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Message-Id: <20201105220017.15410-8-paulmck@kernel.org>
Date: Thu, 5 Nov 2020 14:00:17 -0800
From: paulmck@...nel.org
To: linux-kernel@...r.kernel.org, linux-arch@...r.kernel.org,
kernel-team@...com, mingo@...nel.org
Cc: stern@...land.harvard.edu, parri.andrea@...il.com, will@...nel.org,
peterz@...radead.org, boqun.feng@...il.com, npiggin@...il.com,
dhowells@...hat.com, j.alglave@....ac.uk, luc.maranget@...ia.fr,
akiyks@...il.com, "Paul E. McKenney" <paulmck@...nel.org>
Subject: [PATCH memory-model 8/8] tools/memory-model: Label MP tests' producers and consumers
From: "Paul E. McKenney" <paulmck@...nel.org>
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@...xchg.org>
Signed-off-by: Paul E. McKenney <paulmck@...nel.org>
---
.../litmus-tests/MP+fencewmbonceonce+fencermbonceonce.litmus | 6 +++---
tools/memory-model/litmus-tests/MP+onceassign+derefonce.litmus | 6 +++---
.../litmus-tests/MP+polockmbonce+poacquiresilsil.litmus | 6 +++---
.../memory-model/litmus-tests/MP+polockonce+poacquiresilsil.litmus | 6 +++---
tools/memory-model/litmus-tests/MP+polocks.litmus | 6 +++---
tools/memory-model/litmus-tests/MP+poonceonces.litmus | 6 +++---
.../memory-model/litmus-tests/MP+pooncerelease+poacquireonce.litmus | 6 +++---
tools/memory-model/litmus-tests/MP+porevlocks.litmus | 6 +++---
8 files changed, 24 insertions(+), 24 deletions(-)
diff --git a/tools/memory-model/litmus-tests/MP+fencewmbonceonce+fencermbonceonce.litmus b/tools/memory-model/litmus-tests/MP+fencewmbonceonce+fencermbonceonce.litmus
index f15e501..c5c168d 100644
--- a/tools/memory-model/litmus-tests/MP+fencewmbonceonce+fencermbonceonce.litmus
+++ b/tools/memory-model/litmus-tests/MP+fencewmbonceonce+fencermbonceonce.litmus
@@ -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. *)
diff --git a/tools/memory-model/litmus-tests/MP+onceassign+derefonce.litmus b/tools/memory-model/litmus-tests/MP+onceassign+derefonce.litmus
index ed8ee9b..20ff626 100644
--- a/tools/memory-model/litmus-tests/MP+onceassign+derefonce.litmus
+++ b/tools/memory-model/litmus-tests/MP+onceassign+derefonce.litmus
@@ -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. *)
diff --git a/tools/memory-model/litmus-tests/MP+polockmbonce+poacquiresilsil.litmus b/tools/memory-model/litmus-tests/MP+polockmbonce+poacquiresilsil.litmus
index b1b1266..153917a 100644
--- a/tools/memory-model/litmus-tests/MP+polockmbonce+poacquiresilsil.litmus
+++ b/tools/memory-model/litmus-tests/MP+polockmbonce+poacquiresilsil.litmus
@@ -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. *)
diff --git a/tools/memory-model/litmus-tests/MP+polockonce+poacquiresilsil.litmus b/tools/memory-model/litmus-tests/MP+polockonce+poacquiresilsil.litmus
index 867c75d..aad6439 100644
--- a/tools/memory-model/litmus-tests/MP+polockonce+poacquiresilsil.litmus
+++ b/tools/memory-model/litmus-tests/MP+polockonce+poacquiresilsil.litmus
@@ -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. *)
diff --git a/tools/memory-model/litmus-tests/MP+polocks.litmus b/tools/memory-model/litmus-tests/MP+polocks.litmus
index 4b0c2ed..21cbca6 100644
--- a/tools/memory-model/litmus-tests/MP+polocks.litmus
+++ b/tools/memory-model/litmus-tests/MP+polocks.litmus
@@ -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. *)
diff --git a/tools/memory-model/litmus-tests/MP+poonceonces.litmus b/tools/memory-model/litmus-tests/MP+poonceonces.litmus
index 3010bba..9f9769d 100644
--- a/tools/memory-model/litmus-tests/MP+poonceonces.litmus
+++ b/tools/memory-model/litmus-tests/MP+poonceonces.litmus
@@ -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. *)
diff --git a/tools/memory-model/litmus-tests/MP+pooncerelease+poacquireonce.litmus b/tools/memory-model/litmus-tests/MP+pooncerelease+poacquireonce.litmus
index 21e825d..cbe28e7 100644
--- a/tools/memory-model/litmus-tests/MP+pooncerelease+poacquireonce.litmus
+++ b/tools/memory-model/litmus-tests/MP+pooncerelease+poacquireonce.litmus
@@ -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. *)
diff --git a/tools/memory-model/litmus-tests/MP+porevlocks.litmus b/tools/memory-model/litmus-tests/MP+porevlocks.litmus
index 9691d55..012041b 100644
--- a/tools/memory-model/litmus-tests/MP+porevlocks.litmus
+++ b/tools/memory-model/litmus-tests/MP+porevlocks.litmus
@@ -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. *)
--
2.9.5
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