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2012-08-12 Add some basic profiling support to the evaluatorEelco Dolstra1-0/+3
Setting the environment variable NIX_COUNT_CALLS to 1 enables some basic profiling in the evaluator. It will count calls to functions and primops as well as evaluations of attributes. For example, to see where evaluation of a NixOS configuration spends its time: $ NIX_SHOW_STATS=1 NIX_COUNT_CALLS=1 ./src/nix-instantiate/nix-instantiate '<nixos>' -A system --readonly-mode ... calls to 39 primops: 239532 head 233962 tail 191252 hasAttr ... calls to 1595 functions: 224157 `/nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/pkgs/lib/lists.nix:17:19' 221767 `/nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/pkgs/lib/lists.nix:17:14' 221767 `/nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/pkgs/lib/lists.nix:17:10' ... evaluations of 7088 attributes: 167377 undefined position 132459 `/nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/pkgs/lib/attrsets.nix:119:41' 47322 `/nix/var/nix/profiles/per-user/root/channels/nixos/nixpkgs/pkgs/lib/attrsets.nix:13:21' ...
2012-08-01 Drop the block count in the garbage collectorEelco Dolstra2-15/+9
2012-08-01 DohEelco Dolstra1-1/+1
2012-08-01 Report substituter errors to clients of the Nix daemonEelco Dolstra2-1/+12
2012-07-26 Set permissions on temporary build directories to 0700Eelco Dolstra2-3/+3
Fixes #39.
2012-07-18 Use "#pragma once" to prevent repeated header file inclusionEelco Dolstra7-34/+7
2012-06-25 When using chroots, use a private PID namespaceEelco Dolstra1-2/+5
In a private PID namespace, processes have PIDs that are separate from the rest of the system. The initial child gets PID 1. Processes in the chroot cannot see processes outside of the chroot. This improves isolation between builds. However, processes on the outside can see processes in the chroot and send signals to them (if they have appropriate rights). Since the builder gets PID 1, it serves as the reaper for zombies in the chroot. This might turn out to be a problem. In that case we'll need to have a small PID 1 process that sits in a loop calling wait().
2012-03-18 Drop the externals directoryEelco Dolstra1-1/+3
Nix now requires SQLite and bzip2 to be pre-installed. SQLite is detected using pkg-config. We required DBD::SQLite anyway, so depending on SQLite is not a big problem. The --with-bzip2, --with-openssl and --with-sqlite flags are gone.
2012-03-05 Set the close-on-exec flag on file descriptorsEelco Dolstra2-0/+15
2012-02-15 On Linux, make the Nix store really read-only by using the immutable bitEelco Dolstra4-2/+91
I was bitten one time too many by Python modifying the Nix store by creating *.pyc files when run as root. On Linux, we can prevent this by setting the immutable bit on files and directories (as in ‘chattr +i’). This isn't supported by all filesystems, so it's not an error if setting the bit fails. The immutable bit is cleared by the garbage collector before deleting a path. The only tricky aspect is in optimiseStore(), since it's forbidden to create hard links to an immutable file. Thus optimiseStore() temporarily clears the immutable bit before creating the link.
2012-02-09 Use data() instead of c_str() where appropriateEelco Dolstra3-7/+7
2011-12-22 * In the garbage collector, delete invalid paths before deletingEelco Dolstra2-1/+10
unreachable paths. This matters when using --max-freed etc.: unreachable paths could become reachable again, so it's nicer to keep them if there is "real" garbage to be deleted. Also, don't use readDirectory() but read the Nix store and delete invalid paths in parallel. This reduces GC latency on very large Nix stores.
2011-12-16 * importPath() -> importPaths(). Because of buffering of the inputEelco Dolstra2-7/+13
stream it's now necessary for the daemon to process the entire sequence of exported paths, rather than letting the client do it.
2011-12-16 * Avoid expensive conversions from char arrays to STL strings.Eelco Dolstra2-3/+20
2011-12-16 * Make the import operation through the daemon much more efficientEelco Dolstra2-29/+44
(way fewer roundtrips) by allowing the client to send data in bigger chunks. * Some refactoring.
2011-12-16 * Clean up exception handling.Eelco Dolstra2-3/+10
2011-12-15 * Refactoring: move sink/source buffering into separate classes.Eelco Dolstra4-76/+116
* Buffer the HashSink. This speeds up hashing a bit because it prevents lots of calls to the hash update functions (e.g. nix-hash went from 9.3s to 8.7s of user time on the closure of my /var/run/current-system).
2011-12-15 * Buffer reads in FdSource. Together with write buffering, thisEelco Dolstra2-10/+32
significantly cuts down the number of syscalls (e.g., for "nix-store -qR /var/run/current-system" via the daemon, it reduced the number of syscalls in the client from 29134 to 4766 and in the daemon from 44266 to 20666).
2011-12-14 * Buffer writes in FdSink. This significantly reduces the number ofEelco Dolstra2-7/+37
system calls / context switches when dumping a NAR and in the worker protocol.
2011-12-02 * Move parseHash16or32 into libutil, and use in nix-hash.Eelco Dolstra2-0/+19
2011-02-09 * Sync with the trunk.Eelco Dolstra1-2/+0
2011-01-14 Remove useless <config.h> inclusion from public header.Ludovic Courtès1-2/+0
2010-12-13 * nix-instantiate: return exit status 100 to denote a permanent buildEelco Dolstra2-3/+5
failure. The build hook can use this to distinguish between transient and permanent failures on the remote side.
2010-12-13 * createDirs(path): if path already exists, make sure it's aEelco Dolstra2-20/+26
directory. * Provide a C++ wrapper around lstat().
2010-11-16 * Store the size of a store path in the database (to be precise, theEelco Dolstra2-6/+11
size of the NAR serialisation of the path, i.e., `nix-store --dump PATH'). This is useful for Hydra.
2010-11-16 * Sync with the trunk.Eelco Dolstra1-0/+2
2010-10-04 * Make sure that config.h is included before the system headers,Eelco Dolstra1-0/+2
because it defines _FILE_OFFSET_BITS. Without this, on OpenSolaris the system headers define it to be 32, and then the 32-bit stat() ends up being called with a 64-bit "struct stat", or vice versa. This also ensures that we get 64-bit file sizes everywhere. * Remove the redundant call to stat() in parseExprFromFile(). The file cannot be a symlink because that's the exit condition of the loop before.
2010-10-04 * Sync with the trunk.Eelco Dolstra1-1/+10
2010-10-04 * In printMsg(), ignore failing writes to stderr if we're in anEelco Dolstra1-1/+10
exception handler, otherwise throw an exception. We need to ignore write errors in exception handlers to ensure that cleanup code runs to completion if the other side of stderr has been closed unexpectedly.
2010-08-30 * When using the build hook, distinguish between the stderr of theEelco Dolstra1-1/+1
hook script proper, and the stdout/stderr of the builder. Only the latter should be saved in /nix/var/log/nix/drvs. * Allow the verbosity to be set through an option. * Added a flag --quiet to lower the verbosity level.
2010-08-27 * Experimental feature: allow a derivation to tell the build hook thatEelco Dolstra2-0/+16
it requires a certain feature on the build machine, e.g. requiredSystemFeatures = [ "kvm" ]; We need this in Hydra to make sure that builds that require KVM support are forwarded to machines that have KVM support. Probably this should also be enforced for local builds.
2010-08-04 * Sync with the trunk.Eelco Dolstra1-0/+1
2010-06-24 src/libutil/util.cc: include <limit.h> to ensure that PATH_MAX is definedPeter Simons1-0/+1
2010-05-12 * Sync with the trunk.Eelco Dolstra7-651/+57
2010-05-07 * Sync with the trunk.Eelco Dolstra1-0/+1
2010-05-04 * Revert r15436. This was a workaround for a bug in btrfs which seemsEelco Dolstra2-9/+0
to have been fixed now.
2010-04-20 * Sync with the trunk.Eelco Dolstra2-4/+7
2010-04-19 * Don't use the ATerm library for parsing/printing .drv files.Eelco Dolstra5-136/+56
2010-04-14 * Remove more obsolete code.Eelco Dolstra3-463/+2
2010-04-12 * Remove some obsolete functions.Eelco Dolstra2-52/+0
2010-03-31 Escape `>' signs in the XML output.Ludovic Courtès1-0/+1
* src/libutil/xml-writer.cc (nix::XMLWriter::writeAttrs): Escape `>'.
2010-03-23 (no commit message)Eelco Dolstra1-1/+1
2010-03-19 * Clean up error messages in killUser().Eelco Dolstra1-4/+6
2010-03-09 * In `nix-store --export', abort if the contents of a path hasEelco Dolstra2-1/+9
changed. This prevents corrupt paths from spreading to other machines. Note that checking the hash is cheap because we're hashing anyway (because of the --sign feature).
2010-03-04 * Synced with the trunk.Eelco Dolstra1-2/+0
2010-03-02 * When using the included sqlite/aterm libraries, build withEelco Dolstra2-2/+3
--enable-shared. * In libutil/libstore/libexpr etc., link against sqlite and aterm. * Some more header file hygiene.
2010-02-24 * Don't use fdatasync since it doesn't work on Snow Leopard.Eelco Dolstra2-7/+1
* Don't refer to config.h in util.hh, because config.h is not installed (http://hydra.nixos.org/build/303053).
2010-02-24 * Remove the fdatasync check since it's no longer needed.Eelco Dolstra2-7/+2
2010-02-10 Don't rely on `PATH_MAX' on GNU.Ludovic Courtès1-0/+10
2010-02-02 * Remove most Cygwin-specific code. Cygwin 1.7 implements advisoryEelco Dolstra1-12/+0
POSIX locks, and simulates Unix-style file deletion semantics sufficiently. Note that this means that Nix won't work on Cygwin 1.5 anymore.
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