Alternate patch to [PATCH] 5a/6: export 64 bit time values in /proc.
Per CPU user, nice, and system time currently overflow on alpha after
48.5 days respectively. Total values even overflow after
48.5 days / smp_num_cpus.
So make them 64 bit on 64 bit platforms.
Export 64 bit uptime on all platforms.
Calculate boot time correctly after 32 bit jiffies wrap.
--- linux-2.5.15-j65/include/linux/kernel_stat.h Sat May 11 13:57:38 2002
+++ linux-2.5.15-j66/include/linux/kernel_stat.h Sat May 11 13:49:10 2002
@@ -16,9 +16,9 @@
#define DK_MAX_DISK 16
struct kernel_stat {
- unsigned int per_cpu_user[NR_CPUS],
- per_cpu_nice[NR_CPUS],
- per_cpu_system[NR_CPUS];
+ unsigned long per_cpu_user[NR_CPUS],
+ per_cpu_nice[NR_CPUS],
+ per_cpu_system[NR_CPUS];
unsigned int dk_drive[DK_MAX_MAJOR][DK_MAX_DISK];
unsigned int dk_drive_rio[DK_MAX_MAJOR][DK_MAX_DISK];
unsigned int dk_drive_wio[DK_MAX_MAJOR][DK_MAX_DISK];
--- linux-2.5.15-j65/fs/proc/proc_misc.c Sat May 11 13:47:04 2002
+++ linux-2.5.15-j66/fs/proc/proc_misc.c Sat May 11 14:11:52 2002
@@ -40,6 +40,7 @@
#include <asm/uaccess.h>
#include <asm/pgtable.h>
#include <asm/io.h>
+#include <asm/div64.h>
#define LOAD_INT(x) ((x) >> FSHIFT)
@@ -93,11 +94,12 @@
static int uptime_read_proc(char *page, char **start, off_t off,
int count, int *eof, void *data)
{
- unsigned long uptime;
- unsigned long idle;
+ u64 uptime;
+ unsigned long uptime_remainder, idle;
int len;
- uptime = jiffies;
+ uptime = get_jiffies64();
+ uptime_remainder = (unsigned long) do_div(uptime, HZ);
idle = init_task.times.tms_utime + init_task.times.tms_stime;
/* The formula for the fraction parts really is ((t * 100) / HZ) % 100, but
@@ -111,14 +113,14 @@
*/
#if HZ!=100
len = sprintf(page,"%lu.%02lu %lu.%02lu\n",
- uptime / HZ,
- (((uptime % HZ) * 100) / HZ) % 100,
+ (unsigned long) uptime,
+ (uptime_remainder * 100) / HZ,
idle / HZ,
(((idle % HZ) * 100) / HZ) % 100);
#else
len = sprintf(page,"%lu.%02lu %lu.%02lu\n",
- uptime / HZ,
- uptime % HZ,
+ (unsigned long) uptime,
+ uptime_remainder,
idle / HZ,
idle % HZ);
#endif
@@ -281,8 +283,9 @@
{
int i, len;
extern unsigned long total_forks;
- unsigned long jif = jiffies;
- unsigned int sum = 0, user = 0, nice = 0, system = 0;
+ u64 jif = get_jiffies64();
+ unsigned int sum = 0;
+ unsigned long user = 0, nice = 0, system = 0;
int major, disk;
for (i = 0 ; i < smp_num_cpus; i++) {
@@ -297,17 +300,19 @@
#endif
}
- len = sprintf(page, "cpu %u %u %u %lu\n", user, nice, system,
- jif * smp_num_cpus - (user + nice + system));
+ len = sprintf(page, "cpu %lu %lu %lu %llu\n", user, nice, system,
+ (unsigned long long) jif * smp_num_cpus
+ - user - nice - system);
for (i = 0 ; i < smp_num_cpus; i++)
- len += sprintf(page + len, "cpu%d %u %u %u %lu\n",
+ len += sprintf(page + len, "cpu%d %lu %lu %lu %llu\n",
i,
kstat.per_cpu_user[cpu_logical_map(i)],
kstat.per_cpu_nice[cpu_logical_map(i)],
kstat.per_cpu_system[cpu_logical_map(i)],
- jif - ( kstat.per_cpu_user[cpu_logical_map(i)] \
- + kstat.per_cpu_nice[cpu_logical_map(i)] \
- + kstat.per_cpu_system[cpu_logical_map(i)]));
+ (unsigned long long)
+ jif - kstat.per_cpu_user[cpu_logical_map(i)]
+ - kstat.per_cpu_nice[cpu_logical_map(i)]
+ - kstat.per_cpu_system[cpu_logical_map(i)]);
len += sprintf(page + len,
"page %u %u\n"
"swap %u %u\n"
@@ -343,12 +348,13 @@
}
}
+ do_div(jif, HZ);
len += sprintf(page + len,
"\nctxt %lu\n"
"btime %lu\n"
"processes %lu\n",
nr_context_switches(),
- xtime.tv_sec - jif / HZ,
+ xtime.tv_sec - (unsigned long) jif,
total_forks);
return proc_calc_metrics(page, start, off, count, eof, len);
-
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This archive was generated by hypermail 2b29 : Tue May 14 2002 - 12:00:16 EST