Supercomputers/Systems/Stallo
Norway · operational · hpc
Stallo
Also known as Stallo (University of Tromso)
Operated by University of Tromso at Sigma2 / UiT (Tromso) .
Phase 1 seed dataset, compiled by hand. These rows were built from public operator, laboratory and vendor sources. A mechanical second-reader pass has since fetched every cited source: 1092 of 1153 systems have a readable citation that names them, and 40 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
- 31.86 TFlop/s
- Rpeak
- 59.92 TFlop/s
- Rmax ÷ Rpeak
- 53.2%
- Cores
- 5,632
- Power
- -
- Per watt
- - 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 | - HP Cluster Platform 3000 BL460c blade cluster | Hewlett Packard Enterprise | - | Reported | top500.org |
| CPU | - Intel Xeon X5355 quad-core 2.67 GHz, 5,632 cores | Intel | - | Reported | top500.org |
The read
HP BladeSystem c-Class cluster at the University of Tromso for the Norwegian Notur resources. Sigma2's history page states that Stallo, an HP BL 460c system, is installed at the University of Tromso; a Wikipedia article gives 10 December 2007 as its start of use and later expansion to 9,184 cores, which this entry does not describe. TOP500 lists 5,632 Xeon X5355 quad-core 2.67 GHz cores on Gigabit Ethernet at 31.86 TFlop/s Rmax and 59.92 TFlop/s Rpeak, 62nd in June 2008 (83rd in November 2007 at an initial 14.47 TFlop/s), then 82nd, 140th and 193rd, and last appeared in November 2010 at 458th. TOP500 is the only source for the performance figures, so the tier is reported.
Timeline
Public list appearances
Pointers only: rank and edition, linking to the canonical entry. We do not reproduce list tables. See sourcing policy.
Site & facility
Change history
- 2026-10-09 Added Stallo
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 |
|---|---|---|
| sigma2.no | names system only | - |
| top500.org | names system only | - |
Checked 2026-10-09 by pnpm verify. Re-run it and the table changes with the web.