GenericBackendV2 should fail when the backend cannot allocate the basis gate because its size #12653

1ucian0 · 2024-06-25T08:50:53Z

Summary

GenericBackendV2 should not accept backends that are too small for certain gates. The following examples should be rejected:

GenericBackendV2(num_qubits=1, basis_gates=["cx", "id"])

GenericBackendV2(num_qubits=2, basis_gates=["ccx", "id"])

@ElePT found this!

…is gate because its size Co-authored-by: Elena Peña Tapia <57907331+ElePT@users.noreply.github.com>

qiskit-bot · 2024-06-25T08:50:57Z

One or more of the following people are relevant to this code:

@Qiskit/terra-core

coveralls · 2024-06-25T09:16:41Z

Pull Request Test Coverage Report for Build 9659396940

Details

2 of 2 (100.0%) changed or added relevant lines in 1 file are covered.
23 unchanged lines in 3 files lost coverage.
Overall coverage decreased (-0.03%) to 89.729%

Files with Coverage Reduction	New Missed Lines	%
crates/qasm2/src/expr.rs	1	94.02%
crates/qasm2/src/lex.rs	4	92.62%
crates/qasm2/src/parse.rs	18	96.69%

Totals
Change from base Build 9650973845:	-0.03%
Covered Lines:	63758
Relevant Lines:	71056

💛 - Coveralls

ElePT

thanks @1ucian0 LGTM, I left a small reno suggestion (am I allowed to approve?)

releasenotes/notes/fixes_GenericBackendV2-668e40596e1f070d.yaml

coveralls · 2024-06-25T14:05:48Z

Pull Request Test Coverage Report for Build 9663589789

Details

2 of 2 (100.0%) changed or added relevant lines in 1 file are covered.
7 unchanged lines in 2 files lost coverage.
Overall coverage increased (+0.01%) to 89.732%

Files with Coverage Reduction	New Missed Lines	%
crates/qasm2/src/expr.rs	1	94.02%
crates/qasm2/src/lex.rs	6	91.6%

Totals
Change from base Build 9661630219:	0.01%
Covered Lines:	63760
Relevant Lines:	71056

💛 - Coveralls

Co-authored-by: Elena Peña Tapia <57907331+ElePT@users.noreply.github.com>

1ucian0 · 2024-06-25T14:07:20Z

am I allowed to approve?

It seems you are.

coveralls · 2024-06-25T14:31:49Z

Pull Request Test Coverage Report for Build 9663987131

Details

2 of 2 (100.0%) changed or added relevant lines in 1 file are covered.
5 unchanged lines in 2 files lost coverage.
Overall coverage increased (+0.01%) to 89.731%

Files with Coverage Reduction	New Missed Lines	%
crates/qasm2/src/expr.rs	1	94.02%
crates/qasm2/src/lex.rs	4	92.37%

Totals
Change from base Build 9661630219:	0.01%
Covered Lines:	63759
Relevant Lines:	71056

💛 - Coveralls

ElePT · 2024-06-25T16:51:11Z

I think we need to add an internal path for building a target for 1 qubit, because GenericBackendV2 contains 2q basis gates by default (that's why the test fails currently).

coveralls · 2024-06-25T18:44:36Z

Pull Request Test Coverage Report for Build 9667579174

Details

2 of 2 (100.0%) changed or added relevant lines in 1 file are covered.
6 unchanged lines in 1 file lost coverage.
Overall coverage increased (+0.03%) to 89.748%

Files with Coverage Reduction	New Missed Lines	%
crates/qasm2/src/lex.rs	6	92.62%

Totals
Change from base Build 9661630219:	0.03%
Covered Lines:	63771
Relevant Lines:	71056

💛 - Coveralls

1ucian0 · 2024-06-25T19:12:31Z

I think we need to add an internal path for building a target for 1 qubit, because GenericBackendV2 contains 2q basis gates by default (that's why the test fails currently).

I think I prefer to keep the default simple (without different values depending on the number of qubits) and be explicit on the basis _gate (see 43a94f1). What do you think?

ElePT · 2024-06-26T07:41:01Z

I think that can work too. If we see this is causing problems we can always correct the 1q path.

1ucian0 · 2024-06-26T08:37:31Z

@Mergifyio backport stable/0.46 stable/1.1

mergify · 2024-06-26T08:37:41Z

backport stable/0.46 stable/1.1

✅ Backports have been created

#12666 GenericBackendV2 should fail when the backend cannot allocate the basis gate because its size (backport #12653) has been created for branch stable/0.46 but encountered conflicts
#12667 GenericBackendV2 should fail when the backend cannot allocate the basis gate because its size (backport #12653) has been created for branch stable/1.1

…is gate because its size (#12653) * GenericBackendV2 should fail when the backend cannot allocate the basis gate because its size Co-authored-by: Elena Peña Tapia <57907331+ElePT@users.noreply.github.com> * reno * Update releasenotes/notes/fixes_GenericBackendV2-668e40596e1f070d.yaml Co-authored-by: Elena Peña Tapia <57907331+ElePT@users.noreply.github.com> * another single qubit backend --------- Co-authored-by: Elena Peña Tapia <57907331+ElePT@users.noreply.github.com> (cherry picked from commit e36027c)

…is gate because its size (#12653) * GenericBackendV2 should fail when the backend cannot allocate the basis gate because its size Co-authored-by: Elena Peña Tapia <57907331+ElePT@users.noreply.github.com> * reno * Update releasenotes/notes/fixes_GenericBackendV2-668e40596e1f070d.yaml Co-authored-by: Elena Peña Tapia <57907331+ElePT@users.noreply.github.com> * another single qubit backend --------- Co-authored-by: Elena Peña Tapia <57907331+ElePT@users.noreply.github.com> (cherry picked from commit e36027c) # Conflicts: # qiskit/providers/fake_provider/generic_backend_v2.py # test/visual/mpl/graph/test_graph_matplotlib_drawer.py

…is gate because its size (#12653) (#12667) * GenericBackendV2 should fail when the backend cannot allocate the basis gate because its size Co-authored-by: Elena Peña Tapia <57907331+ElePT@users.noreply.github.com> * reno * Update releasenotes/notes/fixes_GenericBackendV2-668e40596e1f070d.yaml Co-authored-by: Elena Peña Tapia <57907331+ElePT@users.noreply.github.com> * another single qubit backend --------- Co-authored-by: Elena Peña Tapia <57907331+ElePT@users.noreply.github.com> (cherry picked from commit e36027c) Co-authored-by: Luciano Bello <bel@zurich.ibm.com>

…is gate because its size (backport #12653) (#12666) * GenericBackendV2 should fail when the backend cannot allocate the basis gate because its size (#12653) * GenericBackendV2 should fail when the backend cannot allocate the basis gate because its size Co-authored-by: Elena Peña Tapia <57907331+ElePT@users.noreply.github.com> * reno * Update releasenotes/notes/fixes_GenericBackendV2-668e40596e1f070d.yaml Co-authored-by: Elena Peña Tapia <57907331+ElePT@users.noreply.github.com> * another single qubit backend --------- Co-authored-by: Elena Peña Tapia <57907331+ElePT@users.noreply.github.com> (cherry picked from commit e36027c) # Conflicts: # qiskit/providers/fake_provider/generic_backend_v2.py # test/visual/mpl/graph/test_graph_matplotlib_drawer.py * Fix Conflict * Update test_graph_matplotlib_drawer.py * black --------- Co-authored-by: Luciano Bello <bel@zurich.ibm.com> Co-authored-by: Elena Peña Tapia <57907331+ElePT@users.noreply.github.com>

…is gate because its size (Qiskit#12653) * GenericBackendV2 should fail when the backend cannot allocate the basis gate because its size Co-authored-by: Elena Peña Tapia <57907331+ElePT@users.noreply.github.com> * reno * Update releasenotes/notes/fixes_GenericBackendV2-668e40596e1f070d.yaml Co-authored-by: Elena Peña Tapia <57907331+ElePT@users.noreply.github.com> * another single qubit backend --------- Co-authored-by: Elena Peña Tapia <57907331+ElePT@users.noreply.github.com>

1ucian0 and others added 2 commits June 25, 2024 10:45

GenericBackendV2 should fail when the backend cannot allocate the bas…

8bcdcbb

…is gate because its size Co-authored-by: Elena Peña Tapia <57907331+ElePT@users.noreply.github.com>

reno

493dc84

1ucian0 requested review from jyu00 and a team as code owners June 25, 2024 08:50

1ucian0 added the Changelog: Bugfix Include in the "Fixed" section of the changelog label Jun 25, 2024

Merge branch 'main' into fixes/GenericBackendV2/1

9913044

ElePT previously approved these changes Jun 25, 2024

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releasenotes/notes/fixes_GenericBackendV2-668e40596e1f070d.yaml Outdated Show resolved Hide resolved

1ucian0 dismissed ElePT’s stale review via c8982a7 June 25, 2024 14:06

Update releasenotes/notes/fixes_GenericBackendV2-668e40596e1f070d.yaml

c8982a7

Co-authored-by: Elena Peña Tapia <57907331+ElePT@users.noreply.github.com>

ElePT previously approved these changes Jun 25, 2024

View reviewed changes

ElePT enabled auto-merge June 25, 2024 14:06

another single qubit backend

43a94f1

1ucian0 dismissed ElePT’s stale review via 43a94f1 June 25, 2024 18:16

ElePT approved these changes Jun 26, 2024

View reviewed changes

ElePT added this pull request to the merge queue Jun 26, 2024

Merged via the queue into Qiskit:main with commit e36027c Jun 26, 2024

This was referenced Jun 26, 2024

GenericBackendV2 should fail when the backend cannot allocate the basis gate because its size (backport #12653) #12666

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GenericBackendV2 should fail when the backend cannot allocate the basis gate because its size (backport #12653) #12667

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