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gonzo

2,445 karma · joined August 19, 2009

jim at netgate.com [ my public key: https://keybase.io/gonzopancho; my proof: https://keybase.io/gonzopancho/sigs/LkeQbQnQ1Ny0-Dm0R1zKm9LAytbjxwVmmsnmJ-7M76I ]
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gonzo··on The Onion buys Infowars
Alex is free to work at the local car wash.
gonzo··on Russian family lived alone in the Siberian wilderness for 40 years (2013)
IDK. The results of the US election could change this, too.
gonzo··on 40 monkeys escape from research facility in South Carolina
It was the 12 Monkeys Army (movie and book) who’s only “terroristic act” was releasing a lot of animals from a zoo.
gonzo··on Arm is canceling Qualcomm's chip design license
> Qualcomm is almost certainly ARM's biggest customer.

You think Qualcomm is larger than Apple?

gonzo··on A novel channel contention mechanism for improving wi-fi's reliability
Most OFDM receivers are EVM-limited though
gonzo··on A novel channel contention mechanism for improving wi-fi's reliability
A token ring like protocol was in an early proposal for what became 802.11
gonzo··on Raspberry Pi Pico does line rate 100M Ethernet
RPi Pico NAS at nearly 600Mbps!

What could go wrong?

gonzo··on Raspberry Pi Pico does line rate 100M Ethernet
This is a lazy definition and won’t get you past “Go” when making network equipment. Why not use 9000 byte “Jumbo” frames? You’ll only need to process 1,383 packets per second to fill the link!
gonzo··on Raspberry Pi Pico does line rate 100M Ethernet
A 1500 byte (octet) MTU frame is 1538 bytes “on the wire”.

7 byte preamble

1 byte SFD

6 byte dst MAC

6 byte src MAC

2 byte ethertype or length

46-1500 bytes of payload (ignoring “Jumbo” frames and 802.1q tags)

4 byte CRC

12 byte IFG (which is silence, but still counts for time on the wire)

Add it up and you have 1538 bytes “on the wire”.

TCP overhead for IPv4 is 20 bytes for IP(v4) (no options) and 20 bytes for TCP (again, no options).

So 1460 bytes of data for 1538 bytes on the wire. 1460/1538 = 0.949284

So for 100M Ethernet, 94.9284Mbps is “perfect”.

gonzo··on Raspberry Pi Pico does line rate 100M Ethernet
“Line rate” is not “fill the link with TCP”. Line rate is “fill the link with 84 octet (including all overhead) frames.”

For 100M Ethernet this requires 148,809 packets per second.

Edit: for 1538 octet frames, one need only process 8,127 packets per second.

gonzo··on FreeBSD-rustdate, a reimplementation of FreeBSD-update
Given the official stance of moving to pkg-base, updating freebsd-update with an incompatible rewrite in Rust seems like yak shaving.
gonzo··on Why are Texas interchanges so tall?
… and the C-stores, and the bars (which are open 24/7).
gonzo··on Why are Texas interchanges so tall?
30 years ago I had one that said, “Fuck you, we’re from Texas.”
gonzo··on Why are Texas interchanges so tall?
Until the wind blows you over the side.

https://www.kxan.com/news/motorcyclist-killed-after-falling-...

She was nice. Worked at a local Taco Deli.

gonzo··on How simultaneous multithreading works under the hood
Intel’s hyperthreading is really a write pipe hack.

It’s not so much cache misses as allowing the core to run something else while the write completes.

This is why some code scales poorly and other code achieves near linear speed ups.

gonzo··on A brief history of Dell Unix (2008)
I didn’t know Chatfield, but I knew Ron McDowell (also mentioned).

Ron passed away in 2012. The last thing he worked on was FreeBSD’s bsdconfig(8).

gonzo··on Convex Architecture Handbook 1984 [pdf]
The second building wasn’t bespoke, it had formerly been a used to manufacture fiberglass pools.

The third building (near the UT Dallas campus) was built for Convex.

Everything was in Richardson, TX, as this was a funding requirement by Sevin-Rosen-Bayless.

Steve’s son Dan is a CS prof at Rice.

gonzo··on We know why some people got Covid while others didn't
Parkinson's disease-associated SNP4 is correlated (r2=0.95) with variants that are associated with HLA-DQA2 expression.

https://www.ncbi.nlm.nih.gov/gene/3118#:~:text=HLA%2DDQA2%20....

gonzo··on Is regulated BGP security coming?
Why pay for something that was never agreed to be so?
gonzo··on Underwater acoustic analysis reveals unique pressure signals – Revisiting MH370
The Royal “we”.
gonzo··on Proxmox VE: Import Wizard for Migrating VMware ESXi VMs
so they sell the husk of VMware back to Dell when they're done.
gonzo··on Baltimore's Key Bridge struck by cargo ship, collapses
You can even get a (2-stroke) Detroit Diesel to run in reverse.

You don’t want to do it very long, because they don’t make oil pressure in reverse.

gonzo··on VPP on FreeBSD
VPP (tnsr) and FreeBSD (pfsense) user / dev here.

The FreeBSD scheduler is at fault here. It’s that simple.

gonzo··on Vice website is shutting down
Pedantically, Unix time measures the number of non-leap seconds that have elapsed since 00:00:00 UTC on 1 January 1970.

This is Dec 31 1969 at 7:00 PM in Eastern Standard Time.

gonzo··on American VC Firms Investing Billions into PRC Companies Fueling the CCP Military
> We're not at war with China!

yet. (?) Seems to be a ton of money being spent to 'defend Taiwan' https://focustaiwan.tw/politics/202312230004

gonzo··on Rivers Cuomo is an active developer on GitHub
She’s not wrong
gonzo··on Gas pumps freeze at Calgary gas stations [video]
ERCOT seems to be well-prepared (pun intended) for this cold snap.
gonzo··on Gas pumps freeze at Calgary gas stations [video]
So Texas / ERCOT isn’t alone, and PG&E isn’t an anomaly.

This is everywhere.

gonzo··on A Brief Retrospective on SPARC Register Windows
> with the first machine, the SPARCstation1 (a.k.a. Sun 4/60, a.k.a Campus), being delivered in 1987.

Quoting WiKipedia:

The original Sun-4 series were VMEbus-based systems similar to the earlier Sun-3 series, but employing microprocessors based on Sun's own SPARC V7 RISC architecture in place of the 68k family processors of previous Sun models.

These all proceeded the 4/60 aka SPARCstation (1), which wasn’t introduced until April 1989.

gonzo··on War of the workstations: How the lowest bidders shaped today's tech landscape
TI Explorer LX machines ran Unix with LISP on top. Very different.
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