NVMe Driver

The Rust NVMe driver is an effort to implement a PCI NVMe driver in safe Rust for use in the Linux Kernel. The purpose of the driver is to provide a vehicle for development of safe Rust abstractions and to prove feasibility of Rust as an implementation language for high performance device drivers.

The Linux Rust NVMe driver lives here. This branch is routinely rebased on upstream Linux releases. Please be aware that the rnvme branch is force pushed without notice. The version based on the deprecated rust branch is available here.

The Rust NVMe driver was originally authored by Wedson Almeida Filho and is now maintained by Andreas Hindborg (Samsung).

The driver is not currently suitable for general use.

Resources

LPC 2022 slides and video

6.14-rc5 Rebase Performance (`rnvme-v6.14-rc5`)

Setup

AMD Ryzen 5 7600
32 GB 4800 MT/s DDR5 on one channel
1x Samsung 990 Pro 1TB (PCIe 4.0 x4 16 GT/S)
NixOS 24.11

Results

40 samples
Difference of means modeled with t-distribution
P95 confidence intervals

The graph shows $\frac{R - C}{C}$ where C is IO/s for the C driver and R is IO/s for the Rust driver. Thus, negative means the C driver is faster while positive means the Rust driver is faster.

6.13 Rebase Performance (`rnvme-v6.13`)

Setup

AMD Ryzen 5 7600
32 GB 4800 MT/s DDR5 on one channel
1x Samsung 990 Pro 1TB (PCIe 4.0 x4 16 GT/S)
NixOS 24.11

Results

40 samples
Difference of means modeled with t-distribution
P95 confidence intervals

The graph shows $\frac{R - C}{C}$ where C is IO/s for the C driver and R is IO/s for the Rust driver. Thus, negative means the C driver is faster while positive means the Rust driver is faster.

6.12 Rebase Performance (`rnvme-v6.12`)

Setup

AMD Ryzen 5 7600
32 GB 4800 MT/s DDR5 on one channel
1x Samsung 990 Pro 1TB (PCIe 4.0 x4 16 GT/S)
NixOS 24.04

Results

40 samples
Difference of means modeled with t-distribution
P95 confidence intervals

The graph shows $\frac{R - C}{C}$ where C is IO/s for the C driver and R is IO/s for the Rust driver. Thus, negative means the C driver is faster while positive means the Rust driver is faster.

6.12-rc2 Rebase Performance (`rnvme-v6.12-rc2`)

Setup

AMD Ryzen 5 7600
32 GB 4800 MT/s DDR5 on one channel
1x Samsung 990 Pro 1TB (PCIe 4.0 x4 16 GT/S)
NixOS 24.05

Results

40 samples
Difference of means modeled with t-distribution
P95 confidence intervals

The graph shows $\frac{R - C}{C}$ where C is IO/s for the C driver and R is IO/s for the Rust driver. Thus, negative means the C driver is faster while positive means the Rust driver is faster.

6.11 Rebase Performance (`rnvme-v6.11`)

Setup

AMD Ryzen 5 7600
32 GB 4800 MT/s DDR5 on one channel
1x Samsung 990 Pro 1TB (PCIe 4.0 x4 16 GT/S)
NixOS 24.05

Results

40 samples
Difference of means modeled with t-distribution
P95 confidence intervals

The graph shows $\frac{R - C}{C}$ where C is IO/s for the C driver and R is IO/s for the Rust driver. Thus, negative means the C driver is faster while positive means the Rust driver is faster.

6.11-rc2 Rebase Performance (`rnvme-v6.11-rc2`)

Setup

AMD Ryzen 5 7600
32 GB 4800 MT/s DDR5 on one channel
1x Samsung 990 Pro 1TB (PCIe 4.0 x4 16 GT/S)
NixOS 24.05

Results

40 samples
Difference of means modeled with t-distribution
P95 confidence intervals

The graph shows $\frac{R - C}{C}$ where C is IO/s for the C driver and R is IO/s for the Rust driver. Thus, negative means the C driver is faster while positive means the Rust driver is faster.

6.10 Rebase Performance (`rnvme-v6.10`)

Setup

AMD Ryzen 5 7600
32 GB 4800 MT/s DDR5 on one channel
1x Samsung 990 Pro 1TB (PCIe 4.0 x4 16 GT/S)
NixOS 24.05

Results

40 samples
Difference of means modeled with t-distribution
P95 confidence intervals

The graph shows $\frac{R - C}{C}$ where C is IO/s for the C driver and R is IO/s for the Rust driver. Thus, negative means the C driver is faster while positive means the Rust driver is faster.

6.10-rc5 Rebase Performance (`rnvme-v6.10-rc5`)

Setup

AMD Ryzen 5 7600
32 GB 4800 MT/s DDR5 on one channel
1x Samsung 990 Pro 1TB (PCIe 4.0 x4 16 GT/S)
NixOS 24.05

Results

40 samples
Difference of means modeled with t-distribution
P95 confidence intervals

The graph shows $\frac{R - C}{C}$ where C is IO/s for the C driver and R is IO/s for the Rust driver. Thus, negative means the C driver is faster while positive means the Rust driver is faster.

6.9 Rebase Performance (`rnvme-v6.9`)

Setup

AMD Ryzen 5 7600
32 GB 4800 MT/s DDR5 on one channel
1x Samsung 990 Pro 1TB (PCIe 4.0 x4 16 GT/S)
NixOS 24.05

Results

40 samples
Difference of means modeled with t-distribution
P95 confidence intervals

The graph shows $\frac{R - C}{C}$ where C is IO/s for the C driver and R is IO/s for the Rust driver. Thus, negative means the C driver is faster while positive means the Rust driver is faster.

6.8 Rebase Performance (`rnvme-v6.8`)

Setup

AMD Ryzen 5 7600
32 GB 4800 MT/s DDR5 on one channel
1x Samsung 990 Pro 1TB (PCIe 4.0 x4 16 GT/S)
NixOS 23.11

Results

40 samples
Difference of means modeled with t-distribution
P95 confidence intervals

The graph shows $\frac{R - C}{C}$ where C is IO/s for the C driver and R is IO/s for the Rust driver. Thus, negative means the C driver is faster while positive means the Rust driver is faster.

6.7 Rebase Performance (`nvme-6.7`)

Setup

12th Gen Intel(R) Core(TM) i5-12600
32 GB DRAM
1x INTEL MEMPEK1W016GA (PCIe 3.0 x2)
Debian Bullseye userspace
LTO results are enabled by a build system patch (a hack) that was not yet published.

Results

30 samples
Difference of means modeled with t-distribution
P99 confidence intervals

Difference Relative

Plot shows (mean_iops_r - mean_iops_c) / mean_iops_c'

Performance November 2023 (`nvme-6.6`)

Setup

12th Gen Intel(R) Core(TM) i5-12600
32 GB DRAM
1x INTEL MEMPEK1W016GA (PCIe 3.0 x2)
Debian Bullseye userspace
LTO results are enabled by a build system patch (a hack) that was not yet published.