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authorEelco Dolstra <eelco.dolstra@logicblox.com>2013-08-07T11·51+0000
committerEelco Dolstra <eelco.dolstra@logicblox.com>2013-08-07T12·02+0200
commita583a2bc59a4ee2b067e5520f6c5bc0c61852c32 (patch)
tree137be66f58b664dbf0aa21138000d711d5e00162 /src/libutil/Makefile.am
parent263d6682224f516aed74286453c5e2e097a38aa6 (diff)
Run the daemon worker on the same CPU as the client
On a system with multiple CPUs, running Nix operations through the
daemon is significantly slower than "direct" mode:

$ NIX_REMOTE= nix-instantiate '<nixos>' -A system
real    0m0.974s
user    0m0.875s
sys     0m0.088s

$ NIX_REMOTE=daemon nix-instantiate '<nixos>' -A system
real    0m2.118s
user    0m1.463s
sys     0m0.218s

The main reason seems to be that the client and the worker get moved
to a different CPU after every call to the worker.  This patch adds a
hack to lock them to the same CPU.  With this, the overhead of going
through the daemon is very small:

$ NIX_REMOTE=daemon nix-instantiate '<nixos>' -A system
real    0m1.074s
user    0m0.809s
sys     0m0.098s
Diffstat (limited to 'src/libutil/Makefile.am')
-rw-r--r--src/libutil/Makefile.am4
1 files changed, 2 insertions, 2 deletions
diff --git a/src/libutil/Makefile.am b/src/libutil/Makefile.am
index fe896eec5012..0c4073e66eab 100644
--- a/src/libutil/Makefile.am
+++ b/src/libutil/Makefile.am
@@ -1,12 +1,12 @@
 pkglib_LTLIBRARIES = libutil.la
 
 libutil_la_SOURCES = util.cc hash.cc serialise.cc \
-  archive.cc xml-writer.cc
+  archive.cc xml-writer.cc affinity.cc
 
 libutil_la_LIBADD = ../boost/format/libformat.la
 
 pkginclude_HEADERS = util.hh hash.hh serialise.hh \
-  archive.hh xml-writer.hh types.hh
+  archive.hh xml-writer.hh types.hh affinity.hh
 
 if !HAVE_OPENSSL
 libutil_la_SOURCES += \