patch-2.1.100 linux/fs/coda/stats.c

• Lines: 417
• Date: Tue May 5 10:52:17 1998
• Orig file: v2.1.99/linux/fs/coda/stats.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.1.99/linux/fs/coda/stats.c linux/fs/coda/stats.c
@@ -0,0 +1,416 @@
+/*
+ * stats.c
+ * 
+ * CODA operation statistics
+ *
+ * (c) March, 1998 Zhanyong Wan <zhanyong.wan@yale.edu>
+ *
+ */
+
+#include <linux/sched.h>
+#include <linux/mm.h>
+#include <linux/sysctl.h>
+#include <linux/swapctl.h>
+#include <linux/proc_fs.h>
+#include <linux/malloc.h>
+#include <linux/stat.h>
+#include <linux/ctype.h>
+#include <asm/bitops.h>
+#include <asm/segment.h>
+#include <asm/uaccess.h>
+#include <linux/utsname.h>
+
+#include <linux/coda.h>
+#include <linux/coda_linux.h>
+#include <linux/coda_fs_i.h>
+#include <linux/coda_psdev.h>
+#include <linux/coda_cache.h>
+#include <linux/coda_proc.h>
+
+struct coda_vfs_stats		coda_vfs_stat;
+struct coda_permission_stats	coda_permission_stat;
+struct coda_cache_inv_stats	coda_cache_inv_stat;
+struct coda_upcall_stats_entry coda_upcall_stat[CFS_NCALLS];
+
+/* keep this in sync with coda.h! */
+char *coda_upcall_names[] = {
+	"totals      ",   /*  0 */
+	"noop        ",   /*  1 */
+	"root        ",   /*  2 */
+	"sync        ",   /*  3 */
+	"open        ",   /*  4 */
+	"close       ",   /*  5 */
+	"ioctl       ",   /*  6 */
+	"getattr     ",   /*  7 */
+	"setattr     ",   /*  8 */
+	"access      ",   /*  9 */
+	"lookup      ",   /* 10 */
+	"create      ",   /* 11 */
+	"remove      ",   /* 12 */
+	"link        ",   /* 13 */
+	"rename      ",   /* 14 */
+	"mkdir       ",   /* 15 */
+	"rmdir       ",   /* 16 */
+	"readdir     ",   /* 17 */
+	"symlink     ",   /* 18 */
+	"readlink    ",   /* 19 */
+	"fsync       ",   /* 20 */
+	"inactive    ",   /* 21 */
+	"vget        ",   /* 22 */
+	"signal      ",   /* 23 */
+	"replace     ",   /* 24 */
+	"flush       ",   /* 25 */
+	"purgeuser   ",   /* 26 */
+	"zapfile     ",   /* 27 */
+	"zapdir      ",   /* 28 */
+	"zapvnode    ",   /* 28 */
+	"purgefid    ",   /* 30 */
+	"open_by_path"    /* 31 */
+};
+
+
+
+
+void reset_coda_vfs_stats( void )
+{
+	memset( &coda_vfs_stat, 0, sizeof( coda_vfs_stat ) );
+}
+
+#if 0
+static void reset_upcall_entry( struct coda_upcall_stats_entry * pentry )
+{
+	pentry->count = 0;
+	pentry->time_sum = pentry->time_squared_sum = 0;
+}
+#endif
+
+void reset_coda_upcall_stats( void )
+{
+	memset( &coda_upcall_stat, 0, sizeof( coda_upcall_stat ) );
+}
+
+void reset_coda_permission_stats( void )
+{
+	memset( &coda_permission_stat, 0, sizeof( coda_permission_stat ) );
+}
+
+void reset_coda_cache_inv_stats( void )
+{
+	memset( &coda_cache_inv_stat, 0, sizeof( coda_cache_inv_stat ) );
+}
+
+
+void do_time_stats( struct coda_upcall_stats_entry * pentry, 
+		    unsigned long runtime )
+{
+	
+	unsigned long time = runtime * 1000 /HZ;	/* time in ms */
+	CDEBUG(D_SPECIAL, "time: %ld\n", time);
+
+	if ( pentry->count == 0 ) {
+		pentry->time_sum = pentry->time_squared_sum = 0;
+	}
+	
+	pentry->count++;
+	pentry->time_sum += time;
+	pentry->time_squared_sum += time*time;
+}
+
+
+
+void coda_upcall_stats(int opcode, long unsigned runtime) 
+{
+	struct coda_upcall_stats_entry * pentry;
+	
+	if ( opcode < 0 || opcode > CFS_NCALLS - 1) {
+		printk("Nasty opcode %d passed to coda_upcall_stats\n",
+		       opcode);
+		return;
+	}
+		
+	pentry = &coda_upcall_stat[opcode];
+	do_time_stats(pentry, runtime);
+
+        /* fill in the totals */
+	pentry = &coda_upcall_stat[0];
+	do_time_stats(pentry, runtime);
+
+}
+
+unsigned long get_time_average( const struct coda_upcall_stats_entry * pentry )
+{
+	return ( pentry->count == 0 ) ? 0 : pentry->time_sum / pentry->count;
+}
+
+static inline unsigned long absolute( unsigned long x )
+{
+	return x >= 0 ? x : -x;
+}
+
+static unsigned long sqr_root( unsigned long x )
+{
+	unsigned long y = x, r;
+	int n_bit = 0;
+  
+	if ( x == 0 )
+		return 0;
+	if ( x < 0)
+		x = -x;
+
+	while ( y ) {
+		y >>= 1;
+		n_bit++;
+	}
+  
+	r = 1 << (n_bit/2);
+  
+	while ( 1 ) {
+		r = (r + x/r)/2;
+		if ( r*r <= x && x < (r+1)*(r+1) )
+			break;
+	}
+  
+	return r;
+}
+
+unsigned long get_time_std_deviation( const struct coda_upcall_stats_entry * pentry )
+{
+	unsigned long time_avg;
+  
+	if ( pentry->count <= 1 )
+		return 0;
+  
+	time_avg = get_time_average( pentry );
+	return 
+	        sqr_root( (pentry->time_squared_sum / pentry->count) - 
+			    time_avg * time_avg );
+}
+
+int do_reset_coda_vfs_stats( ctl_table * table, int write, struct file * filp,
+			     void * buffer, size_t * lenp )
+{
+	if ( write ) {
+		reset_coda_vfs_stats();
+	}
+  
+	*lenp = 0;
+	return 0;
+}
+
+int do_reset_coda_upcall_stats( ctl_table * table, int write, 
+				struct file * filp, void * buffer, 
+				size_t * lenp )
+{
+	if ( write ) {
+		reset_coda_upcall_stats();
+	}
+  
+	*lenp = 0;
+	return 0;
+}
+
+int do_reset_coda_permission_stats( ctl_table * table, int write, 
+				    struct file * filp, void * buffer, 
+				    size_t * lenp )
+{
+	if ( write ) {
+		reset_coda_permission_stats();
+	}
+  
+	*lenp = 0;
+	return 0;
+}
+
+int do_reset_coda_cache_inv_stats( ctl_table * table, int write, 
+				   struct file * filp, void * buffer, 
+				   size_t * lenp )
+{
+	if ( write ) {
+		reset_coda_cache_inv_stats();
+	}
+  
+	*lenp = 0;
+	return 0;
+}
+
+int coda_vfs_stats_get_info( char * buffer, char ** start, off_t offset,
+			     int length, int dummy )
+{
+	int len=0;
+	off_t begin;
+	struct coda_vfs_stats * ps = & coda_vfs_stat;
+  
+  /* this works as long as we are below 1024 characters! */
+	len += sprintf( buffer,
+			"Coda VFS statistics\n"
+			"===================\n\n"
+			"File Operations:\n"
+			"\tfile_read\t%9d\n"
+			"\tfile_write\t%9d\n"
+			"\tfile_mmap\t%9d\n"
+			"\topen\t\t%9d\n"
+			"\trelase\t\t%9d\n"
+			"\tfsync\t\t%9d\n\n"
+			"Dir Operations:\n"
+			"\treaddir\t\t%9d\n\n"
+			"Inode Operations\n"
+			"\tcreate\t\t%9d\n"
+			"\tlookup\t\t%9d\n"
+			"\tlink\t\t%9d\n"
+			"\tunlink\t\t%9d\n"
+			"\tsymlink\t\t%9d\n"
+			"\tmkdir\t\t%9d\n"
+			"\trmdir\t\t%9d\n"
+			"\trename\t\t%9d\n"
+			"\tpermission\t%9d\n"
+			"\treadpage\t%9d\n",
+
+			/* file operations */
+			ps->file_read,
+			ps->file_write,
+			ps->file_mmap,
+			ps->open,
+			ps->release,
+			ps->fsync,
+
+			/* dir operations */
+			ps->readdir,
+		  
+			/* inode operations */
+			ps->create,
+			ps->lookup,
+			ps->link,
+			ps->unlink,
+			ps->symlink,
+			ps->mkdir,
+			ps->rmdir,
+			ps->rename,
+			ps->permission,
+			ps->readpage );
+  
+	begin = offset;
+	*start = buffer + begin;
+	len -= begin;
+
+	if ( len > length )
+		len = length;
+	if ( len < 0 )
+		len = 0;
+
+	return len;
+}
+
+int coda_upcall_stats_get_info( char * buffer, char ** start, off_t offset,
+				int length, int dummy )
+{
+	int len=0;
+	int i;
+	off_t begin;
+	off_t pos = 0;
+	char tmpbuf[80];
+	int tmplen = 0;
+
+	ENTRY;
+	/* this works as long as we are below 1024 characters! */
+	if ( offset < 80 ) 
+		len += sprintf( buffer,"%-79s\n",	"Coda upcall statistics");
+	if ( offset < 160) 
+		len += sprintf( buffer + len,"%-79s\n",	"======================");
+	if ( offset < 240) 
+		len += sprintf( buffer + len,"%-79s\n",	"upcall\t\t    count\tavg time(ms)\tstd deviation(ms)");
+	if ( offset < 320) 
+		len += sprintf( buffer + len,"%-79s\n",	"------\t\t    -----\t------------\t-----------------");
+	pos = 320; 
+	for ( i = 0 ; i < CFS_NCALLS ; i++ ) {
+		tmplen += sprintf(tmpbuf,"%s\t%9d\t%10ld\t%10ld", 
+				  coda_upcall_names[i],
+				  coda_upcall_stat[i].count, 
+				  get_time_average(&coda_upcall_stat[i]),
+				  coda_upcall_stat[i].time_squared_sum);
+		pos += 80;
+		if ( pos < offset ) 
+			continue; 
+		len += sprintf(buffer + len, "%-79s\n", tmpbuf);
+		if ( len >= length ) 
+			break; 
+	}
+  
+	begin = len- (pos - offset);
+	*start = buffer + begin;
+	len -= begin;
+
+	if ( len > length )
+		len = length;
+	if ( len < 0 )
+		len = 0;
+	EXIT;
+	return len;
+}
+
+int coda_permission_stats_get_info( char * buffer, char ** start, off_t offset,
+				    int length, int dummy )
+{
+	int len=0;
+	off_t begin;
+	struct coda_permission_stats * ps = & coda_permission_stat;
+  
+	/* this works as long as we are below 1024 characters! */
+	len += sprintf( buffer,
+			"Coda permission statistics\n"
+			"==========================\n\n"
+			"count\t\t%9d\n"
+			"hit count\t%9d\n",
+
+			ps->count,
+			ps->hit_count );
+  
+	begin = offset;
+	*start = buffer + begin;
+	len -= begin;
+
+	if ( len > length )
+		len = length;
+	if ( len < 0 )
+		len = 0;
+
+	return len;
+}
+
+int coda_cache_inv_stats_get_info( char * buffer, char ** start, off_t offset,
+				   int length, int dummy )
+{
+	int len=0;
+	off_t begin;
+	struct coda_cache_inv_stats * ps = & coda_cache_inv_stat;
+  
+	/* this works as long as we are below 1024 characters! */
+	len += sprintf( buffer,
+			"Coda cache invalidation statistics\n"
+			"==================================\n\n"
+			"flush\t\t%9d\n"
+			"purge user\t%9d\n"
+			"zap_dir\t\t%9d\n"
+			"zap_file\t%9d\n"
+			"zap_vnode\t%9d\n"
+			"purge_fid\t%9d\n"
+			"replace\t\t%9d\n",
+			ps->flush,
+			ps->purge_user,
+			ps->zap_dir,
+			ps->zap_file,
+			ps->zap_vnode,
+			ps->purge_fid,
+			ps->replace );
+  
+	begin = offset;
+	*start = buffer + begin;
+	len -= begin;
+
+	if ( len > length )
+		len = length;
+	if ( len < 0 )
+		len = 0;
+
+	return len;
+}
+