2008/9/16 Joe Landman <[EMAIL PROTECTED]> > Jeff Layton wrote: > >> >> I've never used Mercurial or any other "real" programming tool for >> tracking changes, but go for it! It forces me to learn it. >> > > Common ones these days are Mercurial and git. I prefer the former, it is > understandable by mere mortals. > > I like the idea of a DB, but I'm a bit worried that this will get out of >> hand. It's a simple tool to do a quick analysis (although I have bigger >> plans in mind). I haven't looked at SQLite in a few years. Is it still an >> in-memory DB or does it allow you to dump the DB to a file (or two). >> > > On disk very simple database. Nothing even remotely complex about it. > Slowly (and surely) many projects that have been using bdb (or more > correctly *db) are migrating to it. We have been using it for a while for > lots of little things. Works quite well, painless to set up (you don't). > > >> BTW - thanks for the patch. I like the second option of ignoring any >> return codes that are negative. Easy change. >> > > should read > > ... if ($junk < 0); >
I applyed that but got the error: Argument "" isn't numeric in numeric lt (<) at ./strace_analyzer.pl line 310, <> line 64377. So I modifiy the line:310 as following: $ReadBytesTotal += $junk if ($junk ne "" && $junk < 0); It works but there is a question: Is it normal that $junk 's value is ""? > > > >> Thanks! >> >> Jeff >> >> >> ----- Original Message ---- >> From: Joe Landman <[EMAIL PROTECTED]> >> To: Jeff Layton <[EMAIL PROTECTED]> >> Cc: Mark Hahn <[EMAIL PROTECTED]>; Eric.L <[EMAIL PROTECTED]>; >> beowulf@beowulf.org >> Sent: Tuesday, September 16, 2008 8:13:10 AM >> Subject: Re: [Beowulf] stace_analyzer.pl can't work. >> >> A quick patchy-patchy for 310 >> >> >> >> --- strace_analyzer.pl <http://strace_analyzer.pl> 2008-09-16 >> 07:57:34.000000000 -0400 >> +++ strace_analyzer_new.pl <http://strace_analyzer_new.pl> 2008-09-16 >> 08:01:45.000000000 -0400 >> >> @@ -307,7 +307,7 @@ >> $junk =~ s/[^0-9]//g; >> >> # Keep track of total number bytes read >> - $ReadBytesTotal += $junk; >> + $ReadBytesTotal += $junk if ($junk != -1); >> >> # Clean up write unit >> ($junk1, $junk2)=split(/\,/,$cmd_unit); >> >> >> There may be other error return codes which are negative, so if you want >> to filter those as well, use "(if $junk < 0)" rather than the above. >> >> As for the rest of the code structure, writing this parser isn't all >> that hard, and for those with smaller memories but bigger disks (and a >> desired to analyze large straces), we could use the DBIx::SimplePerl >> module. Jeff is already putting his arrays together as hashes, and that >> module makes it real easy to dump a hash data structure directly into a >> database, say a SQLite3 database. Which, curiously, could make a bit of >> the code easier to deal with/write/debug. >> >> The issue you have to worry about in dealing with huge streams of data, >> is running out of ram. This happens. Many "common" techniques fail >> when data gets very large (compared to something like ram). We had to >> solve a large upload/download problem for a customer who decided to use >> a web server for multi gigabyte file upload/download form in an >> application. The common solution was to pull everything in to ram and >> massage it from there. This failed rather quickly. >> >> I don't personally have large amounts of "free" time, but I could likely >> help out a bit with this. Jeff, do you want me to create something on >> our mercurial server for this? Or do you have it in SVN/CVS somewhere? >> >> Joe >> >> >> -- >> Joseph Landman, Ph.D >> Founder and CEO >> Scalable Informatics LLC, >> email: [EMAIL PROTECTED] <mailto: >> [EMAIL PROTECTED]> >> web : http://www.scalableinformatics.com >> http://jackrabbit.scalableinformatics.com >> phone: +1 734 786 8423 x121 >> fax : +1 866 888 3112 >> cell : +1 734 612 4615 >> > > > -- > Joseph Landman, Ph.D > Founder and CEO > Scalable Informatics LLC, > email: [EMAIL PROTECTED] > web : http://www.scalableinformatics.com > http://jackrabbit.scalableinformatics.com > phone: +1 734 786 8423 x121 > fax : +1 866 888 3112 > cell : +1 734 612 4615 >
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