On Thu, Apr 21, 2005 at 03:32:39PM -0300, Marcelo Tosatti wrote:
> Capture session of /proc/tlbmiss with 1 second interval:
Forgot to attach /proc/tlbmiss patch, here it is.
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--- linux-216.orig/arch/ppc/kernel/head_8xx.S 2005-01-19 10:37:12.000000000
-0200
+++ linux-216/arch/ppc/kernel/head_8xx.S 2005-03-04 18:56:38.351004576
-0300
@@ -331,10 +331,21 @@
* kernel page tables.
*/
andi. r21, r20, 0x0800 /* Address >= 0x80000000 */
- beq 3f
+ beq 4f
lis r21, swapper_pg_dir at h
ori r21, r21, swapper_pg_dir at l
rlwimi r20, r21, 0, 2, 19
+
+ lis r3,(itlbkernel_miss-KERNELBASE)@ha
+ lwz r11,(itlbkernel_miss-KERNELBASE)@l(r3)
+ addi r11,r11,1
+ stw r11,(itlbkernel_miss-KERNELBASE)@l(r3)
+ beq 3f
+4:
+ lis r3,(itlbuser_miss-KERNELBASE)@ha
+ lwz r11,(itlbuser_miss-KERNELBASE)@l(r3)
+ addi r11,r11,1
+ stw r11,(itlbuser_miss-KERNELBASE)@l(r3)
3:
lwz r21, 0(r20) /* Get the level 1 entry */
rlwinm. r20, r21,0,0,19 /* Extract page descriptor page address */
@@ -414,10 +425,23 @@
* kernel page tables.
*/
andi. r21, r20, 0x0800
- beq 3f
+ beq 4f
lis r21, swapper_pg_dir at h
ori r21, r21, swapper_pg_dir at l
rlwimi r20, r21, 0, 2, 19
+
+ lis r3,(dtlbkernel_miss-KERNELBASE)@ha
+ lwz r11,(dtlbkernel_miss-KERNELBASE)@l(r3)
+ addi r11,r11,1
+ stw r11,(dtlbkernel_miss-KERNELBASE)@l(r3)
+ beq 3f
+
+4:
+ lis r3,(dtlbuser_miss-KERNELBASE)@ha
+ lwz r11,(dtlbuser_miss-KERNELBASE)@l(r3)
+ addi r11,r11,1
+ stw r11,(dtlbuser_miss-KERNELBASE)@l(r3)
+
3:
lwz r21, 0(r20) /* Get the level 1 entry */
rlwinm. r20, r21,0,0,19 /* Extract page descriptor page address */
@@ -989,3 +1013,14 @@
.space 16
#endif
+_GLOBAL(itlbuser_miss)
+ .space 4
+
+_GLOBAL(itlbkernel_miss)
+ .space 4
+
+_GLOBAL(dtlbuser_miss)
+ .long 0
+
+_GLOBAL(dtlbkernel_miss)
+ .long 0
--- linux-216.orig/fs/proc/proc_misc.c 2005-01-19 10:37:12.000000000 -0200
+++ linux-216/fs/proc/proc_misc.c 2005-03-04 18:57:37.241051928 -0300
@@ -621,6 +621,12 @@
if (entry)
entry->proc_fops = &ppc_htab_operations;
}
+ {
+ extern struct file_operations ppc_tlbmiss_operations;
+ entry = create_proc_entry("tlbmiss", S_IRUGO|S_IWUSR, NULL);
+ if (entry)
+ entry->proc_fops = &ppc_tlbmiss_operations;
+ }
#endif
entry = create_proc_read_entry("slabinfo", S_IWUSR | S_IRUGO, NULL,
slabinfo_read_proc, NULL);
--- linux-216.orig/arch/ppc/kernel/ppc_htab.c 2005-01-19 10:37:12.000000000
-0200
+++ linux-216/arch/ppc/kernel/ppc_htab.c 2005-03-04 19:04:05.276061640
-0300
@@ -21,6 +21,7 @@
#include <linux/sysctl.h>
#include <linux/ctype.h>
#include <linux/threads.h>
+#include <linux/seq_file.h>
#include <asm/uaccess.h>
#include <asm/bitops.h>
@@ -32,6 +33,51 @@
#include <asm/cputable.h>
#include <asm/system.h>
+#if 1
+
+extern unsigned long itlbuser_miss, itlbkernel_miss;
+extern unsigned long dtlbuser_miss, dtlbkernel_miss;
+
+static ssize_t ppc_tlbmiss_write(struct file *file, const char * buffer,
+ size_t count, loff_t *ppos);
+static int ppc_tlbmiss_show(struct seq_file *m, void *v);
+static int ppc_tlbmiss_open(struct inode *inode, struct file *file);
+
+struct file_operations ppc_tlbmiss_operations = {
+ .open = ppc_tlbmiss_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .write = ppc_tlbmiss_write,
+ .release = seq_release,
+};
+
+static int ppc_tlbmiss_open(struct inode *inode, struct file *file)
+{
+ return seq_open(file, &ppc_tlbmiss_show);
+}
+
+static int ppc_tlbmiss_show(struct seq_file *m, void *v)
+{
+ seq_printf(m, "I-TLB userspace misses: %lu\n"
+ "I-TLB kernel misses: %lu\n"
+ "D-TLB userspace misses: %lu\n"
+ "D-TLB kernel misses: %lu\n",
+ itlbuser_miss, itlbkernel_miss,
+ dtlbuser_miss, dtlbkernel_miss);
+ return 0;
+}
+
+static ssize_t ppc_tlbmiss_write(struct file *file, const char * buffer,
+ size_t count, loff_t *ppos)
+{
+ itlbuser_miss = 0;
+ itlbkernel_miss = 0;
+ dtlbuser_miss = 0;
+ dtlbkernel_miss = 0;
+}
+#endif
+
+
static ssize_t ppc_htab_read(struct file * file, char * buf,
size_t count, loff_t *ppos);
static ssize_t ppc_htab_write(struct file * file, const char * buffer,
