Supercomputers/Systems/Okeanos
Poland · operational · hpc
Okeanos
Also known as ICM Okeanos
Operated by ICM University of Warsaw .
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
- 909.61 TFlop/s
- Rpeak
- 1.08 PFlop/s
- Rmax ÷ Rpeak
- 84.0%
- Cores
- 26,016
- Power
- 585.36 kW
- Per watt
- 1.6 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 | - Cray XC40 supercomputer with 1,084 compute nodes | Cray HPENYSE
rolls up to Hewlett Packard Enterprise | - | Verified | top500.orgkdm.icm.edu.pl |
| CPU | Intel Xeon E5-2690 v3 CPUs x86-64 · 12C · 2.6 GHz · 22 nm · 135 W Intel Xeon E5-2690v3 12C 2.6GHz, two per node, 1,084 nodes | Intel | 2,168 reported | Verified | kdm.icm.edu.pltop500.org |
| Interconnect | Cray Aries Interconnect Dragonfly · About 10 GB/s per direction · Around 1 microsecond Cray Aries network with Dragonfly topology | Cray HPENYSE
rolls up to Hewlett Packard Enterprise | - | Verified | kdm.icm.edu.pltop500.org |
| Operating system | Cray Linux Environment Operating systems Linux, Cray-customised · Proprietary layer over open-source Linux Cray Linux Environment | Cray HPENYSE
rolls up to Hewlett Packard Enterprise | - | Reported | top500.org |
The read
Cray XC40 at the University of Warsaw ICM: 1,084 compute nodes with two 12-core Xeon E5-2690v3 (26,016 cores) and 128 GB each on the Cray Aries Dragonfly network. ICM states it has been operational since July 2016, and the node and core counts match TOP500. TOP500 lists it from 109th in June 2016 (best rank, used here) down to 480th in November 2018 with an unchanged 0.91 PFlop/s Rmax and 1.08 PFlop/s Rpeak; the 585.36 kW power figure is from TOP500.
Timeline
Public list appearances
Pointers only: rank and edition, linking to the canonical entry. We do not reproduce list tables. See sourcing policy.
Change history
- 2026-10-07 Added Okeanos, a mid-list TOP500 system (2016-06 109)
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 |
|---|---|---|
| kdm.icm.edu.pl | names system and part | Intel Xeon E5-2690 v3, Cray Aries, Cray Linux Environment |
| top500.org | names system and part | Intel Xeon E5-2690 v3, Cray Aries, Cray Linux Environment |
Checked 2026-10-09 by pnpm verify. Re-run it and the table changes with the web.
Further reading
Operating a supercomputer
Acceptance testing, why "installed" and "in production" are six months apart, and the machine lifecycle.
Inside a node
Latency-optimised versus throughput-optimised processors, NUMA, and the end of the host-to-device copy.
The interconnect
Topologies, why latency and tail behaviour matter more than bandwidth, and how the fabric market consolidated.