I wrote > Has anyone else noticed a significant zfs performance > deterioration when running recent opensolaris bits? > > My 32-bit / 768 MB Toshiba Tecra S1 notebook was able > to do a full opensolaris release build in ~ 4 hours 45 > minutes (gcc shadow compilation disabled; using an lzjb > compressed zpool / zfs on a single notebook hdd p-ata drive). > > After upgrading to 2007-05-25 opensolaris release > bits (compiled from source), the same release build now > needs ~ 6 hours; that's ~ 25% slower.
It might be Bug ID 6469558 "ZFS prefetch needs to be more aware of memory pressure": http://bugs.opensolaris.org/bugdatabase/view_bug.do?bug_id=6469558 Instead of compiling opensolaris for 4-6 hours, I've now used the following find / grep test using on-2007-05-30 sources: 1st test using Nevada build 60: % cd /files/onnv-2007-05-30 % repeat 10 /bin/time find usr/src/ -name "*.[hc]" -exec grep FooBar {} + usr/src/lib/pam_modules/authtok_check/authtok_check.c: * user entering FooBar1234 with PASSLENGTH=6, MINDIGIT=4, while real 4:22.5 user 3.3 sys 5.8 usr/src/lib/pam_modules/authtok_check/authtok_check.c: * user entering FooBar1234 with PASSLENGTH=6, MINDIGIT=4, while real 4:28.4 user 3.3 sys 4.8 usr/src/lib/pam_modules/authtok_check/authtok_check.c: * user entering FooBar1234 with PASSLENGTH=6, MINDIGIT=4, while real 4:18.0 user 3.3 sys 4.7 usr/src/lib/pam_modules/authtok_check/authtok_check.c: * user entering FooBar1234 with PASSLENGTH=6, MINDIGIT=4, while real 4:17.3 user 3.3 sys 4.8 usr/src/lib/pam_modules/authtok_check/authtok_check.c: * user entering FooBar1234 with PASSLENGTH=6, MINDIGIT=4, while real 4:15.0 user 3.3 sys 4.7 usr/src/lib/pam_modules/authtok_check/authtok_check.c: * user entering FooBar1234 with PASSLENGTH=6, MINDIGIT=4, while real 4:12.0 user 3.3 sys 4.7 usr/src/lib/pam_modules/authtok_check/authtok_check.c: * user entering FooBar1234 with PASSLENGTH=6, MINDIGIT=4, while real 4:21.9 user 3.3 sys 4.7 usr/src/lib/pam_modules/authtok_check/authtok_check.c: * user entering FooBar1234 with PASSLENGTH=6, MINDIGIT=4, while real 4:18.7 user 3.3 sys 4.7 usr/src/lib/pam_modules/authtok_check/authtok_check.c: * user entering FooBar1234 with PASSLENGTH=6, MINDIGIT=4, while real 4:19.5 user 3.3 sys 4.7 usr/src/lib/pam_modules/authtok_check/authtok_check.c: * user entering FooBar1234 with PASSLENGTH=6, MINDIGIT=4, while real 4:17.2 user 3.3 sys 4.7 Same test, but running onnv-2007-05-30 release bits (compiled from source). This is at least 25% slower than snv_60: (Note: zfs_prefetch_disable = 0 , the default value) % repeat 10 /bin/time find usr/src/ -name "*.[hc]" -exec grep FooBar {} + usr/src/lib/pam_modules/authtok_check/authtok_check.c: * user entering FooBar1234 with PASSLENGTH=6, MINDIGIT=4, while real 8:04.3 user 7.3 sys 13.2 usr/src/lib/pam_modules/authtok_check/authtok_check.c: * user entering FooBar1234 with PASSLENGTH=6, MINDIGIT=4, while real 6:34.4 user 7.3 sys 11.2 usr/src/lib/pam_modules/authtok_check/authtok_check.c: * user entering FooBar1234 with PASSLENGTH=6, MINDIGIT=4, while real 6:33.8 user 7.3 sys 11.1 usr/src/lib/pam_modules/authtok_check/authtok_check.c: * user entering FooBar1234 with PASSLENGTH=6, MINDIGIT=4, while real 5:35.6 user 7.3 sys 10.6 usr/src/lib/pam_modules/authtok_check/authtok_check.c: * user entering FooBar1234 with PASSLENGTH=6, MINDIGIT=4, while real 5:39.8 user 7.3 sys 10.6 usr/src/lib/pam_modules/authtok_check/authtok_check.c: * user entering FooBar1234 with PASSLENGTH=6, MINDIGIT=4, while real 5:37.8 user 7.3 sys 11.1 usr/src/lib/pam_modules/authtok_check/authtok_check.c: * user entering FooBar1234 with PASSLENGTH=6, MINDIGIT=4, while real 5:53.5 user 7.3 sys 11.0 usr/src/lib/pam_modules/authtok_check/authtok_check.c: * user entering FooBar1234 with PASSLENGTH=6, MINDIGIT=4, while real 5:45.2 user 7.3 sys 11.1 usr/src/lib/pam_modules/authtok_check/authtok_check.c: * user entering FooBar1234 with PASSLENGTH=6, MINDIGIT=4, while real 5:44.8 user 7.3 sys 11.0 usr/src/lib/pam_modules/authtok_check/authtok_check.c: * user entering FooBar1234 with PASSLENGTH=6, MINDIGIT=4, while real 5:49.1 user 7.3 sys 11.0 Then I patched zfs_prefetch_disable/W1, and now the find & grep test runs much faster on onnv-2007-05-30 bits: (Note: zfs_prefetch_disable = 1) % repeat 10 /bin/time find usr/src/ -name "*.[hc]" -exec grep FooBar {} + usr/src/lib/pam_modules/authtok_check/authtok_check.c: * user entering FooBar1234 with PASSLENGTH=6, MINDIGIT=4, while real 4:01.3 user 7.2 sys 9.9 usr/src/lib/pam_modules/authtok_check/authtok_check.c: * user entering FooBar1234 with PASSLENGTH=6, MINDIGIT=4, while real 4:24.5 user 7.2 sys 9.0 usr/src/lib/pam_modules/authtok_check/authtok_check.c: * user entering FooBar1234 with PASSLENGTH=6, MINDIGIT=4, while real 4:31.1 user 7.3 sys 9.7 usr/src/lib/pam_modules/authtok_check/authtok_check.c: * user entering FooBar1234 with PASSLENGTH=6, MINDIGIT=4, while real 4:47.0 user 7.2 sys 9.6 usr/src/lib/pam_modules/authtok_check/authtok_check.c: * user entering FooBar1234 with PASSLENGTH=6, MINDIGIT=4, while real 4:34.4 user 7.2 sys 9.5 usr/src/lib/pam_modules/authtok_check/authtok_check.c: * user entering FooBar1234 with PASSLENGTH=6, MINDIGIT=4, while real 4:38.3 user 7.3 sys 9.3 usr/src/lib/pam_modules/authtok_check/authtok_check.c: * user entering FooBar1234 with PASSLENGTH=6, MINDIGIT=4, while real 4:35.9 user 7.2 sys 9.5 usr/src/lib/pam_modules/authtok_check/authtok_check.c: * user entering FooBar1234 with PASSLENGTH=6, MINDIGIT=4, while real 4:30.2 user 7.2 sys 9.5 usr/src/lib/pam_modules/authtok_check/authtok_check.c: * user entering FooBar1234 with PASSLENGTH=6, MINDIGIT=4, while real 4:30.8 user 7.2 sys 9.3 usr/src/lib/pam_modules/authtok_check/authtok_check.c: * user entering FooBar1234 with PASSLENGTH=6, MINDIGIT=4, while real 4:33.0 user 7.2 sys 9.3 Patching zfs_prefetch_disable = 1 has helped opensolaris nightly compile times, too. With zfs_prefetch_disable/W1 nightly build time is back at 4h 45m (instead of 6h +) .... This message posted from opensolaris.org _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
