Re: [gentoo-user] Core 2 duo: Building threaded program versions
On 10 January 2007 09:46, Nelson, David (ED, PARD) wrote: Regarding pbzip2, by the way, I gave it a shot last night. Definately faster for the type of archive I was compressing (mp3s in a tar archive). If I remember rightly it was approx 1min30s vs 0min50s. Not quite twice as fast, but a definate improvement. I plan to do a bit of further testing/playing if anyone is interested in the results. ... and was the resulting tarball smaller than an uncompressed one? Uwe -- A fast and easy generator of fractals for KDE: http://www.SysEx.com.na/iwy-1.0.tar.bz2 Proof of concept of a TSP solver for KDE: http://www.SysEx.com.na/epat-0.1.tar.bz2 -- gentoo-user@gentoo.org mailing list
RE: [gentoo-user] Core 2 duo: Building threaded program versions
-Original Message- From: Uwe Thiem [mailto:[EMAIL PROTECTED] Sent: 10 January 2007 08:40 To: gentoo-user@lists.gentoo.org Subject: Re: [gentoo-user] Core 2 duo: Building threaded program versions On 10 January 2007 09:46, Nelson, David (ED, PARD) wrote: Regarding pbzip2, by the way, I gave it a shot last night. Definately faster for the type of archive I was compressing (mp3s in a tar archive). If I remember rightly it was approx 1min30s vs 0min50s. Not quite twice as fast, but a definate improvement. I plan to do a bit of further testing/playing if anyone is interested in the results. ... and was the resulting tarball smaller than an uncompressed one? Uwe By about 1% agreed MP3s are a poor example but it was late last night and I didn't have time to mess around with it much. Going to try with a mix of documents (word processed documents, text, pictures, some video) to see how it performs then. David Disclaimer: I represent no-one else in my emails to this list. Use any advice given at your own risk. -- gentoo-user@gentoo.org mailing list
Re: [gentoo-user] Core 2 duo: Building threaded program versions
On Wednesday 10 January 2007 12:20, Nelson, David (ED, PARD) wrote: By about 1% agreed MP3s are a poor example but it was late last night and I didn't have time to mess around with it much. Going to try with a mix of documents (word processed documents, text, pictures, some video) to see how it performs then. The site says that pbzip2 is compatible with bzip2, so it may be faster but I think it does not compress more than its single-threaded cousin. -- gentoo-user@gentoo.org mailing list
RE: [gentoo-user] Core 2 duo: Building threaded program versions
-Original Message- From: Etaoin Shrdlu [mailto:[EMAIL PROTECTED] Sent: 10 January 2007 12:15 To: gentoo-user@lists.gentoo.org Subject: Re: [gentoo-user] Core 2 duo: Building threaded program versions By about 1% agreed MP3s are a poor example but it was late last night and I didn't have time to mess around with it much. Going to try with a mix of documents (word processed documents, text, pictures, some video) to see how it performs then. The site says that pbzip2 is compatible with bzip2, so it may be faster but I think it does not compress more than its single-threaded cousin. I was answering in reply to: ... and was the resulting tarball smaller than an uncompressed one? i.e. was mp3.tar.bz2 smaller than mp3.tar. Which it was, but only slightly as MP3s are already compressed as they are so don't compress so well. David Note: These views are my own, advice is provided with no guarantee of success. I do not represent anyone else in any emails I send to this list. -- gentoo-user@gentoo.org mailing list
Re: [gentoo-user] Core 2 duo: Building threaded program versions
On 10 January 2007 13:20, Nelson, David (ED, PARD) wrote: -Original Message- From: Uwe Thiem [mailto:[EMAIL PROTECTED] Sent: 10 January 2007 08:40 To: gentoo-user@lists.gentoo.org Subject: Re: [gentoo-user] Core 2 duo: Building threaded program versions On 10 January 2007 09:46, Nelson, David (ED, PARD) wrote: Regarding pbzip2, by the way, I gave it a shot last night. Definately faster for the type of archive I was compressing (mp3s in a tar archive). If I remember rightly it was approx 1min30s vs 0min50s. Not quite twice as fast, but a definate improvement. I plan to do a bit of further testing/playing if anyone is interested in the results. ... and was the resulting tarball smaller than an uncompressed one? Uwe By about 1% agreed MP3s are a poor example but it was late last night and I didn't have time to mess around with it much. Going to try with a mix of documents (word processed documents, text, pictures, some video) to see how it performs then. I was trying to make a point that is was rather pointless to check a compressor on files that were basically incompressible. ;-) Uwe -- A fast and easy generator of fractals for KDE: http://www.SysEx.com.na/iwy-1.0.tar.bz2 Proof of concept of a TSP solver for KDE: http://www.SysEx.com.na/epat-0.1.tar.bz2 -- gentoo-user@gentoo.org mailing list
Re: [gentoo-user] Core 2 duo: Building threaded program versions
On 1/8/07, Nico Schümann [EMAIL PROTECTED] wrote: thread-using way? It's not that nice to see the machine in idle at all^^ Maybe there's any hidden use flag I haven't heard of or so :) Just turn on disk encryption with dm-crypt. That will take care of the extra core is idle problem! ;- -Richard -- gentoo-user@gentoo.org mailing list
Re: [gentoo-user] Core 2 duo: Building threaded program versions
On 1/9/07, Richard Fish [EMAIL PROTECTED] wrote: On 1/8/07, Nico Schümann [EMAIL PROTECTED] wrote: thread-using way? It's not that nice to see the machine in idle at all^^ Maybe there's any hidden use flag I haven't heard of or so :) Just turn on disk encryption with dm-crypt. That will take care of the extra core is idle problem! ;- -Richard -- gentoo-user@gentoo.org mailing list and theres the rare chance you could be decompressing faster than you have hard drive access, but that might be a bit far fetched. I shouldn't post so early in the AM. -- /ent Fredric (aka theJackal) -- gentoo-user@gentoo.org mailing list
RE: [gentoo-user] Core 2 duo: Building threaded program versions
-Original Message- From: Kent Fredric [mailto:[EMAIL PROTECTED] Sent: 09 January 2007 18:48 To: gentoo-user@lists.gentoo.org Subject: Re: [gentoo-user] Core 2 duo: Building threaded program versions On 1/9/07, Richard Fish [EMAIL PROTECTED] wrote: On 1/8/07, Nico Schümann [EMAIL PROTECTED] wrote: thread-using way? It's not that nice to see the machine in idle at all^^ Maybe there's any hidden use flag I haven't heard of or so :) Just turn on disk encryption with dm-crypt. That will take care of the extra core is idle problem! ;- -Richard -- gentoo-user@gentoo.org mailing list and theres the rare chance you could be decompressing faster than you have hard drive access, but that might be a bit far fetched. I shouldn't post so early in the AM. -- /ent Fredric (aka theJackal) Regarding pbzip2, by the way, I gave it a shot last night. Definately faster for the type of archive I was compressing (mp3s in a tar archive). If I remember rightly it was approx 1min30s vs 0min50s. Not quite twice as fast, but a definate improvement. I plan to do a bit of further testing/playing if anyone is interested in the results. David Note: These views are my own, advice is provided with no guarantee of success. I do not represent anyone else in any emails I send to this list. -- gentoo-user@gentoo.org mailing list
Re: [gentoo-user] Core 2 duo: Building threaded program versions
On Monday 8 January 2007 21:16, Nico Schümann wrote: Hi folks, I recently set up a Core 2 duo system. Following the AMD64 howto, the system now works. Kernel compilation took 1:40 minutes passing -j6 to make. Then I tried to bunzip a large file and found out that the machine was about 40 % in idle which is clear because bzip2 is only one process. So is there any way to build those utilities like bzip2 or gzip in a thread-using way? Use pbzip2, a parallel version of bzip2. It's in portage. -- gentoo-user@gentoo.org mailing list
Re: [gentoo-user] Core 2 duo: Building threaded program versions
On Monday 08 January 2007 14:16, Nico Schümann [EMAIL PROTECTED] wrote about '[gentoo-user] Core 2 duo: Building threaded program versions': Then I tried to bunzip a large file and found out that the machine was about 40 % in idle which is clear because bzip2 is only one process. So is there any way to build those utilities like bzip2 or gzip in a thread-using way? In general, no. If there was a magic way to turn non-parallel activities into parallel activities it would be done by the kernel and/or gcc automagically AND we would have seen desktops be multi-core years ago. It's not that nice to see the machine in idle at all^^ Multi-task. I'm doing very little right now and I have 207 processes running. The great thing about my 4 cores is I be doing all kinds of crazy stuff in the background and my games/full-screen video never miss a beat. -- If there's one thing we've established over the years, it's that the vast majority of our users don't have the slightest clue what's best for them in terms of package stability. -- Gentoo Developer Ciaran McCreesh pgp8qdoR26T19.pgp Description: PGP signature
