Supercomputers/Systems/Cerrillos
USA · decommissioned · hpc
Cerrillos
Also known as LANL Cerrillos; Roadrunner sibling
Operated by Los Alamos National Laboratory .
Researched with AI assistance, checked by scripts. These rows were researched by AI agents reading public operator, laboratory and vendor sources, appended by scripts and checked by automated validation; no subject-matter expert has reviewed them (how this site is made). A mechanical second-reader pass has since fetched every cited source: 1350 of 1540 systems have a readable citation that names them, and 64 are genuinely weakly sourced. Every claim carries its source and a confidence tier. Treat anything below verified as a lead, not a citation.
Measured performance
- Rmax
- 63.25 TFlop/s
- Rpeak
- 80.93 TFlop/s
- Rmax ÷ Rpeak
- 78.2%
- Cores
- 7,200
- Power
- 138 kW
- Per watt
- 0.5 GF/W
Figures are as last publicly reported for the configuration described below, not a live measurement. Where a system was upgraded in place, the post-upgrade configuration is shown and the earlier one appears in the timeline.
What this machine is made of
One row per supplier relationship. “Supplier at build” is the company that shipped the part at the time; where that company has since been acquired, the parent it rolls up to today is shown beside it. That distinction is what makes ticker-level aggregation possible across a thirty-year dataset.
| Role | Part | Supplier at build | Quantity | Confidence | Source |
|---|---|---|---|---|---|
| Integrator | - IBM BladeCenter QS22/LS21 cluster, 448 blades salvaged for Narwhal | IBM | - | Reported | top500.orgcmu.edu |
| Accelerator | IBM PowerXCell 8i Accelerators Cell BE (PPE + 8 SPE) · 9C · 3.2 GHz · 65 nm · 92 W IBM PowerXCell 8i 3.2 GHz | IBM | - | Reported | top500.orgcmu.edu |
| CPU | - AMD Opteron dual-core 1.8 GHz in LS21 blades | AMD | - | Reported | top500.org |
The read
Smaller stablemate of Roadrunner (see roadrunner) at Los Alamos, using the same hybrid design of IBM BladeCenter QS22 blades with PowerXCell 8i processors at 3.2 GHz paired with LS21 Opteron blades at 1.8 GHz over InfiniBand. A Carnegie Mellon release of July 2014 says Cerrillos supported non-classified research at LANL and that Roadrunner and Cerrillos were both taken offline 'last year', which gives the 2013 decommissioning year recorded here; CMU then built its Narwhal cluster (1,792 cores) from 448 blades salvaged from Cerrillos. CMU quotes 14,400 cores for Cerrillos while TOP500 lists 7,200, and neither source says how cores were counted, so the TOP500 figure is used. TOP500 lists 63.25 TFlop/s Rmax, 80.93 peak and a stated 138 kW, ranked 42nd in November 2008 and 61st in June 2009, its last list. The accelerator part is IBM's PowerXCell 8i as in the Roadrunner record.
Timeline
- 2008 First operational source
- 2008-11 List debut at #42 (November 2008) source
- 2013 Decommissioned source
Public list appearances
Pointers only: rank and edition, linking to the canonical entry. We do not reproduce list tables. See sourcing policy.
Change history
- 2026-10-17 Cerrillos added from its source pages
Source check
We fetched this system's own citations and recorded whether each page actually mentions it. This is a corroboration signal, not a fact check, and it is published so you can see how well the sourcing holds up rather than take it on trust.
| Cited source | Result | Found on the page |
|---|---|---|
| cmu.edu | names system only | - |
| top500.org | names system and part | IBM PowerXCell 8i |
Checked 2026-10-18 by pnpm verify. Re-run it and the table changes with the web.