sgi-gru: add statistics to the GRU context management functions
Add statistics to the GRU context management functions. Signed-off-by: Jack Steiner <steiner@sgi.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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@ -35,6 +35,16 @@
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/* Extract the status field from a kernel handle */
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#define GET_MSEG_HANDLE_STATUS(h) (((*(unsigned long *)(h)) >> 16) & 3)
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struct mcs_op_statistic mcs_op_statistics[mcsop_last];
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static void update_mcs_stats(enum mcs_op op, unsigned long clks)
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{
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atomic_long_inc(&mcs_op_statistics[op].count);
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atomic_long_add(clks, &mcs_op_statistics[op].total);
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if (mcs_op_statistics[op].max < clks)
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mcs_op_statistics[op].max = clks;
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}
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static void start_instruction(void *h)
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{
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unsigned long *w0 = h;
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@ -57,6 +67,8 @@ static int wait_instruction_complete(void *h, enum mcs_op opc)
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if (GRU_OPERATION_TIMEOUT < (get_cycles() - start_time))
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panic("GRU %p is malfunctioning\n", h);
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}
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if (gru_options & OPT_STATS)
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update_mcs_stats(opc, get_cycles() - start_time);
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return status;
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}
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@ -122,6 +122,30 @@ static ssize_t statistics_write(struct file *file, const char __user *userbuf,
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return count;
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}
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static int mcs_statistics_show(struct seq_file *s, void *p)
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{
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int op;
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unsigned long total, count, max;
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static char *id[] = {"cch_allocate", "cch_start", "cch_interrupt",
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"cch_interrupt_sync", "cch_deallocate", "tgh_invalidate"};
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for (op = 0; op < mcsop_last; op++) {
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count = atomic_long_read(&mcs_op_statistics[op].count);
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total = atomic_long_read(&mcs_op_statistics[op].total);
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max = mcs_op_statistics[op].max;
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seq_printf(s, "%-20s%12ld%12ld%12ld\n", id[op], count,
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count ? total / count : 0, max);
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}
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return 0;
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}
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static ssize_t mcs_statistics_write(struct file *file,
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const char __user *userbuf, size_t count, loff_t *data)
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{
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memset(mcs_op_statistics, 0, sizeof(mcs_op_statistics));
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return count;
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}
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static int options_show(struct seq_file *s, void *p)
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{
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seq_printf(s, "0x%lx\n", gru_options);
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@ -137,6 +161,7 @@ static ssize_t options_write(struct file *file, const char __user *userbuf,
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if (copy_from_user
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(buf, userbuf, count < sizeof(buf) ? count : sizeof(buf)))
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return -EFAULT;
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buf[count - 1] = '\0';
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if (!strict_strtoul(buf, 10, &val))
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gru_options = val;
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@ -233,6 +258,11 @@ static int statistics_open(struct inode *inode, struct file *file)
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return single_open(file, statistics_show, NULL);
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}
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static int mcs_statistics_open(struct inode *inode, struct file *file)
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{
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return single_open(file, mcs_statistics_show, NULL);
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}
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static int options_open(struct inode *inode, struct file *file)
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{
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return single_open(file, options_show, NULL);
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@ -257,6 +287,14 @@ static const struct file_operations statistics_fops = {
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.release = single_release,
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};
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static const struct file_operations mcs_statistics_fops = {
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.open = mcs_statistics_open,
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.read = seq_read,
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.write = mcs_statistics_write,
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.llseek = seq_lseek,
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.release = single_release,
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};
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static const struct file_operations options_fops = {
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.open = options_open,
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.read = seq_read,
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@ -285,6 +323,7 @@ static struct proc_entry {
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struct proc_dir_entry *entry;
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} proc_files[] = {
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{"statistics", 0644, &statistics_fops},
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{"mcs_statistics", 0644, &mcs_statistics_fops},
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{"debug_options", 0644, &options_fops},
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{"cch_status", 0444, &cch_fops},
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{"gru_status", 0444, &gru_fops},
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@ -242,6 +242,14 @@ struct gru_stats_s {
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enum mcs_op {cchop_allocate, cchop_start, cchop_interrupt, cchop_interrupt_sync,
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cchop_deallocate, tghop_invalidate, mcsop_last};
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struct mcs_op_statistic {
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atomic_long_t count;
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atomic_long_t total;
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unsigned long max;
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};
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extern struct mcs_op_statistic mcs_op_statistics[mcsop_last];
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#define OPT_DPRINT 1
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#define OPT_STATS 2
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#define GRU_QUICKLOOK 4
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