I got hold of iosnoop and invoked it with -v right after I started the song and invoked untar of mozilla. There was a time I noted when ogg123 hung for nearly 5 seconds by simply using date commands. I took that timestamp and grepped in iosnoop log. Here is a snippet of iosnoop output around that time:
2005 Jul 14 13:07:23 0 101324 W 13675 49664 tar <none> 2005 Jul 14 13:07:23 1000 101247 R 6307832 4096 ogg123 /mnt/fat32/AankhonMeinBaseHoTum.mp3.ogg 2005 Jul 14 13:07:23 0 3 W 11306544 3072 fsflush /var/tmp/portage/mozilla-firefox-1.0.4/work/mozilla/intl/uconv/native/nsNativeUConvService.h dtrace: 285 dynamic variable drops with non-empty dirty list 2005 Jul 14 13:07:23 0 3 W 11303628 2048 fsflush /var/tmp/portage/mozilla-firefox-1.0.4/work/mozilla/intl/locale/src/mac/nsCollationMac.h ... ... 343 similar lines later 2005 Jul 14 13:07:24 0 3 10990224 1024 fsflush /var/tmp/portage/mozilla-firefox-1.0.4/work/mozilla/extensions/xmlextras/build/CVS/Root 2005 Jul 14 13:07:24 0 0 10761952 1024 /var/tmp/portage/mozilla-firefox-1.0.4/work/mozilla/extensions/typeaheadfind/src/CVS/Repository ... ... 720 similar lines later 2005 Jul 14 13:07:26 0 0 11100154 1024 /var/tmp/portage/mozilla-firefox-1.0.4/work/mozilla/embedding/browser/cocoa/CVS/Tag 2005 Jul 14 13:07:26 0 3 W 11088698 1024 fsflush /var/tmp/portage/mozilla-firefox-1.0.4/work/mozilla/config/Moz/CVS/Tag ... ... 125 similar lines later 2005 Jul 14 13:07:26 0 3 W 11311712 6144 fsflush /var/tmp/portage/mozilla-firefox-1.0.4/work/mozilla/intl/uconv/ucvlatin/iso-ir-111.ut 2005 Jul 14 13:07:26 0 3 11200962 5120 /var/tmp/portage/mozilla-firefox-1.0.4/work/mozilla/embedding/components/ui/helperAppDlg/nsHelperAppDlg.xul 2005 Jul 14 13:07:27 0 0 11099744 1024 /var/tmp/portage/mozilla-firefox-1.0.4/work/mozilla/embedding/browser/activex/tests/vbrowse/CVS/Tag ... 100 similar lines later ... 2005 Jul 14 13:07:27 0 0 10742430 1024 /var/tmp/portage/mozilla-firefox-1.0.4/work/mozilla/extensions/universalchardet/Makefile.in 2005 Jul 14 13:07:27 0 3 W 11087900 2048 fsflush /var/tmp/portage/mozilla-firefox-1.0.4/work/mozilla/db/mork/src/morkBead.h ... 30 similar lines later 2005 Jul 14 13:07:27 0 3 W 11201376 1024 fsflush /var/tmp/portage/mozilla-firefox-1.0.4/work/mozilla/embedding/components/profilesharingsetup/CVS/Tag 2005 Jul 14 13:07:27 0 0 10766432 1024 /var/tmp/portage/mozilla-firefox-1.0.4/work/mozilla/extensions/wallet/resources/locale/en-US/walletNavigatorOverlay.dtd ... 300 lines later 2005 Jul 14 13:07:28 0 0 11093180 1024 /var/tmp/portage/mozilla-firefox-1.0.4/work/mozilla/db/mdb/Makefile.in 2005 Jul 14 13:07:28 0 101324 W 13772 11776 tar <none> 2005 Jul 14 13:07:28 0 101326 W 12935600 57344 dtrace /var/tmp/ios.log 2005 Jul 14 13:07:28 0 101326 W 12935712 57344 dtrace /var/tmp/ios.log 2005 Jul 14 13:07:28 0 3 W 11101796 5120 fsflush /var/tmp/portage/mozilla-firefox-1.0.4/work/mozilla/embedding/browser/powerplant/ReadMe.txt ... 9 lines later 2005 Jul 14 13:07:28 0 3 11097904 7168 fsflush /var/tmp/portage/mozilla-firefox-1.0.4/work/mozilla/embedding/browser/activex/src/pluginhostctrl/pluginsdk_include/jritypes.h ... 300 lines later 2005 Jul 14 13:07:28 0 0 11910194 6144 /var/tmp/portage/mozilla-firefox-1.0.4/work/mozilla/content/xml/tests/books/charing.gif 2005 Jul 14 13:07:28 0 0 11963344 8192 <none> 2005 Jul 14 13:07:28 0 101326 W 12935824 57344 dtrace /var/tmp/ios.log 2005 Jul 14 13:07:28 1000 101247 R 6307840 4096 ogg123 /mnt/fat32/AankhonMeinBaseHoTum.mp3.ogg ----------------- 2005 Jul 14 13:07:35 0 101323 R 41741493 4096 bzip2 /mnt/linux-fat32/distfiles/firefox-1.0.4-source.tar.bz2 the thing to note with mozilla tar.bz2 is that bzip2 uses 4k size blocks and the tar itself consists of large number of very small sized files. That could explain why there are so many outstanding requests. This looks like a limitation from using fat32 format (which probably defaults to 4k block size) for source. Also note that my song is in one fat32 partition and mozilla tar is on another fat32. The destination of untar is on "/" which is logging. Is the pcfs driver the culprit here? I have doubt about that because bzip2 never figured in the above mentioned 5 seconds in iosnoop. Moreover, the symptoms of skips/freezes also show up when firefox loads and tries to open around 12 tabs; this operation is all "/" bound. Is it just that UFS is not suited for large number of small files or fat32/pcfs is the culprit? I haven't looked into tuning fsflush as yet and I am not sure if that is even required. I will appreciate some help. This message posted from opensolaris.org _______________________________________________ opensolaris-discuss mailing list opensolaris-discuss@opensolaris.org
