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authorArtur Grabowski <art@cvs.openbsd.org>2008-07-18 23:43:32 +0000
committerArtur Grabowski <art@cvs.openbsd.org>2008-07-18 23:43:32 +0000
commitcbf40e0f6a4ee8fde77e05f8b74ca4b989937d38 (patch)
tree761b8494073324eacc2b020b8dcffd3c81afb3ee /sys/arch
parent7dde4e5a62193339964b0d2205abffd301cc786b (diff)
Add a macro that clears the want_resched flag that need_resched sets.
Right now when mi_switch picks up the same proc, we didn't clear the flag which would mean that every time we service an AST we would attempt a context switch. For some architectures, amd64 being probably the most extreme, that meant attempting to context switch for every trap and interrupt. Now we clear_resched explicitly after every context switch, even if it didn't do anything. Which also allows us to remove some more code in cpu_switchto (not done yet). miod@ ok
Diffstat (limited to 'sys/arch')
-rw-r--r--sys/arch/alpha/include/cpu.h4
-rw-r--r--sys/arch/amd64/include/cpu.h3
-rw-r--r--sys/arch/arm/include/cpu.h3
-rw-r--r--sys/arch/hp300/include/cpu.h3
-rw-r--r--sys/arch/hppa/include/cpu.h3
-rw-r--r--sys/arch/hppa64/include/cpu.h3
-rw-r--r--sys/arch/i386/include/cpu.h3
-rw-r--r--sys/arch/m88k/include/cpu.h3
-rw-r--r--sys/arch/mac68k/include/cpu.h3
-rw-r--r--sys/arch/mips64/include/cpu.h3
-rw-r--r--sys/arch/mvme68k/include/cpu.h3
-rw-r--r--sys/arch/powerpc/include/cpu.h3
-rw-r--r--sys/arch/sh/include/cpu.h3
-rw-r--r--sys/arch/sparc/include/cpu.h3
-rw-r--r--sys/arch/sparc64/include/cpu.h3
-rw-r--r--sys/arch/vax/include/cpu.h3
16 files changed, 33 insertions, 16 deletions
diff --git a/sys/arch/alpha/include/cpu.h b/sys/arch/alpha/include/cpu.h
index 5937dbdd0d4..9e393ffc3d6 100644
--- a/sys/arch/alpha/include/cpu.h
+++ b/sys/arch/alpha/include/cpu.h
@@ -1,4 +1,4 @@
-/* $OpenBSD: cpu.h,v 1.32 2008/06/26 05:42:08 ray Exp $ */
+/* $OpenBSD: cpu.h,v 1.33 2008/07/18 23:43:31 art Exp $ */
/* $NetBSD: cpu.h,v 1.45 2000/08/21 02:03:12 thorpej Exp $ */
/*-
@@ -282,12 +282,14 @@ do { \
ci->ci_want_resched = 1; \
aston(curcpu()); \
} while (/*CONSTCOND*/0)
+#define clear_resched(ci) (ci)->ci_want_resched = 0
#else
#define need_resched(ci) \
do { \
curcpu()->ci_want_resched = 1; \
aston(curcpu()); \
} while (/*CONSTCOND*/0)
+#define clear_resched(ci) curcpu()->ci_want_resched = 0
#endif
/*
diff --git a/sys/arch/amd64/include/cpu.h b/sys/arch/amd64/include/cpu.h
index 2516fdd256b..248a9659c6e 100644
--- a/sys/arch/amd64/include/cpu.h
+++ b/sys/arch/amd64/include/cpu.h
@@ -1,4 +1,4 @@
-/* $OpenBSD: cpu.h,v 1.36 2008/06/10 02:55:39 weingart Exp $ */
+/* $OpenBSD: cpu.h,v 1.37 2008/07/18 23:43:31 art Exp $ */
/* $NetBSD: cpu.h,v 1.1 2003/04/26 18:39:39 fvdl Exp $ */
/*-
@@ -161,6 +161,7 @@ extern struct cpu_info *cpu_info_list;
* or after the current trap/syscall if in system mode.
*/
extern void need_resched(struct cpu_info *);
+#define clear_resched(ci) (ci)->ci_want_resched = 0
#if defined(MULTIPROCESSOR)
diff --git a/sys/arch/arm/include/cpu.h b/sys/arch/arm/include/cpu.h
index 9aa2166b1f2..0c418dcb21f 100644
--- a/sys/arch/arm/include/cpu.h
+++ b/sys/arch/arm/include/cpu.h
@@ -1,4 +1,4 @@
-/* $OpenBSD: cpu.h,v 1.18 2007/08/14 15:18:07 deraadt Exp $ */
+/* $OpenBSD: cpu.h,v 1.19 2008/07/18 23:43:31 art Exp $ */
/* $NetBSD: cpu.h,v 1.34 2003/06/23 11:01:08 martin Exp $ */
/*
@@ -256,6 +256,7 @@ extern int astpending;
*/
extern int want_resched; /* resched() was called */
#define need_resched(ci) (want_resched = 1, setsoftast())
+#define clear_resched(ci) want_resched = 0
/*
* Give a profiling tick to the current process when the user profiling
diff --git a/sys/arch/hp300/include/cpu.h b/sys/arch/hp300/include/cpu.h
index 76afb0a716c..a524d1cb618 100644
--- a/sys/arch/hp300/include/cpu.h
+++ b/sys/arch/hp300/include/cpu.h
@@ -1,4 +1,4 @@
-/* $OpenBSD: cpu.h,v 1.35 2007/11/02 19:18:54 martin Exp $ */
+/* $OpenBSD: cpu.h,v 1.36 2008/07/18 23:43:31 art Exp $ */
/* $NetBSD: cpu.h,v 1.28 1998/02/13 07:41:51 scottr Exp $ */
/*
@@ -92,6 +92,7 @@ struct clockframe {
*/
extern int want_resched; /* resched() was called */
#define need_resched(ci) { want_resched = 1; aston(); }
+#define clear_resched(ci) want_resched = 0
/*
* Give a profiling tick to the current process when the user profiling
diff --git a/sys/arch/hppa/include/cpu.h b/sys/arch/hppa/include/cpu.h
index f4b45f47d30..d80bae1d2ed 100644
--- a/sys/arch/hppa/include/cpu.h
+++ b/sys/arch/hppa/include/cpu.h
@@ -1,4 +1,4 @@
-/* $OpenBSD: cpu.h,v 1.53 2008/07/14 13:39:06 miod Exp $ */
+/* $OpenBSD: cpu.h,v 1.54 2008/07/18 23:43:31 art Exp $ */
/*
* Copyright (c) 2000-2004 Michael Shalayeff
@@ -151,6 +151,7 @@ extern register_t kpsw;
#define signotify(p) (setsoftast())
#define need_resched(ci) (want_resched = 1, setsoftast())
+#define clear_resched(ci) want_resched = 0
#define need_proftick(p) setsoftast()
#define PROC_PC(p) ((p)->p_md.md_regs->tf_iioq_head)
diff --git a/sys/arch/hppa64/include/cpu.h b/sys/arch/hppa64/include/cpu.h
index ddc35e3be5b..b34705b425f 100644
--- a/sys/arch/hppa64/include/cpu.h
+++ b/sys/arch/hppa64/include/cpu.h
@@ -1,4 +1,4 @@
-/* $OpenBSD: cpu.h,v 1.11 2007/05/16 19:37:06 thib Exp $ */
+/* $OpenBSD: cpu.h,v 1.12 2008/07/18 23:43:31 art Exp $ */
/*
* Copyright (c) 2005 Michael Shalayeff
@@ -196,6 +196,7 @@ extern int cpu_hvers;
#define signotify(p) (setsoftast())
#define need_resched(ci) (want_resched = 1, setsoftast())
+#define clear_resched(ci) want_resched = 0
#define need_proftick(p) setsoftast()
#ifndef _LOCORE
diff --git a/sys/arch/i386/include/cpu.h b/sys/arch/i386/include/cpu.h
index 7632dbb53ce..62209b1acb3 100644
--- a/sys/arch/i386/include/cpu.h
+++ b/sys/arch/i386/include/cpu.h
@@ -1,4 +1,4 @@
-/* $OpenBSD: cpu.h,v 1.102 2008/06/09 20:43:43 miod Exp $ */
+/* $OpenBSD: cpu.h,v 1.103 2008/07/18 23:43:31 art Exp $ */
/* $NetBSD: cpu.h,v 1.35 1996/05/05 19:29:26 christos Exp $ */
/*-
@@ -230,6 +230,7 @@ extern void cpu_init_idle_pcbs(void);
* or after the current trap/syscall if in system mode.
*/
extern void need_resched(struct cpu_info *);
+#define clear_resched(ci) (ci)->ci_want_resched = 0
#define CLKF_USERMODE(frame) USERMODE((frame)->if_cs, (frame)->if_eflags)
#define CLKF_PC(frame) ((frame)->if_eip)
diff --git a/sys/arch/m88k/include/cpu.h b/sys/arch/m88k/include/cpu.h
index aa3acd6438b..2e196920d8f 100644
--- a/sys/arch/m88k/include/cpu.h
+++ b/sys/arch/m88k/include/cpu.h
@@ -1,4 +1,4 @@
-/* $OpenBSD: cpu.h,v 1.34 2008/01/13 20:20:29 miod Exp $ */
+/* $OpenBSD: cpu.h,v 1.35 2008/07/18 23:43:31 art Exp $ */
/*
* Copyright (c) 1996 Nivas Madhur
* Copyright (c) 1992, 1993
@@ -241,6 +241,7 @@ do { \
if (ci->ci_curproc != NULL) \
aston(ci->ci_curproc); \
} while (0)
+#define clear_resched(ci) (ci)->ci_want_resched = 0
/*
* Give a profiling tick to the current process when the user profiling
diff --git a/sys/arch/mac68k/include/cpu.h b/sys/arch/mac68k/include/cpu.h
index f3562fbdc94..4ad125df84b 100644
--- a/sys/arch/mac68k/include/cpu.h
+++ b/sys/arch/mac68k/include/cpu.h
@@ -1,4 +1,4 @@
-/* $OpenBSD: cpu.h,v 1.46 2007/11/02 19:18:54 martin Exp $ */
+/* $OpenBSD: cpu.h,v 1.47 2008/07/18 23:43:31 art Exp $ */
/* $NetBSD: cpu.h,v 1.45 1997/02/10 22:13:40 scottr Exp $ */
/*
@@ -105,6 +105,7 @@ struct clockframe {
*/
extern int want_resched; /* resched() was called */
#define need_resched(ci) { want_resched = 1; aston(); }
+#define clear_resched(ci) want_resched = 0
/*
* Give a profiling tick to the current process from the softclock
diff --git a/sys/arch/mips64/include/cpu.h b/sys/arch/mips64/include/cpu.h
index d320ef5a309..3a5d6d96f78 100644
--- a/sys/arch/mips64/include/cpu.h
+++ b/sys/arch/mips64/include/cpu.h
@@ -1,4 +1,4 @@
-/* $OpenBSD: cpu.h,v 1.24 2008/04/07 22:37:16 miod Exp $ */
+/* $OpenBSD: cpu.h,v 1.25 2008/07/18 23:43:31 art Exp $ */
/*-
* Copyright (c) 1992, 1993
@@ -409,6 +409,7 @@ extern int int_nest_cntr;
* or after the current trap/syscall if in system mode.
*/
#define need_resched(info) { want_resched = 1; aston(); }
+#define clear_resched(ci) want_resched = 0
/*
* Give a profiling tick to the current process when the user profiling
diff --git a/sys/arch/mvme68k/include/cpu.h b/sys/arch/mvme68k/include/cpu.h
index 99f07c83839..727b8171e37 100644
--- a/sys/arch/mvme68k/include/cpu.h
+++ b/sys/arch/mvme68k/include/cpu.h
@@ -1,4 +1,4 @@
-/* $OpenBSD: cpu.h,v 1.27 2007/05/30 17:10:44 miod Exp $ */
+/* $OpenBSD: cpu.h,v 1.28 2008/07/18 23:43:31 art Exp $ */
/*
* Copyright (c) 1995 Theo de Raadt
@@ -115,6 +115,7 @@ struct clockframe {
*/
extern int want_resched;
#define need_resched(ci) { want_resched = 1; aston(); }
+#define clear_resched(ci) want_resched = 0
/*
* Give a profiling tick to the current process when the user profiling
diff --git a/sys/arch/powerpc/include/cpu.h b/sys/arch/powerpc/include/cpu.h
index e95b065b37b..4a6d2ed2692 100644
--- a/sys/arch/powerpc/include/cpu.h
+++ b/sys/arch/powerpc/include/cpu.h
@@ -1,4 +1,4 @@
-/* $OpenBSD: cpu.h,v 1.37 2008/05/04 20:54:22 drahn Exp $ */
+/* $OpenBSD: cpu.h,v 1.38 2008/07/18 23:43:31 art Exp $ */
/* $NetBSD: cpu.h,v 1.1 1996/09/30 16:34:21 ws Exp $ */
/*
@@ -151,6 +151,7 @@ do { \
if (ci->ci_curproc != NULL) \
aston(ci->ci_curproc); \
} while (0)
+#define clear_resched(ci) (ci)->ci_want_resched = 0
#define need_proftick(p) aston(p)
diff --git a/sys/arch/sh/include/cpu.h b/sys/arch/sh/include/cpu.h
index 2b8a0d5d579..dd2cd3138d1 100644
--- a/sys/arch/sh/include/cpu.h
+++ b/sys/arch/sh/include/cpu.h
@@ -1,4 +1,4 @@
-/* $OpenBSD: cpu.h,v 1.13 2008/05/21 19:45:37 miod Exp $ */
+/* $OpenBSD: cpu.h,v 1.14 2008/07/18 23:43:31 art Exp $ */
/* $NetBSD: cpu.h,v 1.41 2006/01/21 04:24:12 uwe Exp $ */
/*-
@@ -101,6 +101,7 @@ do { \
if (curproc != NULL) \
aston(curproc); \
} while (/*CONSTCOND*/0)
+#define clear_resched(ci) want_resched = 0
/*
* Give a profiling tick to the current process when the user profiling
diff --git a/sys/arch/sparc/include/cpu.h b/sys/arch/sparc/include/cpu.h
index 44686965093..5d44640212f 100644
--- a/sys/arch/sparc/include/cpu.h
+++ b/sys/arch/sparc/include/cpu.h
@@ -1,4 +1,4 @@
-/* $OpenBSD: cpu.h,v 1.29 2007/05/08 07:23:18 art Exp $ */
+/* $OpenBSD: cpu.h,v 1.30 2008/07/18 23:43:31 art Exp $ */
/* $NetBSD: cpu.h,v 1.24 1997/03/15 22:25:15 pk Exp $ */
/*
@@ -131,6 +131,7 @@ extern void raise(int, int);
*/
extern int want_resched; /* resched() was called */
#define need_resched(ci) (want_resched = 1, want_ast = 1)
+#define clear_resched(ci) want_resched = 0
extern int want_ast;
/*
diff --git a/sys/arch/sparc64/include/cpu.h b/sys/arch/sparc64/include/cpu.h
index 709165826e1..a6251debd25 100644
--- a/sys/arch/sparc64/include/cpu.h
+++ b/sys/arch/sparc64/include/cpu.h
@@ -1,4 +1,4 @@
-/* $OpenBSD: cpu.h,v 1.62 2008/07/04 22:03:30 kettenis Exp $ */
+/* $OpenBSD: cpu.h,v 1.63 2008/07/18 23:43:31 art Exp $ */
/* $NetBSD: cpu.h,v 1.28 2001/06/14 22:56:58 thorpej Exp $ */
/*
@@ -223,6 +223,7 @@ void setsoftnet(void);
* or after the current trap/syscall if in system mode.
*/
extern void need_resched(struct cpu_info *);
+#define clear_resched(ci) (ci)->ci_want_resched = 0
/*
* This is used during profiling to integrate system time.
diff --git a/sys/arch/vax/include/cpu.h b/sys/arch/vax/include/cpu.h
index dc6ec203a16..4dc1b5a8654 100644
--- a/sys/arch/vax/include/cpu.h
+++ b/sys/arch/vax/include/cpu.h
@@ -1,4 +1,4 @@
-/* $OpenBSD: cpu.h,v 1.26 2007/10/10 15:53:53 art Exp $ */
+/* $OpenBSD: cpu.h,v 1.27 2008/07/18 23:43:31 art Exp $ */
/* $NetBSD: cpu.h,v 1.41 1999/10/21 20:01:36 ragge Exp $ */
/*
@@ -107,6 +107,7 @@ extern int bootdev;
want_resched++; \
mtpr(AST_OK,PR_ASTLVL); \
}
+#define clear_resched(ci) want_resched = 0
/*
* Notify the current process (p) that it has a signal pending,
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-05 02:01:19 +0000