Contract type : Fixed-term contract
Level of qualifications required : Graduate degree or equivalent
Fonction : PhD Position
Level of experience : Recently graduated
About the research centre or Inria department
Grenoble Rhône-Alpes Research Center groups together a few less than 650 people in 37 research teams and 8 research support departments.
Staff is localized on 5 campuses in Grenoble and Lyon, in close collaboration with labs, research and higher education institutions in Grenoble and Lyon, but also with the economic players in these areas.
Present in the fields of software, high-performance computing, Internet of things, image and data, but also simulation in oceanography and biology, it participates at the best level of international scientific achievements and collaborations in both Europe and the rest of the world.
- Polytrace Inria exploratory action, which investiguates how compilers can exploit runtime analysis on several execution traces to infer a general code optimization scheme.
- Collaboration with Waseda University, Tokyo, Japan
Compilers must restructure the application to use as best as possible computing and storage resources. In general, parallel runtimes (interpreters) do a better job than compilers, as the availability of dynamic informations (variable values, tests, loop iterations) make possible to make the right decisions. However, runtimes come with an overhead, which push them to coarse-grain task scheduling, while compilers are usually in charge of mapping the tasks to computation units (GPU, FPGA, etc) and then to extract fine-grain parallelism. We focus on programs from the polyhedral model, where the operations of the execution trace depends only on input size and where the compilation schemes are affine functions (schedule, resource allocation, etc). We believe this will make possible to obtain levels of optimizations out-of-reach by a purely static compilation.
In this PhD thesis, we focus in the inference of high-performance computing compilation schemes, thanks to dynamic analysis on a selection of execution traces. The PhD student will revisit the key ingredients of parallel/optimizing compilers: data placement, computation scheduling and partitionning and code generation. In particular, the PhD student will investiguate how to select execution traces to ensure code coverage and how to extrapolate the results of dynamic analysis to polyhedral compilation mappings. A compilation infrastructure will be built on top of LLVM to validate the results on the polyhedral compilation benchmarks.
Notions in compilers, experience with C++
- Subsidized meals
- Partial reimbursement of public transport costs
- Leave: 7 weeks of annual leave + 10 extra days off due to RTT (statutory reduction in working hours) + possibility of exceptional leave (sick children, moving home, etc.)
- Possibility of teleworking (after 6 months of employment) and flexible organization of working hours
- Professional equipment available (videoconferencing, loan of computer equipment, etc.)
- Social, cultural and sports events and activities
- Access to vocational training
- Social security coverage
1st and 2nd year: 1 982 euros brut /month
3rd year: 2 085 euros brut / month
- Theme/Domain : Architecture, Languages and Compilation
- Town/city : Lyon
- Inria Center : CRI Grenoble - Rhône-Alpes
- Starting date : 2021-09-01
- Duration of contract : 3 years
- Deadline to apply : 2021-09-01
Inria is the French national research institute dedicated to digital science and technology. It employs 2,600 people. Its 200 agile project teams, generally run jointly with academic partners, include more than 3,500 scientists and engineers working to meet the challenges of digital technology, often at the interface with other disciplines. The Institute also employs numerous talents in over forty different professions. 900 research support staff contribute to the preparation and development of scientific and entrepreneurial projects that have a worldwide impact.
Instruction to apply
Important information concerning the COVID-19 epidemic: in case the rules by the French government and Inria related to the epidemic make it impossible for the candidate to physically start the position at Inria Grenoble, the position will start with teleworking.
Defence Security :
This position is likely to be situated in a restricted area (ZRR), as defined in Decree No. 2011-1425 relating to the protection of national scientific and technical potential (PPST).Authorisation to enter an area is granted by the director of the unit, following a favourable Ministerial decision, as defined in the decree of 3 July 2012 relating to the PPST. An unfavourable Ministerial decision in respect of a position situated in a ZRR would result in the cancellation of the appointment.
Recruitment Policy :
As part of its diversity policy, all Inria positions are accessible to people with disabilities.
Warning : you must enter your e-mail address in order to save your application to Inria. Applications must be submitted online on the Inria website. Processing of applications sent from other channels is not guaranteed.