gocryptfs - Mirror of gocryptfs source code on Github

Age	Commit message (Collapse)	Author
2017-08-16	cryptocore: add urandom + randprefetch benchmarks	Jakob Unterwurzacher
	The benchmark that supported the decision for 512-byte prefetching previously lived outside the repo. Let's add it where it belongs so it cannot get lost.
2017-06-11	cryptocore: prefetch nonces in the background	Jakob Unterwurzacher
	Spawn a worker goroutine that reads the next 512-byte block while the current one is being drained. This should help reduce waiting times when /dev/urandom is very slow (like on Linux 3.16 kernels).
2017-06-09	cryptocore: prefetch nonces in 512-byte blocks	Jakob Unterwurzacher
	On my machine, reading 512-byte blocks from /dev/urandom (same via getentropy syscall) is a lot faster in terms of throughput: Blocksize Throughput 16 28.18 MB/s 512 83.75 MB/s For a single-threaded streaming write, this drops the CPU usage of nonceGenerator.Get to almost 1/3: flat flat% sum% cum cum% Before 0 0% 95.08% 0.35s 2.92% github.com/rfjakob/gocryptfs/internal/cryptocore.(nonceGenerator).Get After 0.01s 0.092% 92.34% 0.13s 1.20% github.com/rfjakob/gocryptfs/internal/cryptocore.(nonceGenerator).Get This change makes the nonce reading single-threaded, which may hurt massively-parallel writes.