Re: Re: ARP Table size
"Tom Collins tom-lnEA/wrDJtNWk0Htik3J/[email protected] [rabbit-semi]" <[email protected]> Mon, 25 Mar 2019 15:42:10 -0700
| Newsgroups | gmane.comp.hardware.rabbit-semiconductor |
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| Message-ID | <[email protected]> |
--Apple-Mail=_1FE99A66-A7A5-47CF-B4C4-F2068BBE5859 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=utf-8 Steve, The increase is likely related to the memory layout and how the processor i= s mapping physical addresses to root and xmem. With separate I&D disabled, the first 52KB of address space is for combined= root code and constants. The other 12KB go to stack (4KB) and XMEM (8KB?)= .. There might be another 4KB area that I=E2=80=99m forgetting about, with = XMEM only getting a 4KB window. With separate I&D enabled, I believe you have 52KB for root code and an add= itional 52KB for root constants mapped into the first 64KB. It=E2=80=99s a= lso possible that you end up getting more space for root variables, I can= =E2=80=99t entirely recall that mapping. So the increase in file size probably means you have a lot of unused 4KB pa= ges in those two root memory areas of 52KB. As you add more root constants= and code, they will grow to fill the unused pages and your file size shoul= dn=E2=80=99t change. You could take a look at the .map file to get an idea of how it=E2=80=99s m= apping root addresses to physical addresses. I think there are also some s= amples that print out reports of memory mapping/usage that could help expla= in the change as well. -Tom > On Mar 20, 2019, at 8:07 AM, seecwriter-/[email protected] [rabbit-semi] <rabbit-s= [email protected]> wrote: >=20 > Correction. The 52k increase in executable size was due to enabling separ= ate instruction and data spaces. When I increased the ARP table to 128, I g= ot an "Out of variable data space" error. Enabling separate instruction and= data spaces removes the error.=20 >=20 >=20 >=20 > So now the question is, why should enabling separate instruction and data= spaces increase the executable by 52k? Leaving the ARP at 64, there should= be no increase in size, just a rearrangement of the code and data. >=20 >=20 --Apple-Mail=_1FE99A66-A7A5-47CF-B4C4-F2068BBE5859 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/htm= l4/strict.dtd"> <html> <head> </head> =20 <body style=3D"background-color: #fff;"> <span style=3D"display:none"> </span> <!--~-|**|PrettyHtmlStartT|**|-~--> <div id=3D"ygrp-mlmsg" style=3D"position:relative;"> <div id=3D"ygrp-msg" style=3D"z-index: 1;"> <!--~-|**|PrettyHtmlEndT|**|-~--> <div id=3D"ygrp-text" > =20=20=20=20=20=20 =20=20=20=20=20=20 <p>Steve,<div class><br class></div><div class>The increase is likely= related to the memory layout and how the processor is mapping physical add= resses to root and xmem.</div><div class><br class></div><div class>With se= parate I&D disabled, the first 52KB of address space is for combined ro= ot code and constants. The other 12KB go to stack (4KB) and XMEM (8KB= ?). There might be another 4KB area that I=E2=80=99m forgetting about= , with XMEM only getting a 4KB window.</div><div class><br class></div><div= class>With separate I&D enabled, I believe you have 52KB for root code= and an additional 52KB for root constants mapped into the first 64KB. &nbs= p;It=E2=80=99s also possible that you end up getting more space for root va= riables, I can=E2=80=99t entirely recall that mapping.</div><div class><br = class></div><div class>So the increase in file size probably means you have= a lot of unused 4KB pages in those two root memory areas of 52KB. As= you add more root constants and code, they will grow to fill the unused pa= ges and your file size shouldn=E2=80=99t change.</div><div class><br class>= </div><div class>You could take a look at the .map file to get an idea of h= ow it=E2=80=99s mapping root addresses to physical addresses. I think= there are also some samples that print out reports of memory mapping/usage= that could help explain the change as well.</div><div class><br class><div= class> <span class=3D"Apple-style-span" style=3D"border-collapse: separate;color: = rgb(0, 0, 0);font-family: Helvetica;font-size: 12px;font-style: normal;font= -variant: normal;font-weight: normal;letter-spacing: normal;text-align: aut= o;text-indent: 0px;"><div class>-Tom</div><br class=3D"Apple-interchange-ne= wline"></span> </div> <div><br class><blockquote type=3D"cite" class><div class>On Mar 20, 2019, = at 8:07 AM, <a href=3D"mailto:seecwriter-/[email protected]" class>seecwriter@yahoo.= com</a> [rabbit-semi] <<a href=3D"mailto:[email protected]" cl= ass>[email protected]</a>> wrote:</div><br class=3D"Apple-inte= rchange-newline"><div class><p style=3D"margin: 0px 0px 1em;font-family: Ge= orgia;font-size: 13px;font-style: normal;font-weight: normal;letter-spacing= : normal;text-align: start;text-indent: 0px;text-transform: none;white-spac= e: normal;" class>Correction. The 52k increase in executable size was due t= o enabling separate instruction and data spaces. When I increased the ARP t= able to 128, I got an "Out of variable data space" error. Enabling separate= instruction and data spaces removes the error.<span class=3D"Apple-convert= ed-space"> </span></p><p style=3D"margin: 0px 0px 1em;font-family: Geo= rgia;font-size: 13px;font-style: normal;font-weight: normal;letter-spacing:= normal;text-align: start;text-indent: 0px;text-transform: none;white-space= : normal;" class><br class></p><p style=3D"margin: 0px 0px 1em;font-family:= Georgia;font-size: 13px;font-style: normal;font-weight: normal;letter-spac= ing: normal;text-align: start;text-indent: 0px;text-transform: none;white-s= pace: normal;" class>So now the question is, why should enabling separate i= nstruction and data spaces increase the executable by 52k? Leaving the ARP = at 64, there should be no increase in size, just a r<span style=3D"font-fam= ily: Calibri, sans-serif;font-size: 11pt;" class>earrangement<span class=3D= "Apple-converted-space"> </span></span>of the code and data.</p><br cl= ass=3D"Apple-interchange-newline"></div></blockquote></div><br class></div>= </p> </div> =20=20=20=20=20 <!--~-|**|PrettyHtmlStart|**|-~--> <div style=3D"color: #fff; height: 0;">__._,_.___</div> =20=20=20=20=20=20=20=20=20=20 =20=20 =20 =20=20=20=20 <div style=3D"clear:both"> </div> <div id=3D"fromDMARC" style=3D"margin-top: 10px;"> <hr style=3D"height:2px ; border-width:0; color:#E3E3E3; background= -color:#E3E3E3;"> Posted by: Tom Collins <tom-lnEA/wrDJtNWk0Htik3J/[email protected]> <hr style=3D= "height:2px ; border-width:0; color:#E3E3E3; background-color:#E3E3E3;"> </div> <div style=3D"clear:both"> </div> <table cellspacing=3D4px style=3D"margin-top: 10px; margin-bottom: 10px= ; color: #2D50FD;"> <tbody> <tr> <td style=3D"font-size: 12px; font-family: arial; font-weight: bo= ld; padding: 7px 5px 5px;" > <a style=3D"text-decoration: none; color: #2D50FD= " href=3D"https://groups.yahoo.com/neo/groups/rabbit-semi/conversations/mes= sages/42518;_ylc=3DX3oDMTJxOTlyajI0BF9TAzk3MzU5NzE0BGdycElkAzIzMDczMTYEZ3Jw= c3BJZAMxNzA2NTU0MjA1BG1zZ0lkAzQyNTE4BHNlYwNmdHIEc2xrA3JwbHkEc3RpbWUDMTU1MzU= 1Mzc0Mg--?act=3Dreply&messageNum=3D42518">Reply via web post</a> </td> <td>•</td> <td style=3D"font-size: 12px; font-family: arial; padding: 7px 5p= x 5px;" > <a href=3D"mailto:tom-lnEA/wrDJtNWk0Htik3J/[email protected]?subject=3DRe%3A%20%5Brabbit-= semi%5D%20Re%3A%20ARP%20Table%20size" style=3D"text-decoration: none; color= : #2D50FD;"> Reply to sender </a> </td> <td>•</td> <td style=3D"font-size: 12px; font-family: arial; padding: 7px 5p= x 5px;"> <a href=3D"mailto:[email protected]?subject=3DRe%3A%2= 0%5Brabbit-semi%5D%20Re%3A%20ARP%20Table%20size" style=3D"text-decoration: = none; color: #2D50FD"> Reply to group </a> </td> <td>•</td> <td style=3D"font-size: 12px; font-family: arial; padding: 7px 5p= x 5px;" > <a href=3D"https://groups.yahoo.com/neo/groups/rabbit-semi/conv= ersations/newtopic;_ylc=3DX3oDMTJlbTRmcmZyBF9TAzk3MzU5NzE0BGdycElkAzIzMDczM= TYEZ3Jwc3BJZAMxNzA2NTU0MjA1BHNlYwNmdHIEc2xrA250cGMEc3RpbWUDMTU1MzU1Mzc0Mg--= " style=3D"text-decoration: none; color: #2D50FD">Start a New Topic</a> </td> <td>•</td> <td style=3D"font-size: 12px; font-family: arial; padding: 7px 5p= x 5px;color: #2D50FD;" > <a href=3D"https://groups.yahoo.com/neo/groups/= rabbit-semi/conversations/topics/42515;_ylc=3DX3oDMTM2bHExYXJoBF9TAzk3MzU5N= zE0BGdycElkAzIzMDczMTYEZ3Jwc3BJZAMxNzA2NTU0MjA1BG1zZ0lkAzQyNTE4BHNlYwNmdHIE= c2xrA3Z0cGMEc3RpbWUDMTU1MzU1Mzc0MgR0cGNJZAM0MjUxNQ--" style=3D"text-decorat= ion: none; color: #2D50FD;">Messages in this topic</a> (4) </td> </tr> </tbody> </table> =20=20=20=20=20=20=20=20 <div id=3D"megaphoneModule"> <hr style=3D"height:2px ; border-width:0; color:#E3E3E3; backgr= ound-color:#E3E3E3;"> <div> <div class=3D"stream" style=3D"margin-bottom:10px;"> <div style=3D"background-color:white;"> <div class=3D"sn-img" style=3D"display:inline;"><img name=3D"tn= _file" style=3D"padding:0px 10px;vertical-align:top;margin-top:5px;" src=3D= "https://s.yimg.com/ru/static/images/yg/img/megaphone/1464031581_phpFA8bON"= height=3D"82" width=3D"82"></div> <div class=3D"mod-txt" style=3D"display:inline-block;"> <a rel=3D"nofollow" name=3D"sub_url" target=3D"_blank" href= =3D"https://yho.com/1wwmgg" style=3D"color:#0000FF;display:block;margin-lef= t:5px;text-decoration:none;"><span style=3D"font-size:15px;">Have you tried= the highest rated email app?</span></a> <div style=3D"max-width:530px;padding:2px 5px;">With 4.5 st= ars in iTunes, the Yahoo Mail app is the highest rated email app on the mar= ket. 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