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

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>
zero-sugar-mainline-defconfig
Paul E. McKenney 2020-11-05 13:39:28 -08:00
parent acc4bdc55d
commit b6ff30849c
8 changed files with 24 additions and 24 deletions
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6
tools/memory-model/litmus-tests/MP+fencewmbonceonce+fencermbonceonce.litmus
View File

@ -13,14 +13,14 @@ C MP+fencewmbonceonce+fencermbonceonce
int flag;
}
P0(int *buf, int *flag)
P0(int *buf, int *flag) // Producer
{
WRITE_ONCE(*buf, 1);
smp_wmb();
WRITE_ONCE(*flag, 1);
}
P1(int *buf, int *flag)
P1(int *buf, int *flag) // Consumer
{
int r0;
int r1;
@ -30,4 +30,4 @@ P1(int *buf, int *flag)
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
View File

@ -15,13 +15,13 @@ C MP+onceassign+derefonce
int y=0;
}
P0(int *x, int **p)
P0(int *x, int **p) // Producer
{
WRITE_ONCE(*x, 1);
rcu_assign_pointer(*p, x);
}
P1(int *x, int **p)
P1(int *x, int **p) // Consumer
{
int *r0;
int r1;
@ -32,4 +32,4 @@ P1(int *x, int **p)
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
View File

@ -15,7 +15,7 @@ C MP+polockmbonce+poacquiresilsil
int x;
}
P0(spinlock_t *lo, int *x)
P0(spinlock_t *lo, int *x) // Producer
{
spin_lock(lo);
smp_mb__after_spinlock();
@ -23,7 +23,7 @@ P0(spinlock_t *lo, int *x)
spin_unlock(lo);
}
P1(spinlock_t *lo, int *x)
P1(spinlock_t *lo, int *x) // Consumer
{
int r1;
int r2;
@ -34,4 +34,4 @@ P1(spinlock_t *lo, int *x)
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;
}
P0(spinlock_t *lo, int *x)
P0(spinlock_t *lo, int *x) // Producer
{
spin_lock(lo);
WRITE_ONCE(*x, 1);
spin_unlock(lo);
}
P1(spinlock_t *lo, int *x)
P1(spinlock_t *lo, int *x) // Consumer
{
int r1;
int r2;
@ -33,4 +33,4 @@ P1(spinlock_t *lo, int *x)
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
View File

@ -17,7 +17,7 @@ C MP+polocks
int flag;
}
P0(int *buf, int *flag, spinlock_t *mylock)
P0(int *buf, int *flag, spinlock_t *mylock) // Producer
{
WRITE_ONCE(*buf, 1);
spin_lock(mylock);
@ -25,7 +25,7 @@ P0(int *buf, int *flag, spinlock_t *mylock)
spin_unlock(mylock);
}
P1(int *buf, int *flag, spinlock_t *mylock)
P1(int *buf, int *flag, spinlock_t *mylock) // Consumer
{
int r0;
int r1;
@ -36,4 +36,4 @@ P1(int *buf, int *flag, spinlock_t *mylock)
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
View File

@ -12,13 +12,13 @@ C MP+poonceonces
int flag;
}
P0(int *buf, int *flag)
P0(int *buf, int *flag) // Producer
{
WRITE_ONCE(*buf, 1);
WRITE_ONCE(*flag, 1);
}
P1(int *buf, int *flag)
P1(int *buf, int *flag) // Consumer
{
int r0;
int r1;
@ -27,4 +27,4 @@ P1(int *buf, int *flag)
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;
}
P0(int *buf, int *flag)
P0(int *buf, int *flag) // Producer
{
WRITE_ONCE(*buf, 1);
smp_store_release(flag, 1);
}
P1(int *buf, int *flag)
P1(int *buf, int *flag) // Consumer
{
int r0;
int r1;
@ -28,4 +28,4 @@ P1(int *buf, int *flag)
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;
}
P0(int *buf, int *flag, spinlock_t *mylock)
P0(int *buf, int *flag, spinlock_t *mylock) // Consumer
{
int r0;
int r1;
@ -28,7 +28,7 @@ P0(int *buf, int *flag, spinlock_t *mylock)
spin_unlock(mylock);
}
P1(int *buf, int *flag, spinlock_t *mylock)
P1(int *buf, int *flag, spinlock_t *mylock) // Producer
{
spin_lock(mylock);
WRITE_ONCE(*buf, 1);
@ -36,4 +36,4 @@ P1(int *buf, int *flag, spinlock_t *mylock)
WRITE_ONCE(*flag, 1);
}
exists (0:r0=1 /\ 0:r1=0)
exists (0:r0=1 /\ 0:r1=0) (* Bad outcome. *)