_cpu_var(slot_resets)++;
reset_state = rets[0];
@@ -657,8 +667,10 @@ unsigned long eeh_check_failure(const volatile void __iomem *token, unsigned lon
/* Finding the phys addr + pci device; this is pretty quick. */
addr = eeh_token_to_phys((unsigned long __force) token);
dev = pci_get_device_by_addr(addr);
- if (!dev)
+ if (!dev) {
+ __get_cpu_var(no_device)++;
return val;
+ }
dn = pci_device_to_OF_node(dev);
eeh_dn_check_failure (dn, dev);
@@ -903,12 +915,17 @@ static int proc_eeh_show(struct seq_file *m, void *v)
unsigned int cpu;
unsigned long ffs = 0, positives = 0, failures = 0;
unsigned long resets = 0;
+ unsigned long no_dev = 0, no_dn = 0, no_cfg = 0, no_check = 0;
for_each_cpu(cpu) {
ffs += per_cpu(total_mmio_ffs, cpu);
positives += per_cpu(false_positives, cpu);
failures += per_cpu(ignored_failures, cpu);
resets += per_cpu(slot_resets, cpu);
+ no_dev += per_cpu(no_device, cpu);
+ no_dn += per_cpu(no_dn, cpu);
+ no_cfg += per_cpu(no_cfg_addr, cpu);
+ no_check += per_cpu(ignored_check, cpu);
}
if (0 == eeh_subsystem_enabled) {
@@ -916,13 +933,17 @@ static int proc_eeh_show(struct seq_file *m, void *v)
seq_printf(m, "eeh_total_mmio_ffs=%ld\n", ffs);
} else {
seq_printf(m, "EEH Subsystem is enabled\n");
- seq_printf(m, "eeh_total_mmio_ffs=%ld\n"
- "eeh_false_positives=%ld\n"
- "eeh_ignored_failures=%ld\n"
- "eeh_slot_resets=%ld\n"
- "eeh_fail_count=%d\n",
- ffs, positives, failures, resets,
- eeh_fail_count.counter);
+ seq_printf(m,
+ "no device=%ld\n"
+ "no device node=%ld\n"
+ "no config address=%ld\n"
+ "check not wanted=%ld\n"
+ "eeh_total_mmio_ffs=%ld\n"
+ "eeh_false_positives=%ld\n"
+ "eeh_ignored_failures=%ld\n"
+ "eeh_slot_resets=%ld\n",
+ no_dev, no_dn, no_cfg, no_check,
+ ffs, positives, failures, resets);
}
return 0;