Post to all existing and non-existing consumers of the buffer
Previously, producer only post to all current clients of the buffer
except for the producer itself. In this change, producer post to all
existing and non-existing clients of the buffer except for the producer
itself.
Fix: 120869419
Test: Vega is able to recover itself during DON after killing vrcore
or compositor process.
Test: on vega_xr and blueline_xr with the following tests
buffer_hub-test buffer_hub_queue-test dvr_buffer_queue-test
dvr_api-test libdvrtracking-test(vega only) buffer_hub_queue_producer-test
Change-Id: I29f24268b7704fbeb06a4302b11dcd89dd13c133
diff --git a/libs/vr/libbufferhub/buffer_hub-test.cpp b/libs/vr/libbufferhub/buffer_hub-test.cpp
index 1359f4c..487a604 100644
--- a/libs/vr/libbufferhub/buffer_hub-test.cpp
+++ b/libs/vr/libbufferhub/buffer_hub-test.cpp
@@ -361,9 +361,11 @@
ASSERT_TRUE(p.get() != nullptr);
ASSERT_EQ(0, p->GainAsync());
ASSERT_EQ(0, p->Post(LocalHandle()));
- // Producer state bit is in released state after post. The overall state of
- // the buffer is also released because there is no consumer of this buffer.
- ASSERT_TRUE(IsBufferReleased(p->buffer_state()));
+ // Producer state bit is in released state after post, other clients shall be
+ // in posted state although there is no consumer of this buffer yet.
+ ASSERT_TRUE(IsClientReleased(p->buffer_state(), p->client_state_mask()));
+ ASSERT_FALSE(IsBufferReleased(p->buffer_state()));
+ ASSERT_TRUE(AnyClientPosted(p->buffer_state()));
// Gain in released state should succeed.
LocalHandle invalid_fence;
@@ -450,27 +452,17 @@
LocalHandle invalid_fence;
// Post the gained buffer before any consumer gets created.
- // The buffer should be in released state because it is not expected to be
- // read by any clients.
EXPECT_EQ(0, p->PostAsync(&metadata, invalid_fence));
- EXPECT_TRUE(IsBufferReleased(p->buffer_state()));
+ EXPECT_FALSE(IsBufferReleased(p->buffer_state()));
EXPECT_EQ(0, RETRY_EINTR(p->Poll(kPollTimeoutMs)));
- // Newly created consumer will not be signalled for the posted buffer before
- // its creation. It cannot acquire the buffer immediately.
+ // Newly created consumer will be signalled for the posted buffer although it
+ // is created after producer posting.
std::unique_ptr<ConsumerBuffer> c =
ConsumerBuffer::Import(p->CreateConsumer());
ASSERT_TRUE(c.get() != nullptr);
- EXPECT_FALSE(IsClientPosted(c->buffer_state(), c->client_state_mask()));
- EXPECT_EQ(-EBUSY, c->AcquireAsync(&metadata, &invalid_fence));
-
- // Producer should be able to gain back and post the buffer
- EXPECT_EQ(0, p->GainAsync());
- EXPECT_EQ(0, p->PostAsync(&metadata, invalid_fence));
-
- // Consumer should be able to pick up the buffer this time.
+ EXPECT_TRUE(IsClientPosted(c->buffer_state(), c->client_state_mask()));
EXPECT_EQ(0, c->AcquireAsync(&metadata, &invalid_fence));
- EXPECT_TRUE(IsClientAcquired(c->buffer_state(), c->client_state_mask()));
}
TEST_F(LibBufferHubTest, TestCreateConsumerWhenBufferReleased) {
diff --git a/libs/vr/libbufferhub/include/private/dvr/buffer_hub_base.h b/libs/vr/libbufferhub/include/private/dvr/buffer_hub_base.h
index 440a59d..889763a 100644
--- a/libs/vr/libbufferhub/include/private/dvr/buffer_hub_base.h
+++ b/libs/vr/libbufferhub/include/private/dvr/buffer_hub_base.h
@@ -94,6 +94,12 @@
return buffer_state_->load(std::memory_order_acquire);
};
+ // Returns whether the buffer is already released by all current clients.
+ bool is_released() {
+ return (buffer_state() &
+ active_clients_bit_mask_->load(std::memory_order_acquire)) == 0;
+ }
+
// A state mask which is unique to a buffer hub client among all its siblings
// sharing the same concrete graphic buffer.
uint32_t client_state_mask() const { return client_state_mask_; }
diff --git a/libs/vr/libbufferhub/producer_buffer.cpp b/libs/vr/libbufferhub/producer_buffer.cpp
index 5274bf2..edfdddf 100644
--- a/libs/vr/libbufferhub/producer_buffer.cpp
+++ b/libs/vr/libbufferhub/producer_buffer.cpp
@@ -89,13 +89,10 @@
return -EBUSY;
}
- // Set the producer client buffer state to released, other clients' buffer
- // state to posted.
- uint32_t current_active_clients_bit_mask =
- active_clients_bit_mask_->load(std::memory_order_acquire);
- uint32_t updated_buffer_state = current_active_clients_bit_mask &
- (~client_state_mask()) &
- BufferHubDefs::kHighBitsMask;
+ // Set the producer client buffer state to released, that of all other clients
+ // (both existing and non-existing clients) to posted.
+ uint32_t updated_buffer_state =
+ (~client_state_mask()) & BufferHubDefs::kHighBitsMask;
while (!buffer_state_->compare_exchange_weak(
current_buffer_state, updated_buffer_state, std::memory_order_acq_rel,
std::memory_order_acquire)) {
@@ -176,7 +173,9 @@
}
if (BufferHubDefs::AnyClientAcquired(current_buffer_state) ||
BufferHubDefs::AnyClientGained(current_buffer_state) ||
- (BufferHubDefs::AnyClientPosted(current_buffer_state) &&
+ (BufferHubDefs::AnyClientPosted(
+ current_buffer_state &
+ active_clients_bit_mask_->load(std::memory_order_acquire)) &&
!gain_posted_buffer)) {
ALOGE("%s: not released id=%d state=%" PRIx32 ".", __FUNCTION__, id(),
current_buffer_state);
@@ -198,7 +197,9 @@
if (BufferHubDefs::AnyClientAcquired(current_buffer_state) ||
BufferHubDefs::AnyClientGained(current_buffer_state) ||
- (BufferHubDefs::AnyClientPosted(current_buffer_state) &&
+ (BufferHubDefs::AnyClientPosted(
+ current_buffer_state &
+ active_clients_bit_mask_->load(std::memory_order_acquire)) &&
!gain_posted_buffer)) {
ALOGE(
"%s: Failed to gain the buffer. The buffer is no longer released. "