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tools/memory-model: Label MP tests' producers and consumers

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This commit adds comments that label the MP tests' producer and consumer
processes, and also that label the "exists" clause as the bad outcome.

Reported-by: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
This commit is contained in:
Paul E. McKenney
2020-11-05 13:39:28 -08:00
parent acc4bdc55d
commit b6ff30849c
8 changed files with 24 additions and 24 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
tools/memory-model/litmus-tests/MP+fencewmbonceonce+fencermbonceonce.litmus
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@@ -13,14 +13,14 @@ C MP+fencewmbonceonce+fencermbonceonce
int flag; int flag;
} }
P0(int *buf, int *flag) P0(int *buf, int *flag) // Producer
{ {
WRITE_ONCE(*buf, 1); WRITE_ONCE(*buf, 1);
smp_wmb(); smp_wmb();
WRITE_ONCE(*flag, 1); WRITE_ONCE(*flag, 1);
} }
P1(int *buf, int *flag) P1(int *buf, int *flag) // Consumer
{ {
int r0; int r0;
int r1; int r1;
@@ -30,4 +30,4 @@ P1(int *buf, int *flag)
r1 = READ_ONCE(*buf); r1 = READ_ONCE(*buf);
} }
exists (1:r0=1 /\ 1:r1=0) exists (1:r0=1 /\ 1:r1=0) (* Bad outcome. *)

6
tools/memory-model/litmus-tests/MP+onceassign+derefonce.litmus
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@@ -15,13 +15,13 @@ C MP+onceassign+derefonce
int y=0; int y=0;
} }
P0(int *x, int **p) P0(int *x, int **p) // Producer
{ {
WRITE_ONCE(*x, 1); WRITE_ONCE(*x, 1);
rcu_assign_pointer(*p, x); rcu_assign_pointer(*p, x);
} }
P1(int *x, int **p) P1(int *x, int **p) // Consumer
{ {
int *r0; int *r0;
int r1; int r1;
@@ -32,4 +32,4 @@ P1(int *x, int **p)
rcu_read_unlock(); rcu_read_unlock();
} }
exists (1:r0=x /\ 1:r1=0) exists (1:r0=x /\ 1:r1=0) (* Bad outcome. *)

6
tools/memory-model/litmus-tests/MP+polockmbonce+poacquiresilsil.litmus
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@@ -15,7 +15,7 @@ C MP+polockmbonce+poacquiresilsil
int x; int x;
} }
P0(spinlock_t *lo, int *x) P0(spinlock_t *lo, int *x) // Producer
{ {
spin_lock(lo); spin_lock(lo);
smp_mb__after_spinlock(); smp_mb__after_spinlock();
@@ -23,7 +23,7 @@ P0(spinlock_t *lo, int *x)
spin_unlock(lo); spin_unlock(lo);
} }
P1(spinlock_t *lo, int *x) P1(spinlock_t *lo, int *x) // Consumer
{ {
int r1; int r1;
int r2; int r2;
@@ -34,4 +34,4 @@ P1(spinlock_t *lo, int *x)
r3 = spin_is_locked(lo); r3 = spin_is_locked(lo);
} }
exists (1:r1=1 /\ 1:r2=0 /\ 1:r3=1) exists (1:r1=1 /\ 1:r2=0 /\ 1:r3=1) (* Bad outcome. *)

6
tools/memory-model/litmus-tests/MP+polockonce+poacquiresilsil.litmus
View File

@@ -15,14 +15,14 @@ C MP+polockonce+poacquiresilsil
int x; int x;
} }
P0(spinlock_t *lo, int *x) P0(spinlock_t *lo, int *x) // Producer
{ {
spin_lock(lo); spin_lock(lo);
WRITE_ONCE(*x, 1); WRITE_ONCE(*x, 1);
spin_unlock(lo); spin_unlock(lo);
} }
P1(spinlock_t *lo, int *x) P1(spinlock_t *lo, int *x) // Consumer
{ {
int r1; int r1;
int r2; int r2;
@@ -33,4 +33,4 @@ P1(spinlock_t *lo, int *x)
r3 = spin_is_locked(lo); r3 = spin_is_locked(lo);
} }
exists (1:r1=1 /\ 1:r2=0 /\ 1:r3=1) exists (1:r1=1 /\ 1:r2=0 /\ 1:r3=1) (* Bad outcome. *)

6
tools/memory-model/litmus-tests/MP+polocks.litmus
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@@ -17,7 +17,7 @@ C MP+polocks
int flag; int flag;
} }
P0(int *buf, int *flag, spinlock_t *mylock) P0(int *buf, int *flag, spinlock_t *mylock) // Producer
{ {
WRITE_ONCE(*buf, 1); WRITE_ONCE(*buf, 1);
spin_lock(mylock); spin_lock(mylock);
@@ -25,7 +25,7 @@ P0(int *buf, int *flag, spinlock_t *mylock)
spin_unlock(mylock); spin_unlock(mylock);
} }
P1(int *buf, int *flag, spinlock_t *mylock) P1(int *buf, int *flag, spinlock_t *mylock) // Consumer
{ {
int r0; int r0;
int r1; int r1;
@@ -36,4 +36,4 @@ P1(int *buf, int *flag, spinlock_t *mylock)
r1 = READ_ONCE(*buf); r1 = READ_ONCE(*buf);
} }
exists (1:r0=1 /\ 1:r1=0) exists (1:r0=1 /\ 1:r1=0) (* Bad outcome. *)

6
tools/memory-model/litmus-tests/MP+poonceonces.litmus
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@@ -12,13 +12,13 @@ C MP+poonceonces
int flag; int flag;
} }
P0(int *buf, int *flag) P0(int *buf, int *flag) // Producer
{ {
WRITE_ONCE(*buf, 1); WRITE_ONCE(*buf, 1);
WRITE_ONCE(*flag, 1); WRITE_ONCE(*flag, 1);
} }
P1(int *buf, int *flag) P1(int *buf, int *flag) // Consumer
{ {
int r0; int r0;
int r1; int r1;
@@ -27,4 +27,4 @@ P1(int *buf, int *flag)
r1 = READ_ONCE(*buf); r1 = READ_ONCE(*buf);
} }
exists (1:r0=1 /\ 1:r1=0) exists (1:r0=1 /\ 1:r1=0) (* Bad outcome. *)

6
tools/memory-model/litmus-tests/MP+pooncerelease+poacquireonce.litmus
View File

@@ -13,13 +13,13 @@ C MP+pooncerelease+poacquireonce
int flag; int flag;
} }
P0(int *buf, int *flag) P0(int *buf, int *flag) // Producer
{ {
WRITE_ONCE(*buf, 1); WRITE_ONCE(*buf, 1);
smp_store_release(flag, 1); smp_store_release(flag, 1);
} }
P1(int *buf, int *flag) P1(int *buf, int *flag) // Consumer
{ {
int r0; int r0;
int r1; int r1;
@@ -28,4 +28,4 @@ P1(int *buf, int *flag)
r1 = READ_ONCE(*buf); r1 = READ_ONCE(*buf);
} }
exists (1:r0=1 /\ 1:r1=0) exists (1:r0=1 /\ 1:r1=0) (* Bad outcome. *)

6
tools/memory-model/litmus-tests/MP+porevlocks.litmus
View File

@@ -17,7 +17,7 @@ C MP+porevlocks
int flag; int flag;
} }
P0(int *buf, int *flag, spinlock_t *mylock) P0(int *buf, int *flag, spinlock_t *mylock) // Consumer
{ {
int r0; int r0;
int r1; int r1;
@@ -28,7 +28,7 @@ P0(int *buf, int *flag, spinlock_t *mylock)
spin_unlock(mylock); spin_unlock(mylock);
} }
P1(int *buf, int *flag, spinlock_t *mylock) P1(int *buf, int *flag, spinlock_t *mylock) // Producer
{ {
spin_lock(mylock); spin_lock(mylock);
WRITE_ONCE(*buf, 1); WRITE_ONCE(*buf, 1);
@@ -36,4 +36,4 @@ P1(int *buf, int *flag, spinlock_t *mylock)
WRITE_ONCE(*flag, 1); WRITE_ONCE(*flag, 1);
} }
exists (0:r0=1 /\ 0:r1=0) exists (0:r0=1 /\ 0:r1=0) (* Bad outcome. *)