ext3 allocate-with-reservation latencies
From: Lee Revell
Date: Mon Apr 04 2005 - 22:55:12 EST
I can trigger latencies up to ~1.1 ms with a CVS checkout. It looks
like inside ext3_try_to_allocate_with_rsv, we spend a long time in this
loop:
ext3_test_allocatable (bitmap_search_next_usable_block)
find_next_zero_bit (bitmap_search_next_usable_block)
find_next_zero_bit (bitmap_search_next_usable_block)
ext3_test_allocatable (bitmap_search_next_usable_block)
find_next_zero_bit (bitmap_search_next_usable_block)
find_next_zero_bit (bitmap_search_next_usable_block)
etc.
Lee
Attachment:
ext3_reservation.bz2
Description: application/bzip