Start keeping notes on tarball unpack, checksum, kernel compile, etc.

diff --git a/results/kcompile.txt b/results/kcompile.txt
new file mode 100644 (file)
index 0000000..8b2afdc
--- /dev/null
+++ b/results/kcompile.txt
@@ -0,0 +1,42 @@
+Linux kernel compilation benchmark, measured as wall-clock time.
+
+Tests:
+ [1] time tar -jxf /scratch/linux-2.6.37.tar.bz2
+ [2] time find linux-2.6.37 -type f -print0 | sort -z | xargs -0 sha1sum >/dev/null  # checksum 35187 files, 392.9 MiB total
+
+==============================================================================
+NFS in EC2
+2011-03-08
+
+ [1] 65m39.250s
+ [2] 26m26.267s
+
+==============================================================================
+Native NFS on c09-45
+2011-03-08
+
+ [1] 10m18.149s
+     11m2.714s          (re-run)
+ [2] 0m25.813s
+
+==============================================================================
+Local disk on c09-45
+2011-03-08
+
+ [1] 30.465s            (including final sync; decompression: 0m15.865s)
+ [2] 0m2.453s
+
+==============================================================================
+Local disk on c09-45, mount with -o sync
+2011-03-08
+
+ [1] 3m5.226s
+
+==============================================================================
+BlueSky, US-West, range requests
+2011-03-08
+
+ [1] 5m12.465s
+ [2] 0m31.590s          (remount, then immediately run)
+ [2] 25m48.819s         (data cache flushed, inodes still cached in memory)
+ [2]                    (proxy entirely restarted: no data cached)