From mboxrd@z Thu Jan 1 00:00:00 1970 From: dany4madden@gmail.com (Dany Madden) Date: Mon, 14 Jun 2010 10:16:46 -0700 Subject: [ltt-dev] ltt trace doesn't show event mm.page_alloc Message-ID: Hi, Ltt trace doesn't show mm.page_alloc event with the mainline kernel: - mainline kernel 2.6.32.12 - patch-2.6.32.9-lttng-0.198 - ltt-control-0.79-01022010 - lttv-0.12.30-02102010 mm-trace.ko is loaded. ltt-armall output shows .... Connecting /sys/kernel/debug/ltt/markers/mm/wait_on_page_start Connecting /sys/kernel/debug/ltt/markers/mm/wait_on_page_end Connecting /sys/kernel/debug/ltt/markers/mm/huge_page_free Connecting /sys/kernel/debug/ltt/markers/mm/huge_page_alloc Connecting /sys/kernel/debug/ltt/markers/mm/page_free Connecting /sys/kernel/debug/ltt/markers/mm/page_alloc Connecting /sys/kernel/debug/ltt/markers/mm/swap_in Connecting /sys/kernel/debug/ltt/markers/mm/swap_out Connecting /sys/kernel/debug/ltt/markers/mm/swap_file_close Connecting /sys/kernel/debug/ltt/markers/mm/swap_file_open Connecting /sys/kernel/debug/ltt/markers/mm/add_to_page_cache Connecting /sys/kernel/debug/ltt/markers/mm/remove_from_page_cache ... These are the steps to recreate the problem: % lttctl -C -w /tmp/trace4 trace4 % # ** run a program that does a lot of malloc and free % lttctl -D trace4 # even mm.page_alloc is **not** showing in the trace % lttv -m textDump --fatal -e event.name=mm.page_alloc -t /tmp/trace4 Trace set contains 1 traces End trace set # even mm.page_free is showing in the trace. % lttv -m textDump --process_stats -e event.name=mm.page_free -t /tmp/trace4 Trace set contains 1 traces ... mm.page_free: 7334.057610863 (/tmp/trace4/mm_1), 6200, 6200, ./ltt_alloc, , 4962, 0x0, SYSCALL { pfn = 487653, order = 0 } mm.page_free: 7334.057612915 (/tmp/trace4/mm_1), 6200, 6200, ./ltt_alloc, , 4962, 0x0, SYSCALL { pfn = 510031, order = 0 } mm.page_free: 7334.057613190 (/tmp/trace4/mm_1), 6200, 6200, ./ltt_alloc, , 4962, 0x0, SYSCALL { pfn = 510030, order = 0 } ... Please help look at this problem. Thanks! Dany -------------- next part -------------- An HTML attachment was scrubbed... URL: