178bf2b9a2
In clock sched we now have three loads: - Function pointer - quotient for multiplication - offset However, it is possible to improve performance substantially, by guaranteeing that all three loads are from the same cacheline. By moving these three values first in sparc64_tick_ops, and by having tick_operations 64-byte aligned we guarantee this. Signed-off-by: Pavel Tatashin <pasha.tatashin@oracle.com> Reviewed-by: Shannon Nelson <shannon.nelson@oracle.com> Reviewed-by: Steven Sistare <steven.sistare@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
36 lines
817 B
C
36 lines
817 B
C
/* timer.h: System timer definitions for sun5.
|
|
*
|
|
* Copyright (C) 1997, 2008 David S. Miller (davem@davemloft.net)
|
|
*/
|
|
|
|
#ifndef _SPARC64_TIMER_H
|
|
#define _SPARC64_TIMER_H
|
|
|
|
#include <linux/types.h>
|
|
#include <linux/init.h>
|
|
|
|
/* The most frequently accessed fields should be first,
|
|
* to fit into the same cacheline.
|
|
*/
|
|
struct sparc64_tick_ops {
|
|
unsigned long ticks_per_nsec_quotient;
|
|
unsigned long offset;
|
|
unsigned long long (*get_tick)(void);
|
|
int (*add_compare)(unsigned long);
|
|
unsigned long softint_mask;
|
|
void (*disable_irq)(void);
|
|
|
|
void (*init_tick)(void);
|
|
unsigned long (*add_tick)(unsigned long);
|
|
|
|
char *name;
|
|
};
|
|
|
|
extern struct sparc64_tick_ops *tick_ops;
|
|
|
|
unsigned long sparc64_get_clock_tick(unsigned int cpu);
|
|
void setup_sparc64_timer(void);
|
|
void __init time_init(void);
|
|
|
|
#endif /* _SPARC64_TIMER_H */
|