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| author | Niall Douglas (s [underscore] sourceforge {at} nedprod [dot] com) <spamtrap@nedprod.com> | 2017-08-23 06:11:19 +0300 |
|---|---|---|
| committer | Niall Douglas (s [underscore] sourceforge {at} nedprod [dot] com) <spamtrap@nedprod.com> | 2017-08-23 06:11:19 +0300 |
| commit | 906cd7a4150518ebcdae081ff091838de539dbd8 (patch) | |
| tree | 3ce1807f8dc8ca72bdd9350f118a59b20a65191b /release_notes.md | |
| parent | 8abd783d7dbdc11323bbfae63173c66da2da4a94 (diff) | |
upd
Diffstat (limited to 'release_notes.md')
| -rw-r--r-- | release_notes.md | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/release_notes.md b/release_notes.md index 90273a84..3017b141 100644 --- a/release_notes.md +++ b/release_notes.md @@ -25,20 +25,20 @@ Manufacturer claimed 4Kb transfer latencies for the physical hardware: - SATA flash drive latency @ QD1: **800us** - NVMe flash drive latency @ QD1: **300us** - RTT UDP packet latency over a LAN: **60us** -- XPoint drive latency @ QD1: **10us** +- NVMe Optane drive latency @ QD1: **10us** - `memcpy(4Kb)` latency: **5us** (main memory) to **1.3us** (L3 cache) - RTT PCIe latency: **0.5us** </td> <td valign="top" width="33%"> 100% read QD1 4Kb direct transfer latencies for the software with AFIO: -- < 99% spinning rust hard drive latency: **TODO** +- < 99% spinning rust hard drive latency: **230,005us** - < 99% SATA flash drive latency: Windows **290us** Linux **158us** Lowest sustained 4Kb read latency benchmarked to date by author (page cache): **7us** (142k IOPS @ QD1, approx 558Mb/sec) </td> <td valign="top" width="33%"> 75% read 25% write QD4 4Kb direct transfer latencies for the software with AFIO: -- < 99% spinning rust hard drive latency: **TODO** +- < 99% spinning rust hard drive latency: **48,185us** - < 99% SATA flash drive latency: Windows **1,812us** Linux **1,416us** Lowest sustained 4Kb write latency benchmarked to date by author (page cache): **7us** (142k IOPS @ QD1, approx 558Mb/sec) |