misc additions

4 files changed, 31 insertions, 3 deletions

diff --git a/books/wanted-books.page b/books/wanted-books.page
index 60ef1d8..3c6864c 100644
--- a/books/wanted-books.page
+++ b/books/wanted-books.page
@@ -21,9 +21,7 @@ Technical
  * **Mathematical Foundations of Quantum Mechanics** by John von Neumann
  * **Real and Complex Analysis** by Walter Rudin
  * **Art of Computer Programming** by Donald E. Knuth
- * **Gravitation** by MTW
  * **Euclid's Elements**
- * **C Programming Language** by Brian W. Kernighan
  * **Mathematical Physics** by Robert Geroch
  * **The Scientist and Engineer's Guide to Digital Signal Processing** by Steven Smith
 
@@ -31,7 +29,6 @@ Math
 ~~~~~~~~~~~~~~
 (I haven't really looked in to most of these, just sound interesting)
 
-
  * **On formally undecidable propositions of Principa Mathematica and related systems**, by Kurt Godel. 
  * **Computability and Unsolvability**, by Martin Davis. 
  * **Mathematical Foundations of Information Theory**, by A.I. Khinchin. 
@@ -56,6 +53,8 @@ Novels
  * **The Moon is a Harsh Mistress** by Heinlen
  * **Babel-17** (http://en.wikipedia.org/wiki/Babel-17)
     SciFi, a language is invented to be used as a weapon
+ * **The Mote in God's Eye** by Niven and Pournelle
+ * **The Windup Girl** by Paolo Bacigalupi
 
 Non-Fiction
 -----------
@@ -68,6 +67,7 @@ Other
  * **The Influence of Sea Power Upon History, 1660-1783** by A.T. Mahan
  * **A Perfect Vacuum** by Stanislaw Lem (fictional book reviews)
  * **Imaginary Magnitude** by Stanislaw Lem (fictional book introductions)
+ * **Doktor Sleepless** by Warren Ellis
 
 List of Lists
 ---------------
diff --git a/software/debian.page b/software/debian.page
index 16d456d..ba49a33 100644
--- a/software/debian.page
+++ b/software/debian.page
@@ -50,6 +50,8 @@ Some gotchas from installing debian a few times:
  * To install emacs without an X environment, use ``emacs23-nox`` (or a more
    recent version).
 
+ * To change time zone: ``sudo dpkg-reconfigure tzdata``
+
 Debian Package Tools
 ------------------------------
 ``dkpg -S somefile`` shows what packages a given file were installed by. ``dpkg
diff --git a/software/misc.page b/software/misc.page
index 8152c92..ecedf85 100644
--- a/software/misc.page
+++ b/software/misc.page
@@ -123,3 +123,28 @@ are invisible within Inkscape but visible when exported.
 To remove this box, edit the raw XML using the XML Editor in Inkscape
 (Shift-Ctrl-X), look for an svg:flowRoot element within the first layer, and
 delete it.
+
+Latency Numbers
+-----------------
+
+From https://gist.github.com/2841832::
+
+    L1 cache reference                            0.5 ns
+    Branch mispredict                             5   ns
+    L2 cache reference                            7   ns             14x L1 cache
+    Mutex lock/unlock                            25   ns
+    Main memory reference                       100   ns             20x L2 cache, 200x L1 cache
+    Compress 1K bytes with Zippy              3,000   ns
+    Send 1K bytes over 1 Gbps network        10,000   ns    0.01 ms
+    Read 4K randomly from SSD*              150,000   ns    0.15 ms
+    Read 1 MB sequentially from memory      250,000   ns    0.25 ms
+    Round trip within same datacenter       500,000   ns    0.5  ms
+    Read 1 MB sequentially from SSD*      1,000,000   ns    1    ms  4X memory
+    Disk seek                            10,000,000   ns   10    ms  20x datacenter roundtrip
+    Read 1 MB sequentially from disk     20,000,000   ns   20    ms  80x memory, 20X SSD
+    Send packet CA->Netherlands->CA     150,000,000   ns  150    ms
+
+    Notes:
+    1 ns = 10-9 seconds
+    1 ms = 10-3 seconds
+    * Assuming ~1GB/sec SSD
diff --git a/software/packages.page b/software/packages.page
index 99aeeb1..639c056 100644
--- a/software/packages.page
+++ b/software/packages.page
@@ -31,6 +31,7 @@ Almost all machines get the following (decreasing minimalism):
     netcat
     ngrep
     tcpdump
+    mtr
 
 If debian-based, add ``build-essential``, ``openssh-server``, ``manpages-dev``,
 and it's ``git-core`` (not ``git``). See also [debian].