9a5bc0da50
1. Issue zil_commit only if we're actually updating something -- there's no need to commit if we're unlinking the file or if there's no atime update being applied. 2. Issue zil_commit only if the zfs has sync=always set -- for sync=standard there's no need for us to commit anything here since no application asked for an explicit sync. Speeds up untarring base.tgz on top of itself by a factor of about 2x, and speeds up rm by a factor of about 10x, on my system with an SSD SLOG over SATA. Histogram of unlink, rmdir, and rename timing shows dramatic reduction in latency for most samples. (To be fair, this was not an improvement over zfs; issuing the unnecessary zil_commit was a self-inflicted performance wound.)
NetBSD
NetBSD is a free, fast, secure, and highly portable Unix-like Open Source operating system. It is available for a wide range of platforms, from large-scale servers and powerful desktop systems to handheld and embedded devices.
Building
You can cross-build NetBSD from most UNIX-like operating systems. To build for amd64 (x86_64), in the src directory:
./build.sh -U -u -j4 -m amd64 -O ~/obj release
Additional build information available in the BUILDING file.
Binaries
Testing
On a running NetBSD system:
cd /usr/tests; atf-run | atf-report
Troubleshooting
- Send bugs and patches via web form.
- Subscribe to the mailing lists. The netbsd-users list is a good choice for many problems; watch current-users if you follow the bleeding edge of NetBSD-current.
- Join the community IRC channel #netbsd @ freenode.
Latest sources
To fetch the main CVS repository:
cvs -d anoncvs@anoncvs.NetBSD.org:/cvsroot checkout -P src
To work in the Git mirror, which is updated every few hours from CVS:
git clone https://github.com/NetBSD/src.git