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[tf.data] Add vlogging for time spent restoring each stage of a dataset iterator.

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PiperOrigin-RevId: 351396158
Change-Id: I71ff55afa330ec01006cdb2d0b09de1dfba7454f
This commit is contained in:
Andrew Audibert 2021-01-12 10:16:18 -08:00 committed by TensorFlower Gardener
parent dce4796033
commit 62acd0bf19
1 changed files with 20 additions and 4 deletions
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24
tensorflow/core/framework/dataset.h
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@ -665,7 +665,11 @@ class IteratorBase {
// Saves the state of this iterator.
virtual Status Save(SerializationContext* ctx, IteratorStateWriter* writer) {
return SaveInternal(ctx, writer);
int64 start_us = EnvTime::NowMicros();
TF_RETURN_IF_ERROR(SaveInternal(ctx, writer));
VLOG(1) << "Saved " << prefix() << " in "
<< (EnvTime::NowMicros() - start_us) << "us";
return Status::OK();
}
protected:
@ -675,21 +679,33 @@ class IteratorBase {
// Restores the state of this iterator.
Status Restore(IteratorContext* ctx, IteratorStateReader* reader) {
return RestoreInternal(ctx, reader);
int64 start_us = EnvTime::NowMicros();
TF_RETURN_IF_ERROR(RestoreInternal(ctx, reader));
VLOG(1) << "Restored " << prefix() << " in "
<< (EnvTime::NowMicros() - start_us) << "us";
return Status::OK();
}
// This is needed so that sub-classes of IteratorBase can call
// `SaveInternal` on their input iterators.
Status SaveInput(SerializationContext* ctx, IteratorStateWriter* writer,
const std::unique_ptr<IteratorBase>& input) {
return input->SaveInternal(ctx, writer);
int64 start_us = EnvTime::NowMicros();
TF_RETURN_IF_ERROR(input->SaveInternal(ctx, writer));
VLOG(2) << "Saved " << input->prefix() << " in "
<< (EnvTime::NowMicros() - start_us) << "us";
return Status::OK();
}
// This is needed so that sub-classes of IteratorBase can call
// `RestoreInternal` on their input iterators.
Status RestoreInput(IteratorContext* ctx, IteratorStateReader* reader,
const std::unique_ptr<IteratorBase>& input) {
return input->RestoreInternal(ctx, reader);
int64 start_us = EnvTime::NowMicros();
TF_RETURN_IF_ERROR(input->RestoreInternal(ctx, reader));
VLOG(2) << "Restored " << input->prefix() << " in "
<< (EnvTime::NowMicros() - start_us) << "us";
return Status::OK();
}
// Saves the state of this iterator.