Re: [OE-core] [PATCH RFC] sstate: Switch from tgz to tar.xz for sstate

2016-01-11 Thread Richard Purdie
On Mon, 2016-01-11 at 12:00 -0800, Andre McCurdy wrote: > On Mon, Jan 11, 2016 at 11:52 AM, Khem Raj > wrote: > > > > > On Jan 11, 2016, at 11:05 AM, Andre McCurdy > > > wrote: > > > > > > On Sat, Jan 9, 2016 at 8:42 AM, Richard Purdie > > > wrote: > > > > xz compresses with a better compressi

Re: [OE-core] [PATCH RFC] sstate: Switch from tgz to tar.xz for sstate

2016-01-11 Thread Andre McCurdy
On Mon, Jan 11, 2016 at 12:12 PM, Khem Raj wrote: > >> On Jan 11, 2016, at 12:00 PM, Andre McCurdy wrote: >> >> On Mon, Jan 11, 2016 at 11:52 AM, Khem Raj wrote: >>> On Jan 11, 2016, at 11:05 AM, Andre McCurdy wrote: On Sat, Jan 9, 2016 at 8:42 AM, Richard Purdie wrote: >>>

Re: [OE-core] [PATCH RFC] sstate: Switch from tgz to tar.xz for sstate

2016-01-11 Thread Khem Raj
> On Jan 11, 2016, at 12:00 PM, Andre McCurdy wrote: > > On Mon, Jan 11, 2016 at 11:52 AM, Khem Raj wrote: >> >>> On Jan 11, 2016, at 11:05 AM, Andre McCurdy wrote: >>> >>> On Sat, Jan 9, 2016 at 8:42 AM, Richard Purdie >>> wrote: xz compresses with a better compression ratio than gz w

Re: [OE-core] [PATCH RFC] sstate: Switch from tgz to tar.xz for sstate

2016-01-11 Thread Andre McCurdy
On Mon, Jan 11, 2016 at 11:52 AM, Khem Raj wrote: > >> On Jan 11, 2016, at 11:05 AM, Andre McCurdy wrote: >> >> On Sat, Jan 9, 2016 at 8:42 AM, Richard Purdie >> wrote: >>> xz compresses with a better compression ratio than gz with similar speed >>> for compression and decompression. >> >> When

Re: [OE-core] [PATCH RFC] sstate: Switch from tgz to tar.xz for sstate

2016-01-11 Thread Khem Raj
> On Jan 11, 2016, at 11:05 AM, Andre McCurdy wrote: > > On Sat, Jan 9, 2016 at 8:42 AM, Richard Purdie > wrote: >> xz compresses with a better compression ratio than gz with similar speed >> for compression and decompression. > > When you measured compression speed to be similar, was that wit

Re: [OE-core] [PATCH RFC] sstate: Switch from tgz to tar.xz for sstate

2016-01-11 Thread Andre McCurdy
On Sat, Jan 9, 2016 at 8:42 AM, Richard Purdie wrote: > xz compresses with a better compression ratio than gz with similar speed > for compression and decompression. When you measured compression speed to be similar, was that with parallel compression? If so, with how many CPU cores? A quick tes

[OE-core] [PATCH RFC] sstate: Switch from tgz to tar.xz for sstate

2016-01-09 Thread Richard Purdie
xz compresses with a better compression ratio than gz with similar speed for compression and decompression. It therefore makes sense to switch to it for the sstate objects. As an example, the gcc-cross populate_sysroot object goes from 79,509,871 to 53,031,752 bytes which is a significant improvem