Re: [PATCH] Preemption Latency Measurement Tool

Tobias Diedrich
2001-09-20T20:01:27Z

Should the patch work with SMP systems ?
Here is what I get:

Worst 20 latency times of 1322 measured in this period.
usec cause mask start line/file address end line/file
988940 reacqBKL 0 1375/sched.c c0117ba1 772/sched.c
988940 spin_lock 0 129/file_table.c c013f500 135/page_alloc.c
988940 spin_lock 0 103/page_alloc.c c0136fd9 251/timer.c
988940 spin_lock 0 129/file_table.c c013f500 135/page_alloc.c
988940 spin_lock 0 63/fork.c c0117efc 135/page_alloc.c
988940 spin_lock 0 129/file_table.c c013f500 135/page_alloc.c
988940 spin_lock 0 129/file_table.c c013f500 135/page_alloc.c
988940 spin_lock 0 592/af_unix.c c02ddd88 594/af_unix.c
988940 spin_lock 0 43/fork.c c0117ddc 829/inode.c
988940 spin_lock 0 547/sched.c c0115bf5 606/signal.c
988940 spin_lock 0 770/sched.c c011641c 80/dcache.c
988940 spin_lock 0 36/dec_and_lock.c c0319573 280/time.c
988940 spin_lock 0 36/dec_and_lock.c c0319573 280/time.c
988940 BKL 0 714/ll_rw_blk.c c01eaec1 80/dcache.c
988939 spin_lock 0 592/af_unix.c c02ddd88 594/af_unix.c
988939 spin_lock 0 714/ll_rw_blk.c c01eaec1 80/dcache.c
988939 unknown 0 76/softirq.c c011f410 782/sched.c
988939 spin_lock 0 592/af_unix.c c02ddd88 1380/sched.c
988939 spin_lock 0 176/fork.c c0118608 696/namei.c
988939 spin_lock 0 1684/af_unix.c c02e0de6 734/dcache.c

And another one about 2 seconds after the last flush:

Worst 20 latency times of 579 measured in this period.
usec cause mask start line/file address end line/file
988939 spin_lock 0 592/af_unix.c c02ddd88 133/file_table.c
988930 spin_lock 0 770/sched.c c011641c 697/sched.c
988930 spin_lock 0 547/sched.c c0115bf5 133/file_table.c
988930 spin_lock 0 1512/es1371.c c02408e0 133/file_table.c
6613 spin_lock 1 547/sched.c c0115bf5 697/sched.c
6401 spin_lock 0 547/sched.c c0115bf5 647/irq.c
2557 spin_lock 0 547/sched.c c0115bf5 647/signal.c
833 spin_lock 0 547/sched.c c0115bf5 133/file_table.c
364 BKL 6 710/tty_io.c c01d1eed 712/tty_io.c
283 BKL 4 710/tty_io.c c01d1eed 280/time.c
243 BKL 0 59/ioctl.c c014fbe5 685/socket.c
231 BKL 4 710/tty_io.c c01d1eed 697/sched.c
218 spin_lock 0 798/vmscan.c c01366a5 857/vmscan.c
210 spin_lock 0 3169/tcp_input.c c02b5331 697/sched.c
191 spin_lock 2 468/netfilter.c c0285351 119/softirq.c
183 spin_lock 0 468/netfilter.c c0285351 280/time.c
176 spin_lock 0 468/netfilter.c c0285351 697/sched.c
168 BKL 0 26/readdir.c c014ff8c 28/readdir.c
134 ide0 0 585/irq.c c0108eb1 647/irq.c
134 BKL 0 980/inode.c c01691a3 997/inode.c

--
Tobias PGP: 0x9AC7E0BC
Hannover Fantreffen ML: mailto:fantreffen-request@mantrha.de?subject=subscribe
Manga & Anime Treff Hannover: http://www.mantrha.de/