RC extraction

Justin,

The fields in dbNetExtrRCSummary stand for:
cap_cnt,total_cap,xcap_cnt,total_xcap,res_cnt, total_res

For your previous inquiry regarding how to get the value for all of the nets, I believe you're seeing that dbNetExtrRCSummary does not support wildcard matching for the net names you give it. You can help dbNetExtrRCSummary along by imbedding it within a foreach loop where, by some other means, you've captured the nets you're looking for.

In my design, I have a bussed net called "r697". It looks like this:

[DEV]encounter 21> dbFindNetsByName r697*
{r697[15]} {r697[14]} {r697[13]} {r697[12]} {r697[11]} {r697[10]} {r697[9]} {r697[8]} {r697[7]} {r697[6]} {r697[5]} {r697[4]} {r697[3]} {r697[2]} {r697[1]} {r697[0]}

Once I capture it by wildcard, I can then loop through and call dbNetExtrRCSummary iteratively for each net:

[DEV]encounter 22> foreach net [dbFindNetsByName r697*] {Puts "[dbNetExtrRCSummary $net]"}
42 18.7058 0 0 54 149.339
53 28.6919 0 0 65 168.797
39 11.8179 0 0 50 118.105
47 25.3172 0 0 57 157.352
40 16.1687 0 0 50 137.919
33 16.3909 0 0 46 124.05
39 18.2286 0 0 51 138.262
41 14.0841 0 0 56 153.221
41 14.6328 0 0 51 122
50 20.0135 0 0 63 152.456
38 13.516 0 0 51 132.627
44 19.1988 0 0 57 158.185
45 23.8199 0 0 54 148.814
53 22.2221 0 0 65 163.052
41 19.9921 0 0 55 160.046
50 23.8562 0 0 61 180.404

If the pattern you seek to match is more complicated than simple wildcarding will allow, you could use TCL's generic "regexp" to match the name. Or, you could leverage the dbGet command's support for regexp pattern matching. Say you wanted to get just the bits that start with "[1":

[DEV]encounter 31> dbGet -regexp top.nets.name {r697\[1}
{r697[15]} {r697[14]} {r697[13]} {r697[12]} {r697[11]} {r697[10]} {r697[1]}

[DEV]encounter 34> foreach net [dbGet -regexp top.nets.name {r697\[1}] {puts "[dbNetExtrRCSummary $net]"}
42 18.7058 0 0 54 149.339
53 28.6919 0 0 65 168.797
39 11.8179 0 0 50 118.105
47 25.3172 0 0 57 157.352
40 16.1687 0 0 50 137.919
33 16.3909 0 0 46 124.05
41 19.9921 0 0 55 160.046

From the discussion in this thread it is clear that there is room for improvement in the way RC extraction information is accessible via TCL. As improved capabilities become available in this area, I will post back to this forum with an update. Thanks to all who posted their suggestions on this topic- great discussion!

Hope this helps,
Bob

Justin,

The fields in dbNetExtrRCSummary stand for:
cap_cnt,total_cap,xcap_cnt,total_xcap,res_cnt, total_res

For your previous inquiry regarding how to get the value for all of the nets, I believe you're seeing that dbNetExtrRCSummary does not support wildcard matching for the net names you give it. You can help dbNetExtrRCSummary along by imbedding it within a foreach loop where, by some other means, you've captured the nets you're looking for.

In my design, I have a bussed net called "r697". It looks like this:

[DEV]encounter 21> dbFindNetsByName r697*
{r697[15]} {r697[14]} {r697[13]} {r697[12]} {r697[11]} {r697[10]} {r697[9]} {r697[8]} {r697[7]} {r697[6]} {r697[5]} {r697[4]} {r697[3]} {r697[2]} {r697[1]} {r697[0]}

Once I capture it by wildcard, I can then loop through and call dbNetExtrRCSummary iteratively for each net:

[DEV]encounter 22> foreach net [dbFindNetsByName r697*] {Puts "[dbNetExtrRCSummary $net]"}
42 18.7058 0 0 54 149.339
53 28.6919 0 0 65 168.797
39 11.8179 0 0 50 118.105
47 25.3172 0 0 57 157.352
40 16.1687 0 0 50 137.919
33 16.3909 0 0 46 124.05
39 18.2286 0 0 51 138.262
41 14.0841 0 0 56 153.221
41 14.6328 0 0 51 122
50 20.0135 0 0 63 152.456
38 13.516 0 0 51 132.627
44 19.1988 0 0 57 158.185
45 23.8199 0 0 54 148.814
53 22.2221 0 0 65 163.052
41 19.9921 0 0 55 160.046
50 23.8562 0 0 61 180.404

If the pattern you seek to match is more complicated than simple wildcarding will allow, you could use TCL's generic "regexp" to match the name. Or, you could leverage the dbGet command's support for regexp pattern matching. Say you wanted to get just the bits that start with "[1":

[DEV]encounter 31> dbGet -regexp top.nets.name {r697\[1}
{r697[15]} {r697[14]} {r697[13]} {r697[12]} {r697[11]} {r697[10]} {r697[1]}

[DEV]encounter 34> foreach net [dbGet -regexp top.nets.name {r697\[1}] {puts "[dbNetExtrRCSummary $net]"}
42 18.7058 0 0 54 149.339
53 28.6919 0 0 65 168.797
39 11.8179 0 0 50 118.105
47 25.3172 0 0 57 157.352
40 16.1687 0 0 50 137.919
33 16.3909 0 0 46 124.05
41 19.9921 0 0 55 160.046

From the discussion in this thread it is clear that there is room for improvement in the way RC extraction information is accessible via TCL. As improved capabilities become available in this area, I will post back to this forum with an update. Thanks to all who posted their suggestions on this topic- great discussion!

Hope this helps,
Bob