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Pull virt-cpu-accounting into release branch

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This commit is contained in:
Tony Luck 2008-04-17 10:12:27 -07:00
parent 2a467d5f7d b64f34cdfe
commit 14d0647c98
12 changed files with 432 additions and 1 deletions
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11
arch/ia64/Kconfig
View file

@ -283,6 +283,17 @@ config FORCE_MAX_ZONEORDER
default "17" if HUGETLB_PAGE
default "11"
config VIRT_CPU_ACCOUNTING
bool "Deterministic task and CPU time accounting"
default n
help
Select this option to enable more accurate task and CPU time
accounting. This is done by reading a CPU counter on each
kernel entry and exit and on transitions within the kernel
between system, softirq and hardirq state, so there is a
small performance impact.
If in doubt, say N here.
config SMP
bool "Symmetric multi-processing support"
help

14
arch/ia64/ia32/elfcore32.h
View file

@ -30,7 +30,19 @@ struct elf_siginfo
int si_errno; /* errno */
};
#define jiffies_to_timeval(a,b) do { (b)->tv_usec = 0; (b)->tv_sec = (a)/HZ; }while(0)
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
/*
* Hacks are here since types between compat_timeval (= pair of s32) and
* ia64-native timeval (= pair of s64) are not compatible, at least a file
* arch/ia64/ia32/../../../fs/binfmt_elf.c will get warnings from compiler on
* use of cputime_to_timeval(), which usually an alias of jiffies_to_timeval().
*/
#define cputime_to_timeval(a,b) \
do { (b)->tv_usec = 0; (b)->tv_sec = (a)/NSEC_PER_SEC; } while(0)
#else
#define jiffies_to_timeval(a,b) \
do { (b)->tv_usec = 0; (b)->tv_sec = (a)/HZ; } while(0)
#endif
struct elf_prstatus
{

6
arch/ia64/kernel/asm-offsets.c
View file

@ -39,6 +39,12 @@ void foo(void)
DEFINE(TI_FLAGS, offsetof(struct thread_info, flags));
DEFINE(TI_CPU, offsetof(struct thread_info, cpu));
DEFINE(TI_PRE_COUNT, offsetof(struct thread_info, preempt_count));
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
DEFINE(TI_AC_STAMP, offsetof(struct thread_info, ac_stamp));
DEFINE(TI_AC_LEAVE, offsetof(struct thread_info, ac_leave));
DEFINE(TI_AC_STIME, offsetof(struct thread_info, ac_stime));
DEFINE(TI_AC_UTIME, offsetof(struct thread_info, ac_utime));
#endif
BLANK();

65
arch/ia64/kernel/entry.S
View file

@ -710,6 +710,16 @@ ENTRY(ia64_leave_syscall)
(pUStk) cmp.eq.unc p6,p0=r0,r0 // p6 <- pUStk
#endif
.work_processed_syscall:
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
adds r2=PT(LOADRS)+16,r12
(pUStk) mov.m r22=ar.itc // fetch time at leave
adds r18=TI_FLAGS+IA64_TASK_SIZE,r13
;;
(p6) ld4 r31=[r18] // load current_thread_info()->flags
ld8 r19=[r2],PT(B6)-PT(LOADRS) // load ar.rsc value for "loadrs"
adds r3=PT(AR_BSPSTORE)+16,r12 // deferred
;;
#else
adds r2=PT(LOADRS)+16,r12
adds r3=PT(AR_BSPSTORE)+16,r12
adds r18=TI_FLAGS+IA64_TASK_SIZE,r13
@ -718,6 +728,7 @@ ENTRY(ia64_leave_syscall)
ld8 r19=[r2],PT(B6)-PT(LOADRS) // load ar.rsc value for "loadrs"
nop.i 0
;;
#endif
mov r16=ar.bsp // M2 get existing backing store pointer
ld8 r18=[r2],PT(R9)-PT(B6) // load b6
(p6) and r15=TIF_WORK_MASK,r31 // any work other than TIF_SYSCALL_TRACE?
@ -737,12 +748,21 @@ ENTRY(ia64_leave_syscall)
ld8 r29=[r2],16 // M0|1 load cr.ipsr
ld8 r28=[r3],16 // M0|1 load cr.iip
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
(pUStk) add r14=TI_AC_LEAVE+IA64_TASK_SIZE,r13
;;
ld8 r30=[r2],16 // M0|1 load cr.ifs
ld8 r25=[r3],16 // M0|1 load ar.unat
(pUStk) add r15=IA64_TASK_THREAD_ON_USTACK_OFFSET,r13
;;
#else
mov r22=r0 // A clear r22
;;
ld8 r30=[r2],16 // M0|1 load cr.ifs
ld8 r25=[r3],16 // M0|1 load ar.unat
(pUStk) add r14=IA64_TASK_THREAD_ON_USTACK_OFFSET,r13
;;
#endif
ld8 r26=[r2],PT(B0)-PT(AR_PFS) // M0|1 load ar.pfs
(pKStk) mov r22=psr // M2 read PSR now that interrupts are disabled
nop 0
@ -759,7 +779,11 @@ ENTRY(ia64_leave_syscall)
ld8.fill r1=[r3],16 // M0|1 load r1
(pUStk) mov r17=1 // A
;;
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
(pUStk) st1 [r15]=r17 // M2|3
#else
(pUStk) st1 [r14]=r17 // M2|3
#endif
ld8.fill r13=[r3],16 // M0|1
mov f8=f0 // F clear f8
;;
@ -775,12 +799,22 @@ ENTRY(ia64_leave_syscall)
shr.u r18=r19,16 // I0|1 get byte size of existing "dirty" partition
cover // B add current frame into dirty partition & set cr.ifs
;;
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
mov r19=ar.bsp // M2 get new backing store pointer
st8 [r14]=r22 // M save time at leave
mov f10=f0 // F clear f10
mov r22=r0 // A clear r22
movl r14=__kernel_syscall_via_epc // X
;;
#else
mov r19=ar.bsp // M2 get new backing store pointer
mov f10=f0 // F clear f10
nop.m 0
movl r14=__kernel_syscall_via_epc // X
;;
#endif
mov.m ar.csd=r0 // M2 clear ar.csd
mov.m ar.ccv=r0 // M2 clear ar.ccv
mov b7=r14 // I0 clear b7 (hint with __kernel_syscall_via_epc)
@ -913,10 +947,18 @@ GLOBAL_ENTRY(ia64_leave_kernel)
adds r16=PT(CR_IPSR)+16,r12
adds r17=PT(CR_IIP)+16,r12
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
.pred.rel.mutex pUStk,pKStk
(pKStk) mov r22=psr // M2 read PSR now that interrupts are disabled
(pUStk) mov.m r22=ar.itc // M fetch time at leave
nop.i 0
;;
#else
(pKStk) mov r22=psr // M2 read PSR now that interrupts are disabled
nop.i 0
nop.i 0
;;
#endif
ld8 r29=[r16],16 // load cr.ipsr
ld8 r28=[r17],16 // load cr.iip
;;
@ -938,15 +980,37 @@ GLOBAL_ENTRY(ia64_leave_kernel)
;;
ld8.fill r12=[r16],16
ld8.fill r13=[r17],16
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
(pUStk) adds r3=TI_AC_LEAVE+IA64_TASK_SIZE,r18
#else
(pUStk) adds r18=IA64_TASK_THREAD_ON_USTACK_OFFSET,r18
#endif
;;
ld8 r20=[r16],16 // ar.fpsr
ld8.fill r15=[r17],16
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
(pUStk) adds r18=IA64_TASK_THREAD_ON_USTACK_OFFSET,r18 // deferred
#endif
;;
ld8.fill r14=[r16],16
ld8.fill r2=[r17]
(pUStk) mov r17=1
;;
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
// mmi_ : ld8 st1 shr;; mmi_ : st8 st1 shr;;
// mib : mov add br -> mib : ld8 add br
// bbb_ : br nop cover;; mbb_ : mov br cover;;
//
// no one require bsp in r16 if (pKStk) branch is selected.
(pUStk) st8 [r3]=r22 // save time at leave
(pUStk) st1 [r18]=r17 // restore current->thread.on_ustack
shr.u r18=r19,16 // get byte size of existing "dirty" partition
;;
ld8.fill r3=[r16] // deferred
LOAD_PHYS_STACK_REG_SIZE(r17)
(pKStk) br.cond.dpnt skip_rbs_switch
mov r16=ar.bsp // get existing backing store pointer
#else
ld8.fill r3=[r16]
(pUStk) st1 [r18]=r17 // restore current->thread.on_ustack
shr.u r18=r19,16 // get byte size of existing "dirty" partition
@ -954,6 +1018,7 @@ GLOBAL_ENTRY(ia64_leave_kernel)
mov r16=ar.bsp // get existing backing store pointer
LOAD_PHYS_STACK_REG_SIZE(r17)
(pKStk) br.cond.dpnt skip_rbs_switch
#endif
/*
* Restore user backing store.

26
arch/ia64/kernel/fsys.S
View file

@ -656,7 +656,11 @@ GLOBAL_ENTRY(fsys_bubble_down)
nop.i 0
;;
mov ar.rsc=0 // M2 set enforced lazy mode, pl 0, LE, loadrs=0
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
mov.m r30=ar.itc // M get cycle for accounting
#else
nop.m 0
#endif
nop.i 0
;;
mov r23=ar.bspstore // M2 (12 cyc) save ar.bspstore
@ -678,6 +682,28 @@ GLOBAL_ENTRY(fsys_bubble_down)
cmp.ne pKStk,pUStk=r0,r0 // A set pKStk <- 0, pUStk <- 1
br.call.sptk.many b7=ia64_syscall_setup // B
;;
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
// mov.m r30=ar.itc is called in advance
add r16=TI_AC_STAMP+IA64_TASK_SIZE,r2
add r17=TI_AC_LEAVE+IA64_TASK_SIZE,r2
;;
ld8 r18=[r16],TI_AC_STIME-TI_AC_STAMP // time at last check in kernel
ld8 r19=[r17],TI_AC_UTIME-TI_AC_LEAVE // time at leave kernel
;;
ld8 r20=[r16],TI_AC_STAMP-TI_AC_STIME // cumulated stime
ld8 r21=[r17] // cumulated utime
sub r22=r19,r18 // stime before leave kernel
;;
st8 [r16]=r30,TI_AC_STIME-TI_AC_STAMP // update stamp
sub r18=r30,r19 // elapsed time in user mode
;;
add r20=r20,r22 // sum stime
add r21=r21,r18 // sum utime
;;
st8 [r16]=r20 // update stime
st8 [r17]=r21 // update utime
;;
#endif
mov ar.rsc=0x3 // M2 set eager mode, pl 0, LE, loadrs=0
mov rp=r14 // I0 set the real return addr
and r3=_TIF_SYSCALL_TRACEAUDIT,r3 // A

20
arch/ia64/kernel/head.S
View file

@ -1002,6 +1002,26 @@ GLOBAL_ENTRY(sched_clock)
br.ret.sptk.many rp
END(sched_clock)
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
GLOBAL_ENTRY(cycle_to_cputime)
alloc r16=ar.pfs,1,0,0,0
addl r8=THIS_CPU(cpu_info) + IA64_CPUINFO_NSEC_PER_CYC_OFFSET,r0
;;
ldf8 f8=[r8]
;;
setf.sig f9=r32
;;
xmpy.lu f10=f9,f8 // calculate low 64 bits of 128-bit product (4 cyc)
xmpy.hu f11=f9,f8 // calculate high 64 bits of 128-bit product
;;
getf.sig r8=f10 // (5 cyc)
getf.sig r9=f11
;;
shrp r8=r9,r8,IA64_NSEC_PER_CYC_SHIFT
br.ret.sptk.many rp
END(cycle_to_cputime)
#endif /* CONFIG_VIRT_CPU_ACCOUNTING */
GLOBAL_ENTRY(start_kernel_thread)
.prologue
.save rp, r0 // this is the end of the call-chain

69
arch/ia64/kernel/ivt.S
View file

@ -805,8 +805,13 @@ ENTRY(break_fault)
(p8) adds r28=16,r28 // A switch cr.iip to next bundle
(p9) adds r8=1,r8 // A increment ei to next slot
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
;;
mov b6=r30 // I0 setup syscall handler branch reg early
#else
nop.i 0
;;
#endif
mov.m r25=ar.unat // M2 (5 cyc)
dep r29=r8,r29,41,2 // I0 insert new ei into cr.ipsr
@ -817,7 +822,11 @@ ENTRY(break_fault)
//
///////////////////////////////////////////////////////////////////////
st1 [r16]=r0 // M2|3 clear current->thread.on_ustack flag
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
mov.m r30=ar.itc // M get cycle for accounting
#else
mov b6=r30 // I0 setup syscall handler branch reg early
#endif
cmp.eq pKStk,pUStk=r0,r17 // A were we on kernel stacks already?
and r9=_TIF_SYSCALL_TRACEAUDIT,r9 // A mask trace or audit
@ -829,6 +838,30 @@ ENTRY(break_fault)
cmp.eq p14,p0=r9,r0 // A are syscalls being traced/audited?
br.call.sptk.many b7=ia64_syscall_setup // B
1:
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
// mov.m r30=ar.itc is called in advance, and r13 is current
add r16=TI_AC_STAMP+IA64_TASK_SIZE,r13 // A
add r17=TI_AC_LEAVE+IA64_TASK_SIZE,r13 // A
(pKStk) br.cond.spnt .skip_accounting // B unlikely skip
;;
ld8 r18=[r16],TI_AC_STIME-TI_AC_STAMP // M get last stamp
ld8 r19=[r17],TI_AC_UTIME-TI_AC_LEAVE // M time at leave
;;
ld8 r20=[r16],TI_AC_STAMP-TI_AC_STIME // M cumulated stime
ld8 r21=[r17] // M cumulated utime
sub r22=r19,r18 // A stime before leave
;;
st8 [r16]=r30,TI_AC_STIME-TI_AC_STAMP // M update stamp
sub r18=r30,r19 // A elapsed time in user
;;
add r20=r20,r22 // A sum stime
add r21=r21,r18 // A sum utime
;;
st8 [r16]=r20 // M update stime
st8 [r17]=r21 // M update utime
;;
.skip_accounting:
#endif
mov ar.rsc=0x3 // M2 set eager mode, pl 0, LE, loadrs=0
nop 0
bsw.1 // B (6 cyc) regs are saved, switch to bank 1
@ -928,6 +961,7 @@ END(interrupt)
* - r27: saved ar.rsc
* - r28: saved cr.iip
* - r29: saved cr.ipsr
* - r30: ar.itc for accounting (don't touch)
* - r31: saved pr
* - b0: original contents (to be saved)
* On exit:
@ -1090,6 +1124,41 @@ END(dispatch_illegal_op_fault)
DBG_FAULT(16)
FAULT(16)
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
/*
* There is no particular reason for this code to be here, other than
* that there happens to be space here that would go unused otherwise.
* If this fault ever gets "unreserved", simply moved the following
* code to a more suitable spot...
*
* account_sys_enter is called from SAVE_MIN* macros if accounting is
* enabled and if the macro is entered from user mode.
*/
ENTRY(account_sys_enter)
// mov.m r20=ar.itc is called in advance, and r13 is current
add r16=TI_AC_STAMP+IA64_TASK_SIZE,r13
add r17=TI_AC_LEAVE+IA64_TASK_SIZE,r13
;;
ld8 r18=[r16],TI_AC_STIME-TI_AC_STAMP // time at last check in kernel
ld8 r19=[r17],TI_AC_UTIME-TI_AC_LEAVE // time at left from kernel
;;
ld8 r23=[r16],TI_AC_STAMP-TI_AC_STIME // cumulated stime
ld8 r21=[r17] // cumulated utime
sub r22=r19,r18 // stime before leave kernel
;;
st8 [r16]=r20,TI_AC_STIME-TI_AC_STAMP // update stamp
sub r18=r20,r19 // elapsed time in user mode
;;
add r23=r23,r22 // sum stime
add r21=r21,r18 // sum utime
;;
st8 [r16]=r23 // update stime
st8 [r17]=r21 // update utime
;;
br.ret.sptk.many rp
END(account_sys_enter)
#endif
.org ia64_ivt+0x4400
/////////////////////////////////////////////////////////////////////////////////////////
// 0x4400 Entry 17 (size 64 bundles) Reserved

14
arch/ia64/kernel/minstate.h
View file

@ -3,6 +3,18 @@
#include "entry.h"
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
/* read ar.itc in advance, and use it before leaving bank 0 */
#define ACCOUNT_GET_STAMP \
(pUStk) mov.m r20=ar.itc;
#define ACCOUNT_SYS_ENTER \
(pUStk) br.call.spnt rp=account_sys_enter \
;;
#else
#define ACCOUNT_GET_STAMP
#define ACCOUNT_SYS_ENTER
#endif
/*
* DO_SAVE_MIN switches to the kernel stacks (if necessary) and saves
* the minimum state necessary that allows us to turn psr.ic back
@ -122,11 +134,13 @@
;; \
.mem.offset 0,0; st8.spill [r16]=r2,16; \
.mem.offset 8,0; st8.spill [r17]=r3,16; \
ACCOUNT_GET_STAMP \
adds r2=IA64_PT_REGS_R16_OFFSET,r1; \
;; \
EXTRA; \
movl r1=__gp; /* establish kernel global pointer */ \
;; \
ACCOUNT_SYS_ENTER \
bsw.1; /* switch back to bank 1 (must be last in insn group) */ \
;;

78
arch/ia64/kernel/time.c
View file

@ -59,6 +59,84 @@ static struct clocksource clocksource_itc = {
};
static struct clocksource *itc_clocksource;
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
#include <linux/kernel_stat.h>
extern cputime_t cycle_to_cputime(u64 cyc);
/*
* Called from the context switch with interrupts disabled, to charge all
* accumulated times to the current process, and to prepare accounting on
* the next process.
*/
void ia64_account_on_switch(struct task_struct *prev, struct task_struct *next)
{
struct thread_info *pi = task_thread_info(prev);
struct thread_info *ni = task_thread_info(next);
cputime_t delta_stime, delta_utime;
__u64 now;
now = ia64_get_itc();
delta_stime = cycle_to_cputime(pi->ac_stime + (now - pi->ac_stamp));
account_system_time(prev, 0, delta_stime);
account_system_time_scaled(prev, delta_stime);
if (pi->ac_utime) {
delta_utime = cycle_to_cputime(pi->ac_utime);
account_user_time(prev, delta_utime);
account_user_time_scaled(prev, delta_utime);
}
pi->ac_stamp = ni->ac_stamp = now;
ni->ac_stime = ni->ac_utime = 0;
}
/*
* Account time for a transition between system, hard irq or soft irq state.
* Note that this function is called with interrupts enabled.
*/
void account_system_vtime(struct task_struct *tsk)
{
struct thread_info *ti = task_thread_info(tsk);
unsigned long flags;
cputime_t delta_stime;
__u64 now;
local_irq_save(flags);
now = ia64_get_itc();
delta_stime = cycle_to_cputime(ti->ac_stime + (now - ti->ac_stamp));
account_system_time(tsk, 0, delta_stime);
account_system_time_scaled(tsk, delta_stime);
ti->ac_stime = 0;
ti->ac_stamp = now;
local_irq_restore(flags);
}
/*
* Called from the timer interrupt handler to charge accumulated user time
* to the current process. Must be called with interrupts disabled.
*/
void account_process_tick(struct task_struct *p, int user_tick)
{
struct thread_info *ti = task_thread_info(p);
cputime_t delta_utime;
if (ti->ac_utime) {
delta_utime = cycle_to_cputime(ti->ac_utime);
account_user_time(p, delta_utime);
account_user_time_scaled(p, delta_utime);
ti->ac_utime = 0;
}
}
#endif /* CONFIG_VIRT_CPU_ACCOUNTING */
static irqreturn_t
timer_interrupt (int irq, void *dev_id)
{

104
include/asm-ia64/cputime.h
View file

@ -1,6 +1,110 @@
/*
* include/asm-ia64/cputime.h:
* Definitions for measuring cputime on ia64 machines.
*
* Based on <asm-powerpc/cputime.h>.
*
* Copyright (C) 2007 FUJITSU LIMITED
* Copyright (C) 2007 Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*
* If we have CONFIG_VIRT_CPU_ACCOUNTING, we measure cpu time in nsec.
* Otherwise we measure cpu time in jiffies using the generic definitions.
*/
#ifndef __IA64_CPUTIME_H
#define __IA64_CPUTIME_H
#ifndef CONFIG_VIRT_CPU_ACCOUNTING
#include <asm-generic/cputime.h>
#else
#include <linux/time.h>
#include <linux/jiffies.h>
#include <asm/processor.h>
typedef u64 cputime_t;
typedef u64 cputime64_t;
#define cputime_zero ((cputime_t)0)
#define cputime_max ((~((cputime_t)0) >> 1) - 1)
#define cputime_add(__a, __b) ((__a) + (__b))
#define cputime_sub(__a, __b) ((__a) - (__b))
#define cputime_div(__a, __n) ((__a) / (__n))
#define cputime_halve(__a) ((__a) >> 1)
#define cputime_eq(__a, __b) ((__a) == (__b))
#define cputime_gt(__a, __b) ((__a) > (__b))
#define cputime_ge(__a, __b) ((__a) >= (__b))
#define cputime_lt(__a, __b) ((__a) < (__b))
#define cputime_le(__a, __b) ((__a) <= (__b))
#define cputime64_zero ((cputime64_t)0)
#define cputime64_add(__a, __b) ((__a) + (__b))
#define cputime64_sub(__a, __b) ((__a) - (__b))
#define cputime_to_cputime64(__ct) (__ct)
/*
* Convert cputime <-> jiffies (HZ)
*/
#define cputime_to_jiffies(__ct) ((__ct) / (NSEC_PER_SEC / HZ))
#define jiffies_to_cputime(__jif) ((__jif) * (NSEC_PER_SEC / HZ))
#define cputime64_to_jiffies64(__ct) ((__ct) / (NSEC_PER_SEC / HZ))
#define jiffies64_to_cputime64(__jif) ((__jif) * (NSEC_PER_SEC / HZ))
/*
* Convert cputime <-> milliseconds
*/
#define cputime_to_msecs(__ct) ((__ct) / NSEC_PER_MSEC)
#define msecs_to_cputime(__msecs) ((__msecs) * NSEC_PER_MSEC)
/*
* Convert cputime <-> seconds
*/
#define cputime_to_secs(__ct) ((__ct) / NSEC_PER_SEC)
#define secs_to_cputime(__secs) ((__secs) * NSEC_PER_SEC)
/*
* Convert cputime <-> timespec (nsec)
*/
static inline cputime_t timespec_to_cputime(const struct timespec *val)
{
cputime_t ret = val->tv_sec * NSEC_PER_SEC;
return (ret + val->tv_nsec);
}
static inline void cputime_to_timespec(const cputime_t ct, struct timespec *val)
{
val->tv_sec = ct / NSEC_PER_SEC;
val->tv_nsec = ct % NSEC_PER_SEC;
}
/*
* Convert cputime <-> timeval (msec)
*/
static inline cputime_t timeval_to_cputime(struct timeval *val)
{
cputime_t ret = val->tv_sec * NSEC_PER_SEC;
return (ret + val->tv_usec * NSEC_PER_USEC);
}
static inline void cputime_to_timeval(const cputime_t ct, struct timeval *val)
{
val->tv_sec = ct / NSEC_PER_SEC;
val->tv_usec = (ct % NSEC_PER_SEC) / NSEC_PER_USEC;
}
/*
* Convert cputime <-> clock (USER_HZ)
*/
#define cputime_to_clock_t(__ct) ((__ct) / (NSEC_PER_SEC / USER_HZ))
#define clock_t_to_cputime(__x) ((__x) * (NSEC_PER_SEC / USER_HZ))
/*
* Convert cputime64 to clock.
*/
#define cputime64_to_clock_t(__ct) cputime_to_clock_t((cputime_t)__ct)
#endif /* CONFIG_VIRT_CPU_ACCOUNTING */
#endif /* __IA64_CPUTIME_H */

12
include/asm-ia64/system.h
View file

@ -210,6 +210,13 @@ struct task_struct;
extern void ia64_save_extra (struct task_struct *task);
extern void ia64_load_extra (struct task_struct *task);
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
extern void ia64_account_on_switch (struct task_struct *prev, struct task_struct *next);
# define IA64_ACCOUNT_ON_SWITCH(p,n) ia64_account_on_switch(p,n)
#else
# define IA64_ACCOUNT_ON_SWITCH(p,n)
#endif
#ifdef CONFIG_PERFMON
DECLARE_PER_CPU(unsigned long, pfm_syst_info);
# define PERFMON_IS_SYSWIDE() (__get_cpu_var(pfm_syst_info) & 0x1)
@ -222,6 +229,7 @@ extern void ia64_load_extra (struct task_struct *task);
|| IS_IA32_PROCESS(task_pt_regs(t)) || PERFMON_IS_SYSWIDE())
#define __switch_to(prev,next,last) do { \
IA64_ACCOUNT_ON_SWITCH(prev, next); \
if (IA64_HAS_EXTRA_STATE(prev)) \
ia64_save_extra(prev); \
if (IA64_HAS_EXTRA_STATE(next)) \
@ -266,6 +274,10 @@ void cpu_idle_wait(void);
void default_idle(void);
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
extern void account_system_vtime(struct task_struct *);
#endif
#endif /* __KERNEL__ */
#endif /* __ASSEMBLY__ */

14
include/asm-ia64/thread_info.h
View file

@ -31,6 +31,12 @@ struct thread_info {
mm_segment_t addr_limit; /* user-level address space limit */
int preempt_count; /* 0=premptable, <0=BUG; will also serve as bh-counter */
struct restart_block restart_block;
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
__u64 ac_stamp;
__u64 ac_leave;
__u64 ac_stime;
__u64 ac_utime;
#endif
};
#define THREAD_SIZE KERNEL_STACK_SIZE
@ -62,9 +68,17 @@ struct thread_info {
#define task_stack_page(tsk) ((void *)(tsk))
#define __HAVE_THREAD_FUNCTIONS
#ifdef CONFIG_VIRT_CPU_ACCOUNTING
#define setup_thread_stack(p, org) \
*task_thread_info(p) = *task_thread_info(org); \
task_thread_info(p)->ac_stime = 0; \
task_thread_info(p)->ac_utime = 0; \
task_thread_info(p)->task = (p);
#else
#define setup_thread_stack(p, org) \
*task_thread_info(p) = *task_thread_info(org); \
task_thread_info(p)->task = (p);
#endif
#define end_of_stack(p) (unsigned long *)((void *)(p) + IA64_RBS_OFFSET)
#define __HAVE_ARCH_TASK_STRUCT_ALLOCATOR