Re: My review comment over TU190 & HI112

[moonshade (翻滾吧！貓咪)]

※ 引述《tellux (寒川凝步)》之銘言：
: //TU190
: In this paper, the author presents a detailed placement algorithm that
: can handle both row-based standard cell placement and placement in
: presence of fixed macros. This detailed placer works on legalized
: placement to further improve the solution quality. It consists of a
: Global Swap technique to swap cells based on their optimal region, a
                                               ^^^^^^^^^^^^^^^^^^^^
                              regions?, each cell has it's own optimal region
: Vertical Swap technique to fix the local errors vertically, a fast
: Local Re-ordering technique to fix the local order horizontally, and
: a Single-Segment Clustering technique that can place the cells in a
: segment optimally when cells not in this segment are fixed. Experiments
                    ^^^^, and the  ("not in this segment" is specified)
: on two sets of benchmarks show that this detailed placer can achieve
: better wirelength and runtime compared to Fengshui 5.0, rowIroning
: and Domino.
: 1. The author claims four main contributions in this paper: Global
: Swap, Vertical Swap, Local Re-ordering, and Single-Segment Clustering.
: However, three of these ideas (Global Swap, Local Re-ordering, and
: Single-Segment Clustering) are very similar to those in the detailed
: placement of "FastPlace: An Analytical Placer for Mixed-Mode Designs"
: published in ISPD05. This paper just contributes more implementation
: details about these ideas and provides a faster algorithm for
: Fixed-Order Single Segment Placement Problem.
: 2. The experimental results in this paper may not be an appropriate
: comparison. The author used the Placement Utilities in Capo9.1 to
: legalize MPL5's global placement result. The placement result was
: too much disturbed by the legalizer and shouldn't be used to compare
        shouldn't be compared to
                              ^^
:  the performance of detailed placer. The legalized wirelength by
: MPL5's own legalizer is 1.70e+06, which is even better then the
: wirelength (1.78e+06) result generated by the detailed place stated
:  in this paper. The claim in the abstract (a legalized state-of-the-art
:  global placement solution may still have a lot of room for
: improvement in wirelength) is not appropriate.
  ^^^^^^^^^^^ N-count
: 3. The paper claims that Global Swap gives the result most profit,
                                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
        "the most" ，這句話有點奇怪，給了result 最多的profit?

        感覺不是很英文

: but there isn't any experimental result in this. The readers cannot
: distinguish the individual contributions of the algorithms proposed
: in this paper.
: //HI112
: A three-step mixed-size detailed placement is described in this paper.
:  A combination of constraint graph and linear programming is used to
:  remove the overlap between macros. Standard cells are legalized by
: an enhanced greedy method. In the end, a slidingwindow-based cell
: swapping is applied to further reduce wirelength. The experimental
: results show that it can produce legal placement for all the circuits
:  in ICCAD04-MS, while Fengshui fails for 1/3 of them, and the
: wirelength produced using its algorithm is shorter by 3% on average.
: 1. The paper proposes a macro legalization method with a combination
:  of constraint graph and linear programming. However, the experimental
:  results show very little wirelength improvement compared with a
: simple greedy legalizer. The author claimed the method one of the
: two main contributions, which does not seem an efficient way to macro
: legalization.
: 2. The paper claims that it can produce legal placement for all the
: circuits in ICCAD04-MS, while Fengshui fails for 1/3 of them. This
                                               ^^^不用 prep吧?
        Obi-wan 對Annakin 說 "I failed you"
: is not a fair comparison while the global placement results are
: generated by an unknown analytical placer. Why not just use Fengshui's
:  global placement result for comparison? The experimental results will
: be much more convincing if the proposed method could generate better
: result on Fengshui's global placement compared with Fengshui's own

        a better result/results

:  detailed placer.

--

        拒絕人最好的方法就是慢慢讓他失去希望，或是讓他忘了他一開始

        到底想要什麼...

--
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◆ From: 203.203.83.87
→ bluetai:Obi-wan 對Annakin 說 "I failed you"
→ bluetai:看不懂這一句~ XD
→ moonshade:應該是I failed to teach you, to make you
→ moonshade:the chosen one
推 bluetai:哦~我誤會了~ 我第一次看成 Annika~ XD
推 moonshade:................................
推 Donnie:每個cell 的optimal region可能不只一個
→ moonshade:也是~