February 2019 - Pharo-dev - lists.pharo.org

Re: [Pharo-dev] Spotter shortcut reset

by Nicolas Cellier

Ben, The figures in the table are quite linear. Duration * rate = constant. It's just that you want to plot 1/ duration or 1/ rate if you don't want to see an hyperbole xÃy=cte Le dim. 3 fÃ©vr. 2019 Ã 12:17, ducasse <stepharo(a)netcourrier.com> a Ã©crit : > Wouahhhhhh you are not playing :) > This is cool. > My network at home is lame to the dispear of my sons. > > Stef > > > On 3 Feb 2019, at 12:06, Ben Coman <btc(a)openinworld.com> wrote: > > > On Sat, 2 Feb 2019 at 18:54, ducasse <stepharo(a)netcourrier.com> wrote: > > On Sat, 2 Feb 2019 at 11:01, Ben Coman <btc(a)openinworld.com> wrote: > > > > > I am getting network errors trying to download latest Pharo Launcher, > > > > can you tell me how so that I try to reproduce it? > > Since network performance depends a lot on location, and presuming you'd > need to be at my house to reproduce my experience, > I spent the afternoon learning about AWS so I could do some testing from a > Australian based cloud box > that you should be able to reproduce fairly easily, since this was my > first time using AWS. > > With this 10 minute tutorial... > [Launch a Linux Virtual Machine]( > https://aws.amazon.com/getting-started/tutorials/launch-a-virtual-machine/ > ) > 1. Signed up and signed in > Tip: I struggled a long while looping on "Sign in with root account > credentials" until I discovered I needed to use the email address I signed > up with, not the account name. > > [Edit:] In the top right between account name and support, > pulled down list and selected "Asia Pacfic (Sydney)" > > > 2. Clicked "Launch a virtual machine" > (note, that only seems to show up for blank account, otherwise its "Launch > Instance" > > > 3. Ticked "Free tier only" filter. > + Selected "Amazon Linux 2 AMI (HVM), SSD Volume Type" > + Clicked <Review and Launch> (used default t2.micro) > + Clicked <Launch> > + From the pull-down selected "Create a new key pair", > gave it a name and clicked <Download Keypair> saved as > "SydneyPharoSpeedTest.pem" > + Clicked <Launch Instance> > + Clicked <View Instances> > noted instance... > * IP address: 54.252.136.78 > * Zone: ap-southeast-2b > * Security Group: Launch Wizard 1 > > 4. On my Windows 10 box, in WSL did... > $ cd ~/.ssh # if it doesn't exist, first do... mkdir -m 700 ~/.ssh > $ cp /mnt/c/Users/Ben/Downloads/SydneyPharoSpeedTest.pem ~/.ssh > $ chmod 400 ~/.ssh/SydneyPharoSpeedTest.pem > $ ssh -i ~/.ssh/SydneyPharoSpeedTest.pem ubuntu(a)54.252.136.78$ cat > /etc/os-release > ID="amzn" > ID_LIKE="centos rhel fedora" > > > GOOD NETWORK BASELINE TEST... > Ignoring any packet loss on poor networks, first testing low bandwidths on > a good network > $ vi test.sh > #!/bin/sh > if [ -d out ]; then > dirdate=`stat -c %z out | awk '{print $1"-"$2}' ` > mv out out.${dirdate} > fi > mkdir out > for RATE in 1000k 500k 200k 100k 50k 20k 10k 5k 2k 1k > do > echo $RATE > /usr/bin/time -f "%e" -o out/time.$RATE \ > wget --quiet --limit-rate $RATE > https://files.pharo.org/pharo-launcher/1.6/pharo-launcher-1.6.msi -O > out/file.$RATE & > done > > $ sh test.sh > monitoring with... > $ cat out/time* | sort -n > $ ls -lS out > > results in following table and graphs... > $RATE > (kb/s) TIME > (s) TIME > (min) TIME > (hr) > 1000 54 1 0.0 > 500 105 2 0.0 > 200 259 4 0.1 > 100 515 9 0.1 > 50 1029 17 0.3 > 20 2576 43 0.7 > 10 5149 86 1.4 > 5 10527 175 2.9 > > <download-speed.png> > > Wow that surprised me. I'm not sure what the behaviour of file servers at > low bandwidth should be, > but intuitively the above seems odd. In the past troubleshooting seems to > have been > focused on the cause of slow speeds, but these can occur for many reasons > unrelated to the > the file server. The above test ignores cause to isolate behaviour at > slow speeds. > > I forgot my own download speed yesterday (today is okay), but here is > another sample... > "(in Argentina) it is really slow ... 3.5KB/s ... average 10KB/s". > http://forum.world.st/Pharo-Downloads-are-sluggish-td5084963.html > > I would hope that download time was near linear with speed all the way > down to 1kb/s. > Anyone have some sysadmins they can lean on to understand if that is > realistic? > > The straightness of the line using a log-log axis makes it seem like > policy rather than physics. > <download-speed(log).png> > > HTH, > cheers -ben > > >

Feb. 3, 2019

Re: [Pharo-dev] Spotter shortcut reset

by Ben Coman

On Sun, 3 Feb 2019 at 23:25, webwarrior <reg(a)webwarrior.ws> wrote: > Ben Coman wrote > > On Sat, 2 Feb 2019 at 18:54, ducasse < > > > stepharo@ > > > > wrote: > > > > ... > > > > 3. Ticked "Free tier only" filter. > > + Selected "Amazon Linux 2 AMI (HVM), SSD Volume Type" > > + Clicked > > <Review and Launch> > > (used default t2.micro) > > + Clicked > > <Launch> > > + From the pull-down selected "Create a new key pair", > > gave it a name and clicked > > <Download Keypair> > > saved as > > "SydneyPharoSpeedTest.pem" > > + Clicked > > <Launch Instance> > > + Clicked > > <View Instances> > > noted instance... > > * IP address: 54.252.136.78 > > * Zone: ap-southeast-2b > > * Security Group: Launch Wizard 1 > > > > 4. On my Windows 10 box, in WSL did... > > $ cd ~/.ssh # if it doesn't exist, first do... mkdir -m 700 > ~/.ssh > > $ cp /mnt/c/Users/Ben/Downloads/SydneyPharoSpeedTest.pem ~/.ssh > > $ chmod 400 ~/.ssh/SydneyPharoSpeedTest.pem > > $ ssh -i ~/.ssh/SydneyPharoSpeedTest.pem ubuntu(a)54.252.136.78$ cat > > /etc/os-release > > ID="amzn" > > ID_LIKE="centos rhel fedora" > > > > > > GOOD NETWORK BASELINE TEST... > > Ignoring any packet loss on poor networks, first testing low bandwidths > on > > a good network > > $ vi test.sh > > #!/bin/sh > > if [ -d out ]; then > > dirdate=`stat -c %z out | awk '{print $1"-"$2}' ` > > mv out out.${dirdate} > > fi > > mkdir out > > for RATE in 1000k 500k 200k 100k 50k 20k 10k 5k 2k 1k > > do > > echo $RATE > > /usr/bin/time -f "%e" -o out/time.$RATE \ > > wget --quiet --limit-rate $RATE > > https://files.pharo.org/pharo-launcher/1.6/pharo-launcher-1.6.msi -O > > out/file.$RATE & > > done > > > > $ sh test.sh > > monitoring with... > > $ cat out/time* | sort -n > > $ ls -lS out > > > > results in following table and graphs... > > $RATE > > (kb/s) TIME > > (s) TIME > > (min) TIME > > (hr) > > 1000 54 1 0.0 > > 500 105 2 0.0 > > 200 259 4 0.1 > > 100 515 9 0.1 > > 50 1029 17 0.3 > > 20 2576 43 0.7 > > 10 5149 86 1.4 > > 5 10527 175 2.9 > > > > [image: download-speed.png] > > > > Wow that surprised me. I'm not sure what the behaviour of file servers > at > > low bandwidth should be, > > but intuitively the above seems odd. In the past troubleshooting seems > to > > have been > > focused on the cause of slow speeds, but these can occur for many reasons > > unrelated to the > > the file server. The above test ignores cause to isolate behaviour at > > slow > > speeds. > > > > I forgot my own download speed yesterday (today is okay), but here is > > another sample... > > "(in Argentina) it is really slow ... 3.5KB/s ... average 10KB/s". > > http://forum.world.st/Pharo-Downloads-are-sluggish-td5084963.html > > > > I would hope that download time was near linear with speed all the way > > down > > to 1kb/s. > > Anyone have some sysadmins they can lean on to understand if that is > > realistic? > > > > The straightness of the line using a log-log axis makes it seem like > > policy > > rather than physics. > > [image: download-speed(log).png] > > > > HTH, > > cheers -ben > > > > > > download-speed.png (39K) > > <http://forum.world.st/attachment/5094677/0/download-speed.png> > > download-speed(log).png (34K) > > < > http://forum.world.st/attachment/5094677/1/download-speed%28log%29.png> > > Why does that surprise you? > > Download time [s] = amount of data [B] / bandwidth [B/s]. > Your data and graphs look exactly like they should. When bandwidth -> 0, > time > -> +infinity. > Hey! Thanks for that reality check. 100kb ==> 515s 10kb ==> 5149s duh! makes perfect sense. I was sure I had checked that simple scaling and it had been out by another magnitude, but I must have had a screw loose from being too caught up in the graph. It was just meant to be a prelude baseline before playing with random packet loss. Sorry for the noise. cheers -ben

Feb. 3, 2019

Re: [Pharo-dev] Spotter shortcut reset

by webwarrior

Ben Coman wrote > On Sat, 2 Feb 2019 at 18:54, ducasse < > stepharo@ > > wrote: > > ... > > 3. Ticked "Free tier only" filter. > + Selected "Amazon Linux 2 AMI (HVM), SSD Volume Type" > + Clicked > <Review and Launch> > (used default t2.micro) > + Clicked > <Launch> > + From the pull-down selected "Create a new key pair", > gave it a name and clicked > <Download Keypair> > saved as > "SydneyPharoSpeedTest.pem" > + Clicked > <Launch Instance> > + Clicked > <View Instances> > noted instance... > * IP address: 54.252.136.78 > * Zone: ap-southeast-2b > * Security Group: Launch Wizard 1 > > 4. On my Windows 10 box, in WSL did... > $ cd ~/.ssh # if it doesn't exist, first do... mkdir -m 700 ~/.ssh > $ cp /mnt/c/Users/Ben/Downloads/SydneyPharoSpeedTest.pem ~/.ssh > $ chmod 400 ~/.ssh/SydneyPharoSpeedTest.pem > $ ssh -i ~/.ssh/SydneyPharoSpeedTest.pem ubuntu(a)54.252.136.78$ cat > /etc/os-release > ID="amzn" > ID_LIKE="centos rhel fedora" > > > GOOD NETWORK BASELINE TEST... > Ignoring any packet loss on poor networks, first testing low bandwidths on > a good network > $ vi test.sh > #!/bin/sh > if [ -d out ]; then > dirdate=`stat -c %z out | awk '{print $1"-"$2}' ` > mv out out.${dirdate} > fi > mkdir out > for RATE in 1000k 500k 200k 100k 50k 20k 10k 5k 2k 1k > do > echo $RATE > /usr/bin/time -f "%e" -o out/time.$RATE \ > wget --quiet --limit-rate $RATE > https://files.pharo.org/pharo-launcher/1.6/pharo-launcher-1.6.msi -O > out/file.$RATE & > done > > $ sh test.sh > monitoring with... > $ cat out/time* | sort -n > $ ls -lS out > > results in following table and graphs... > $RATE > (kb/s) TIME > (s) TIME > (min) TIME > (hr) > 1000 54 1 0.0 > 500 105 2 0.0 > 200 259 4 0.1 > 100 515 9 0.1 > 50 1029 17 0.3 > 20 2576 43 0.7 > 10 5149 86 1.4 > 5 10527 175 2.9 > > [image: download-speed.png] > > Wow that surprised me. I'm not sure what the behaviour of file servers at > low bandwidth should be, > but intuitively the above seems odd. In the past troubleshooting seems to > have been > focused on the cause of slow speeds, but these can occur for many reasons > unrelated to the > the file server. The above test ignores cause to isolate behaviour at > slow > speeds. > > I forgot my own download speed yesterday (today is okay), but here is > another sample... > "(in Argentina) it is really slow ... 3.5KB/s ... average 10KB/s". > http://forum.world.st/Pharo-Downloads-are-sluggish-td5084963.html > > I would hope that download time was near linear with speed all the way > down > to 1kb/s. > Anyone have some sysadmins they can lean on to understand if that is > realistic? > > The straightness of the line using a log-log axis makes it seem like > policy > rather than physics. > [image: download-speed(log).png] > > HTH, > cheers -ben > > > download-speed.png (39K) > <http://forum.world.st/attachment/5094677/0/download-speed.png> > download-speed(log).png (34K) > <http://forum.world.st/attachment/5094677/1/download-speed%28log%29.png> Why does that surprise you? Download time [s] = amount of data [B] / bandwidth [B/s]. Your data and graphs look exatly like they should. When bandwidth -> 0, time -> +infinity. -- Sent from: http://forum.world.st/Pharo-Smalltalk-Developers-f1294837.html

Feb. 3, 2019

Re: [Pharo-dev] Spotter shortcut reset

by ducasse

I asked christophe to not miss your email and see if this is something from our side. Stef > On 3 Feb 2019, at 12:06, Ben Coman <btc(a)openinworld.com> wrote: > > > On Sat, 2 Feb 2019 at 18:54, ducasse <stepharo(a)netcourrier.com <mailto:stepharo@netcourrier.com>> wrote: > > On Sat, 2 Feb 2019 at 11:01, Ben Coman <btc(a)openinworld.com <mailto:btc@openinworld.com>> wrote: > > > > > I am getting network errors trying to download latest Pharo Launcher, > > > > can you tell me how so that I try to reproduce it? > > Since network performance depends a lot on location, and presuming you'd > need to be at my house to reproduce my experience, > I spent the afternoon learning about AWS so I could do some testing from a Australian based cloud box > that you should be able to reproduce fairly easily, since this was my first time using AWS. > > With this 10 minute tutorial... > [Launch a Linux Virtual Machine](https://aws.amazon.com/getting-started/tutorials/launch-a-virtual-… <https://aws.amazon.com/getting-started/tutorials/launch-a-virtual-machine/>) > 1. Signed up and signed in > Tip: I struggled a long while looping on "Sign in with root account credentials" until I discovered I needed to use the email address I signed up with, not the account name. > > [Edit:] In the top right between account name and support, > pulled down list and selected "Asia Pacfic (Sydney)" > > > 2. Clicked "Launch a virtual machine" > (note, that only seems to show up for blank account, otherwise its "Launch Instance" > > > 3. Ticked "Free tier only" filter. > + Selected "Amazon Linux 2 AMI (HVM), SSD Volume Type" > + Clicked <Review and Launch> (used default t2.micro) > + Clicked <Launch> > + From the pull-down selected "Create a new key pair", > gave it a name and clicked <Download Keypair> saved as "SydneyPharoSpeedTest.pem" > + Clicked <Launch Instance> > + Clicked <View Instances> > noted instance... > * IP address: 54.252.136.78 > * Zone: ap-southeast-2b > * Security Group: Launch Wizard 1 > > 4. On my Windows 10 box, in WSL did... > $ cd ~/.ssh # if it doesn't exist, first do... mkdir -m 700 ~/.ssh > $ cp /mnt/c/Users/Ben/Downloads/SydneyPharoSpeedTest.pem ~/.ssh > $ chmod 400 ~/.ssh/SydneyPharoSpeedTest.pem > $ ssh -i ~/.ssh/SydneyPharoSpeedTest.pem ubuntu(a)54.252.136.78 <mailto:ubuntu@54.252.136.78>$ cat /etc/os-release > ID="amzn" > ID_LIKE="centos rhel fedora" > > > GOOD NETWORK BASELINE TEST... > Ignoring any packet loss on poor networks, first testing low bandwidths on a good network > $ vi test.sh > #!/bin/sh > if [ -d out ]; then > dirdate=`stat -c %z out | awk '{print $1"-"$2}' ` > mv out out.${dirdate} > fi > mkdir out > for RATE in 1000k 500k 200k 100k 50k 20k 10k 5k 2k 1k > do > echo $RATE > /usr/bin/time -f "%e" -o out/time.$RATE \ > wget --quiet --limit-rate $RATE https://files.pharo.org/pharo-launcher/1.6/pharo-launcher-1.6.msi <https://files.pharo.org/pharo-launcher/1.6/pharo-launcher-1.6.msi> -O out/file.$RATE & > done > > $ sh test.sh > monitoring with... > $ cat out/time* | sort -n > $ ls -lS out > > results in following table and graphs... > $RATE > (kb/s) TIME > (s) TIME > (min) TIME > (hr) > 1000 54 1 0.0 > 500 105 2 0.0 > 200 259 4 0.1 > 100 515 9 0.1 > 50 1029 17 0.3 > 20 2576 43 0.7 > 10 5149 86 1.4 > 5 10527 175 2.9 > > <download-speed.png> > > Wow that surprised me. I'm not sure what the behaviour of file servers at low bandwidth should be, > but intuitively the above seems odd. In the past troubleshooting seems to have been > focused on the cause of slow speeds, but these can occur for many reasons unrelated to the > the file server. The above test ignores cause to isolate behaviour at slow speeds. > > I forgot my own download speed yesterday (today is okay), but here is another sample... > "(in Argentina) it is really slow ... 3.5KB/s ... average 10KB/s". > http://forum.world.st/Pharo-Downloads-are-sluggish-td5084963.html <http://forum.world.st/Pharo-Downloads-are-sluggish-td5084963.html> > > I would hope that download time was near linear with speed all the way down to 1kb/s. > Anyone have some sysadmins they can lean on to understand if that is realistic? > > The straightness of the line using a log-log axis makes it seem like policy rather than physics. > <download-speed(log).png> > > HTH, > cheers -ben

Feb. 3, 2019

Re: [Pharo-dev] Contribute to pharo8.0 ?

by ducasse

Hello ritesh Do you mean that you do not succeed to send a PR? Can you describe what you did because with the latest image guille fixed the iceberg bug. Stef > On 3 Feb 2019, at 12:25, Ritesh Saini <prideofelites(a)gmail.com> wrote: > > Having the same issue. Canât fix! Tried everything :( > > Regards, > Ritesh > adsense high paying keywords <https://www.digitalkube.com/highest-paying-adsense-niches/>

Feb. 3, 2019

Re: [Pharo-dev] Contribute to pharo8.0 ?

by Ritesh Saini

Having the same issue. Canât fix! Tried everything :( Regards, Ritesh adsense high paying keywords <https://www.digitalkube.com/highest-paying-adsense-niches/>

Feb. 3, 2019

Re: [Pharo-dev] Spotter shortcut reset

by ducasse

Wouahhhhhh you are not playing :) This is cool. My network at home is lame to the dispear of my sons. Stef > On 3 Feb 2019, at 12:06, Ben Coman <btc(a)openinworld.com> wrote: > > > On Sat, 2 Feb 2019 at 18:54, ducasse <stepharo(a)netcourrier.com <mailto:stepharo@netcourrier.com>> wrote: > > On Sat, 2 Feb 2019 at 11:01, Ben Coman <btc(a)openinworld.com <mailto:btc@openinworld.com>> wrote: > > > > > I am getting network errors trying to download latest Pharo Launcher, > > > > can you tell me how so that I try to reproduce it? > > Since network performance depends a lot on location, and presuming you'd > need to be at my house to reproduce my experience, > I spent the afternoon learning about AWS so I could do some testing from a Australian based cloud box > that you should be able to reproduce fairly easily, since this was my first time using AWS. > > With this 10 minute tutorial... > [Launch a Linux Virtual Machine](https://aws.amazon.com/getting-started/tutorials/launch-a-virtual-… <https://aws.amazon.com/getting-started/tutorials/launch-a-virtual-machine/>) > 1. Signed up and signed in > Tip: I struggled a long while looping on "Sign in with root account credentials" until I discovered I needed to use the email address I signed up with, not the account name. > > [Edit:] In the top right between account name and support, > pulled down list and selected "Asia Pacfic (Sydney)" > > > 2. Clicked "Launch a virtual machine" > (note, that only seems to show up for blank account, otherwise its "Launch Instance" > > > 3. Ticked "Free tier only" filter. > + Selected "Amazon Linux 2 AMI (HVM), SSD Volume Type" > + Clicked <Review and Launch> (used default t2.micro) > + Clicked <Launch> > + From the pull-down selected "Create a new key pair", > gave it a name and clicked <Download Keypair> saved as "SydneyPharoSpeedTest.pem" > + Clicked <Launch Instance> > + Clicked <View Instances> > noted instance... > * IP address: 54.252.136.78 > * Zone: ap-southeast-2b > * Security Group: Launch Wizard 1 > > 4. On my Windows 10 box, in WSL did... > $ cd ~/.ssh # if it doesn't exist, first do... mkdir -m 700 ~/.ssh > $ cp /mnt/c/Users/Ben/Downloads/SydneyPharoSpeedTest.pem ~/.ssh > $ chmod 400 ~/.ssh/SydneyPharoSpeedTest.pem > $ ssh -i ~/.ssh/SydneyPharoSpeedTest.pem ubuntu(a)54.252.136.78 <mailto:ubuntu@54.252.136.78>$ cat /etc/os-release > ID="amzn" > ID_LIKE="centos rhel fedora" > > > GOOD NETWORK BASELINE TEST... > Ignoring any packet loss on poor networks, first testing low bandwidths on a good network > $ vi test.sh > #!/bin/sh > if [ -d out ]; then > dirdate=`stat -c %z out | awk '{print $1"-"$2}' ` > mv out out.${dirdate} > fi > mkdir out > for RATE in 1000k 500k 200k 100k 50k 20k 10k 5k 2k 1k > do > echo $RATE > /usr/bin/time -f "%e" -o out/time.$RATE \ > wget --quiet --limit-rate $RATE https://files.pharo.org/pharo-launcher/1.6/pharo-launcher-1.6.msi <https://files.pharo.org/pharo-launcher/1.6/pharo-launcher-1.6.msi> -O out/file.$RATE & > done > > $ sh test.sh > monitoring with... > $ cat out/time* | sort -n > $ ls -lS out > > results in following table and graphs... > $RATE > (kb/s) TIME > (s) TIME > (min) TIME > (hr) > 1000 54 1 0.0 > 500 105 2 0.0 > 200 259 4 0.1 > 100 515 9 0.1 > 50 1029 17 0.3 > 20 2576 43 0.7 > 10 5149 86 1.4 > 5 10527 175 2.9 > > <download-speed.png> > > Wow that surprised me. I'm not sure what the behaviour of file servers at low bandwidth should be, > but intuitively the above seems odd. In the past troubleshooting seems to have been > focused on the cause of slow speeds, but these can occur for many reasons unrelated to the > the file server. The above test ignores cause to isolate behaviour at slow speeds. > > I forgot my own download speed yesterday (today is okay), but here is another sample... > "(in Argentina) it is really slow ... 3.5KB/s ... average 10KB/s". > http://forum.world.st/Pharo-Downloads-are-sluggish-td5084963.html <http://forum.world.st/Pharo-Downloads-are-sluggish-td5084963.html> > > I would hope that download time was near linear with speed all the way down to 1kb/s. > Anyone have some sysadmins they can lean on to understand if that is realistic? > > The straightness of the line using a log-log axis makes it seem like policy rather than physics. > <download-speed(log).png> > > HTH, > cheers -ben

Feb. 3, 2019

Re: [Pharo-dev] Spotter shortcut reset

by Ben Coman

On Sat, 2 Feb 2019 at 18:54, ducasse <stepharo(a)netcourrier.com> wrote: > On Sat, 2 Feb 2019 at 11:01, Ben Coman <btc(a)openinworld.com> wrote: > > > I am getting network errors trying to download latest Pharo Launcher, > > can you tell me how so that I try to reproduce it? Since network performance depends a lot on location, and presuming you'd need to be at my house to reproduce my experience, I spent the afternoon learning about AWS so I could do some testing from a Australian based cloud box that you should be able to reproduce fairly easily, since this was my first time using AWS. With this 10 minute tutorial... [Launch a Linux Virtual Machine]( https://aws.amazon.com/getting-started/tutorials/launch-a-virtual-machine/) 1. Signed up and signed in Tip: I struggled a long while looping on "Sign in with root account credentials" until I discovered I needed to use the email address I signed up with, not the account name. [Edit:] In the top right between account name and support, pulled down list and selected "Asia Pacfic (Sydney)" 2. Clicked "Launch a virtual machine" (note, that only seems to show up for blank account, otherwise its "Launch Instance" 3. Ticked "Free tier only" filter. + Selected "Amazon Linux 2 AMI (HVM), SSD Volume Type" + Clicked <Review and Launch> (used default t2.micro) + Clicked <Launch> + From the pull-down selected "Create a new key pair", gave it a name and clicked <Download Keypair> saved as "SydneyPharoSpeedTest.pem" + Clicked <Launch Instance> + Clicked <View Instances> noted instance... * IP address: 54.252.136.78 * Zone: ap-southeast-2b * Security Group: Launch Wizard 1 4. On my Windows 10 box, in WSL did... $ cd ~/.ssh # if it doesn't exist, first do... mkdir -m 700 ~/.ssh $ cp /mnt/c/Users/Ben/Downloads/SydneyPharoSpeedTest.pem ~/.ssh $ chmod 400 ~/.ssh/SydneyPharoSpeedTest.pem $ ssh -i ~/.ssh/SydneyPharoSpeedTest.pem ubuntu(a)54.252.136.78$ cat /etc/os-release ID="amzn" ID_LIKE="centos rhel fedora" GOOD NETWORK BASELINE TEST... Ignoring any packet loss on poor networks, first testing low bandwidths on a good network $ vi test.sh #!/bin/sh if [ -d out ]; then dirdate=`stat -c %z out | awk '{print $1"-"$2}' ` mv out out.${dirdate} fi mkdir out for RATE in 1000k 500k 200k 100k 50k 20k 10k 5k 2k 1k do echo $RATE /usr/bin/time -f "%e" -o out/time.$RATE \ wget --quiet --limit-rate $RATE https://files.pharo.org/pharo-launcher/1.6/pharo-launcher-1.6.msi -O out/file.$RATE & done $ sh test.sh monitoring with... $ cat out/time* | sort -n $ ls -lS out results in following table and graphs... $RATE (kb/s) TIME (s) TIME (min) TIME (hr) 1000 54 1 0.0 500 105 2 0.0 200 259 4 0.1 100 515 9 0.1 50 1029 17 0.3 20 2576 43 0.7 10 5149 86 1.4 5 10527 175 2.9 [image: download-speed.png] Wow that surprised me. I'm not sure what the behaviour of file servers at low bandwidth should be, but intuitively the above seems odd. In the past troubleshooting seems to have been focused on the cause of slow speeds, but these can occur for many reasons unrelated to the the file server. The above test ignores cause to isolate behaviour at slow speeds. I forgot my own download speed yesterday (today is okay), but here is another sample... "(in Argentina) it is really slow ... 3.5KB/s ... average 10KB/s". http://forum.world.st/Pharo-Downloads-are-sluggish-td5084963.html I would hope that download time was near linear with speed all the way down to 1kb/s. Anyone have some sysadmins they can lean on to understand if that is realistic? The straightness of the line using a log-log axis makes it seem like policy rather than physics. [image: download-speed(log).png] HTH, cheers -ben

Feb. 3, 2019

Re: [Pharo-dev] Debugger opening on user halt and not Object>>halt

by Sean P. DeNigris

Ben Coman wrote > It seem to already do this? Cool! That is new. In 6.1, it opened on DNU ----- Cheers, Sean -- Sent from: http://forum.world.st/Pharo-Smalltalk-Developers-f1294837.html

Feb. 2, 2019

Re: [Pharo-dev] [Pharo-users] Class name with diacritic character and Pharo

by Hilaire

Cool. Attached a stack of the execution exposing the problem. BenoÃ®t sent it to me. It should give some clues. Hilaire Le 02/02/2019 Ã 09:50, Sven Van Caekenberghe a Ã©critÂ : > That is also an already existing problem, it has to do with the decoding of environment variables. > > If I find the time, I will try to do a couple of tests this WE. -- Dr. Geo http://drgeo.eu

Feb. 2, 2019