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authorTony Luck <tony.luck@intel.com>2008-04-17 10:12:27 -0700
committerTony Luck <tony.luck@intel.com>2008-04-17 10:12:27 -0700
commit14d0647c98f52e2d76113d44de6b771ec87a934f (patch)
tree4b9407b00ad0b5baf5ee6245a4157a07062680b5 /arch/ia64/kernel/fsys.S
parent2a467d5f7d6bdc90c365db167a10022dd8351894 (diff)
parentb64f34cdfe5bef9dfed1304c513220b0f2862eca (diff)
Pull virt-cpu-accounting into release branch
Diffstat (limited to 'arch/ia64/kernel/fsys.S')
-rw-r--r--arch/ia64/kernel/fsys.S26
1 files changed, 26 insertions, 0 deletions
diff --git a/arch/ia64/kernel/fsys.S b/arch/ia64/kernel/fsys.S
index 6a72db7ddecc..357b7e2adc63 100644
--- a/arch/ia64/kernel/fsys.S
+++ b/arch/ia64/kernel/fsys.S
@@ -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