From: Mike Kravetz <kravetz@us•ibm.com>
To: Paul Mackerras <paulus@samba•org>
Cc: linuxppc-dev@ozlabs•org
Subject: [PATCH 3/3] powerpc: Instrument Hypervisor Calls: add debugfs file
Date: Thu, 20 Jul 2006 23:49:31 -0700 [thread overview]
Message-ID: <20060721064931.GF8639@monkey.ibm.com> (raw)
In-Reply-To: <20060721063824.GA8639@monkey.ibm.com>
Make statistics available via files in debugfs.
--
Signed-off-by: Mike Kravetz <kravetz@us•ibm.com>
diff -Naupr powerpc/arch/powerpc/platforms/pseries/hvCall_inst.c powerpc.work/arch/powerpc/platforms/pseries/hvCall_inst.c
--- powerpc/arch/powerpc/platforms/pseries/hvCall_inst.c 2006-07-21 07:10:08.000000000 +0000
+++ powerpc.work/arch/powerpc/platforms/pseries/hvCall_inst.c 2006-07-21 07:11:00.000000000 +0000
@@ -42,3 +42,96 @@ void update_hcall_stats(unsigned long op
hs->purr_total += purr_delta;
hs->num_calls++;
}
+
+/*
+ * Routines for displaying the statistics in debugfs
+ */
+static void *hc_start(struct seq_file *m, loff_t *pos)
+{
+ if ((int)*pos < MAX_HCALL_OPCODES)
+ return (void *)(unsigned long)(*pos + 1);
+
+ return NULL;
+}
+
+static void *hc_next(struct seq_file *m, void *p, loff_t * pos)
+{
+ ++*pos;
+
+ return hc_start(m, pos);
+}
+
+static void hc_stop(struct seq_file *m, void *p)
+{
+}
+
+static int hc_show(struct seq_file *m, void *p)
+{
+ unsigned long h_num = (unsigned long)p;
+ struct hcall_stats *hs = (struct hcall_stats *)m->private;
+
+ if (hs[h_num].num_calls)
+ seq_printf(m, "%lu %lu %lu %lu\n", h_num<<2,
+ hs[h_num].num_calls,
+ hs[h_num].tb_total,
+ hs[h_num].purr_total);
+
+ return 0;
+}
+
+static struct seq_operations hcall_inst_seq_ops = {
+ .start = hc_start,
+ .next = hc_next,
+ .stop = hc_stop,
+ .show = hc_show
+};
+
+static int hcall_inst_seq_open(struct inode *inode, struct file *file)
+{
+ int rc;
+ struct seq_file *seq;
+
+ rc = seq_open(file, &hcall_inst_seq_ops);
+ seq = file->private_data;
+ seq->private = file->f_dentry->d_inode->u.generic_ip;
+
+ return rc;
+}
+
+static struct file_operations hcall_inst_seq_fops = {
+ .open = hcall_inst_seq_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release,
+};
+
+#define HCALL_ROOT_DIR "hcall_inst"
+#define CPU_NAME_BUF_SIZE 32
+
+static int __init hcall_inst_init(void)
+{
+ struct dentry *hcall_root;
+ struct dentry *hcall_file;
+ char cpu_name_buf[CPU_NAME_BUF_SIZE];
+ int cpu;
+
+ if (!firmware_has_feature(FW_FEATURE_LPAR))
+ return 0;
+
+ hcall_root = debugfs_create_dir(HCALL_ROOT_DIR, NULL);
+ if (!hcall_root)
+ return -ENOMEM;
+
+ for_each_possible_cpu(cpu) {
+ snprintf(cpu_name_buf, CPU_NAME_BUF_SIZE, "cpu%d", cpu);
+ hcall_file = debugfs_create_file(cpu_name_buf, S_IRUGO,
+ hcall_root,
+ per_cpu(hcall_stats, cpu),
+ &hcall_inst_seq_fops);
+ if (!hcall_file)
+ return -ENOMEM;
+ }
+
+ return 0;
+}
+__initcall(hcall_inst_init);
prev parent reply other threads:[~2006-07-21 6:49 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-07-21 6:38 [PATCH 0/3] powerpc: Instrument Hypervisor Calls Mike Kravetz
2006-07-21 6:39 ` [PATCH 1/3] powerpc: Instrument Hypervisor Calls: merge headers Mike Kravetz
2006-07-21 12:14 ` Stephen Rothwell
2006-07-21 6:41 ` [PATCH 2/3] powerpc: Instrument Hypervisor Calls: add instrumentation Mike Kravetz
2006-07-21 6:48 ` Mike Kravetz
2006-07-21 6:49 ` Mike Kravetz [this message]
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