[POWERPC] spufs: Add spu stats in sysfs
Export spu statistics in sysfs.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
diff --git a/arch/powerpc/platforms/cell/spu_base.c b/arch/powerpc/platforms/cell/spu_base.c
index 174bd9f..e4d0c9f 100644
--- a/arch/powerpc/platforms/cell/spu_base.c
+++ b/arch/powerpc/platforms/cell/spu_base.c
@@ -585,6 +585,9 @@
spin_unlock_irqrestore(&spu_list_lock, flags);
mutex_unlock(&spu_mutex);
+ spu->stats.utilization_state = SPU_UTIL_IDLE;
+ spu->stats.tstamp = jiffies;
+
goto out;
out_free_irqs:
@@ -597,6 +600,45 @@
return ret;
}
+static const char *spu_state_names[] = {
+ "user", "system", "iowait", "idle"
+};
+
+static unsigned long long spu_acct_time(struct spu *spu,
+ enum spu_utilization_state state)
+{
+ unsigned long long time = spu->stats.times[state];
+
+ if (spu->stats.utilization_state == state)
+ time += jiffies - spu->stats.tstamp;
+
+ return jiffies_to_msecs(time);
+}
+
+
+static ssize_t spu_stat_show(struct sys_device *sysdev, char *buf)
+{
+ struct spu *spu = container_of(sysdev, struct spu, sysdev);
+
+ return sprintf(buf, "%s %llu %llu %llu %llu "
+ "%llu %llu %llu %llu %llu %llu %llu %llu\n",
+ spu_state_names[spu->stats.utilization_state],
+ spu_acct_time(spu, SPU_UTIL_USER),
+ spu_acct_time(spu, SPU_UTIL_SYSTEM),
+ spu_acct_time(spu, SPU_UTIL_IOWAIT),
+ spu_acct_time(spu, SPU_UTIL_IDLE),
+ spu->stats.vol_ctx_switch,
+ spu->stats.invol_ctx_switch,
+ spu->stats.slb_flt,
+ spu->stats.hash_flt,
+ spu->stats.min_flt,
+ spu->stats.maj_flt,
+ spu->stats.class2_intr,
+ spu->stats.libassist);
+}
+
+static SYSDEV_ATTR(stat, 0644, spu_stat_show, NULL);
+
static int __init init_spu_base(void)
{
int i, ret = 0;
@@ -622,6 +664,8 @@
xmon_register_spus(&spu_full_list);
+ spu_add_sysdev_attr(&attr_stat);
+
return 0;
out_unregister_sysdev_class: