PROJECTS
![cram logo](/sites/default/files/styles/front_page_card/public/cram-llnl-project-card.png?itok=RWMOUnGb)
Cram
Cram lets you easily run many small MPI jobs within a single, large MPI job by splitting MPI_COMM_WORLD up into many small communicators to run each job in the cram file independently.
![stylized photo of computer racks](/sites/default/files/styles/front_page_card/public/libmsr-llnl-project-card.png?itok=qsYbN_mR)
Legacy
libMSR
libMSR provides a convenient interface to access Model Specific Registers and to allow tools to utilize their full functionality.
![caliper logo](/sites/default/files/styles/front_page_card/public/caliper-llnl-project-card.png?itok=LiLfZOef)
Caliper
Caliper enables users to build customized performance measurement and analysis solutions by connecting independent context annotations, measurement services, and data processing services.
NEWS
![Jade supercomputer overlaid with LLNL logo and ISC23 logo](/sites/default/files/styles/front_page_card/public/2023-04/ISC23-comp-leaderboard.png?itok=r6NKJ2Vq)
![Sierra supercomputer](/sites/default/files/styles/front_page_card/public/2023-04/Sierra-comp-leaderboard.png?itok=ruBd6ynj)
How do supercomputers fit with strategies for sustainability?
Supercomputers broke the exascale barrier, marking a new era in processing power, but the energy consumption of such machines cannot run rampant.
![Unidentified employee (Ruth Kilby, possible) with IBM 704, November 1957](/sites/default/files/styles/front_page_card/public/2023-03/women-in-computing-archives-comp1.png?itok=hKSG76M_)
A look back: Women in early computing at LLNL
LLNL’s archives recount the contributions of women who developed code during the Lab's early decades.