<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> </head> <body> Hi Juan, Thank you for your changes ! I am getting married on day 20 Nov, I guess will not be able to put the necessary attention level to this subject as I should, at least in the short period. Sorry about it, I have risen the issue It should be my duty to follow it closely up to resolution. Also, i think it is a very important subject. In the last days I had some private communications with Bruce and Dave (in CC), i report a very short summary here since it might be useful for further development. ----- executive summary ------- We checked the status of the matter in Squeak, which has progressed in this respect in recent times. 1] After and experiment made by Bruce on MST/MDT time change we are confident the code in Squeak is able keep "the date updated" on Daylight time change, automatically. GOOD ! 2] If one changes the time zone manually, Squeak can't detect it. One must call the primitive `Time primitiveUpdateTimeZone.` . In my opinion this is much less important than point [1]. 3] Dave knows very well the new Squeak implementation ---------------------------------------- I will try to do some experiments myself as soon as i can ! Bye Nicola <div class="moz-cite-prefix">On 11/9/21 22:19, Juan Vuletich wrote: </div> <blockquote type="cite" cite="mid:618AE5F4.9010908@jvuletich.org"> <meta content="text/html; charset=UTF-8" http-equiv="Content-Type"> <title></title> After comments from Gerald (below) and Dave (at the opensmalltalk-vm issue you opened), this is my take. This touches a rather basic area of the system, so any bug could affect a lot of code. Folks, please, review. Thanks, On 11/3/2021 1:08 PM, Nicola Mingotti via Cuis-dev wrote: <blockquote cite="mid:026c85bb-8524-da32-a191-4e8b5649d232@gmail.com" type="cite"> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> I put it here: <a moz-do-not-send="true" class="moz-txt-link-freetext" href="https://github.com/OpenSmalltalk/opensmalltalk-vm/issues/602">https://github.com/OpenSmalltalk/opensmalltalk-vm/issues/602</a> bye Nicola <div class="moz-cite-prefix">On 11/3/21 16:51, Nicola Mingotti wrote: </div> <blockquote type="cite" cite="mid:a07a47d5-9c0f-0d5c-2bbc-479b6c89bbfc@gmail.com"> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> Hi Gerald ! thank you for looking into it ! for me this is still too much above my head, I have not tweaked the VM up to now, and this seems a central subject that should be taken care by somebody who understands well the possible consequences of a change. I am going to forward the problem to the vm mailing list. bye Nicola <div class="moz-cite-prefix">On 11/3/21 12:05, Gerald Klix wrote: </div> <blockquote type="cite" cite="mid:5e6701a6-7039-4729-d033-d3d77a95ef61@klix.ch">Nicola, If you look at <a class="moz-txt-link-freetext" href="https://github.com/OpenSmalltalk/opensmalltalk-vm/blob/634e4e3c8556a72d54f43beefc3069c60e594a21/platforms/unix/vm/sqUnixHeartbeat.c#L139" moz-do-not-send="true">https://github.com/OpenSmalltalk/opensmalltalk-vm/blob/634e4e3c8556a72d54f43beefc3069c60e594a21/platforms/unix/vm/sqUnixHeartbeat.c#L139</a> you see that "vmGMTOffset" is added to the new time. "vmGMTOffset" is updated here: <a class="moz-txt-link-freetext" href="https://github.com/OpenSmalltalk/opensmalltalk-vm/blob/634e4e3c8556a72d54f43beefc3069c60e594a21/platforms/unix/vm/sqUnixHeartbeat.c#L150" moz-do-not-send="true">https://github.com/OpenSmalltalk/opensmalltalk-vm/blob/634e4e3c8556a72d54f43beefc3069c60e594a21/platforms/unix/vm/sqUnixHeartbeat.c#L150</a> which is only called during VM initialization: <a class="moz-txt-link-freetext" href="https://github.com/OpenSmalltalk/opensmalltalk-vm/blob/634e4e3c8556a72d54f43beefc3069c60e594a21/platforms/unix/vm/sqUnixHeartbeat.c#L273" moz-do-not-send="true">https://github.com/OpenSmalltalk/opensmalltalk-vm/blob/634e4e3c8556a72d54f43beefc3069c60e594a21/platforms/unix/vm/sqUnixHeartbeat.c#L273</a> All this is only an educated guess. HTH, Gerald PS: This is really nasty, it may also ignore leap seconds: <a class="moz-txt-link-freetext" href="https://github.com/OpenSmalltalk/opensmalltalk-vm/blob/634e4e3c8556a72d54f43beefc3069c60e594a21/platforms/unix/vm/sqUnixHeartbeat.c#L135" moz-do-not-send="true">https://github.com/OpenSmalltalk/opensmalltalk-vm/blob/634e4e3c8556a72d54f43beefc3069c60e594a21/platforms/unix/vm/sqUnixHeartbeat.c#L135</a> On 11/3/21 10:56 AM, Nicola Mingotti via Cuis-dev wrote: <blockquote type="cite"> Hi guys, I report you what i discovered this morning. . I have 2 services running in Cuis in 2 independent Linux/Debian servers. . In weekend in Italy we changed time from CEST to CET . The OSes changed time correctly . But Cuis services are 1 hour forward !?!? . If i run a fresh new Cuis now in my laptop (Linux/debian vm), I see it has the correct time, corresponding to the OS time . I did not change my localTimeZone in Cuis, in any machine. It is acceptable for me it says UTC even if it is actually localtime. . Seeing 'DateAndTime now' I discovered that Cuis by default uses primLocalMicrosecondClock, so it should always use the OS local clock and think it is in the UTC timezone. But, it is not doing so on images that were started some days ago (max 20). It does so on new run images. I don't know well how to fix this. Maybe some time config is made when Cuis starts up? It seems it is remembering the time when it was stared. EXTRA. NOT IMPORTANT AS THE PREVIOUS. If there are some changes to make I have a suggestion for improvement. Could we set localTimeZone to "system", or "local" ? At present we are reading localTime from the OS and setting to UTC. Which is a bit confusing. bye Nicola </blockquote> </blockquote> </blockquote> </blockquote> <pre class="moz-signature" cols="72">-- Juan Vuletich <a class="moz-txt-link-abbreviated" href="http://www.cuis-smalltalk.org" moz-do-not-send="true">www.cuis-smalltalk.org</a> <a class="moz-txt-link-freetext" href="https://github.com/Cuis-Smalltalk/Cuis-Smalltalk-Dev" moz-do-not-send="true">https://github.com/Cuis-Smalltalk/Cuis-Smalltalk-Dev</a> <a class="moz-txt-link-freetext" href="https://github.com/jvuletich" moz-do-not-send="true">https://github.com/jvuletich</a> <a class="moz-txt-link-freetext" href="https://www.linkedin.com/in/juan-vuletich-75611b3" moz-do-not-send="true">https://www.linkedin.com/in/juan-vuletich-75611b3</a> @JuanVuletich</pre> </blockquote> </body> </html>