[ltt-dev] issues with lttv 0.12.7
Dany Madden
dany.r.madden at gmail.com
Wed Jul 1 16:22:22 EDT 2009
Hi Mathieu,
As you suggested, I've tested <lttv --memory -m textDump -t /tmp/trace1>
command with glib 2.21.2 and lttv-0.12.16-19062009. I still see the same
segfault and bt. Any more suggestions? :)
Dany
On Mon, Jun 29, 2009 at 8:20 AM, Mathieu Desnoyers <
compudj at krystal.dyndns.org> wrote:
> * Dany Madden (dany.r.madden at gmail.com) wrote:
> ...
>
>
> ISSUE3: lttv --memory causes segmentation fault. This is the gdb
backtrace:
> (gdb) run --memory -m textDump -t /tmp/trace1
> Starting program: /usr/bin/lttv.real --memory -m textDump -t /tmp/trace1
> [Thread debugging using libthread_db enabled]
> ** Message: Memory summary before main
> GLib Memory statistics (successful operations):
> blocks of | allocated | freed | allocated | freed | n_bytes
> n_bytes | n_times by | n_times by | n_times by | n_times by | remaining
> | malloc() | free() | realloc() | realloc() |
>
===========|============|============|============|============|===========
> 4 | 0 | 0 | 1 | 1 |
+0
> 12 | 1 | 0 | 0 | 0 |
+12
> 15 | 2 | 0 | 0 | 0 |
+30
> 16 | 0 | 0 | 2 | 1 |
+16
> 27 | 2 | 2 | 0 | 0 |
+0
> 32 | 0 | 1 | 1 | 0 |
+0
> 36 | 1 | 0 | 0 | 0 |
+36
> 64 | 0 | 1 | 1 | 0 |
+0
> GLib Memory statistics (failing operations):
> --- none ---
> Total bytes: allocated=264, zero-initialized=48 (18.18%), freed=170
> (64.39%), remaining=94
>
> Program received signal SIGSEGV, Segmentation fault.
> 0xb7daed7b in realloc () from /lib/libc.so.6
> (gdb) bt
> #0 0xb7daed7b in realloc () from /lib/libc.so.6
> #1 0xb7ef5bb3 in profiler_try_realloc (mem=0x806d018, n_bytes=4096) at
> gmem.c:559
> #2 0xb7ef6779 in profiler_realloc (mem=0x806d018, n_bytes=4096) at
> gmem.c:581
> #3 0xb7ef604a in IA__g_realloc (mem=0x806d018, n_bytes=4096) at
gmem.c:170
> #4 0xb7ed7b89 in IA__g_quark_from_string (string=0x80bcde8 "syscall 115")
> at gdataset.c:683
> #5 0x0805db85 in init (self=0x80b0200, ts=0x8078f28) at state.c:1915
> #6 0x08060d0f in init (self=0x80b0200, ts=0x8078f28) at stats.c:200
> #7 0xb7cda173 in process_traceset (hook_data=0x0, call_data=0x0) at
> batchAnalysis.c:83
> #8 0x08054346 in lttv_hooks_call (h=0x806f478, call_data=0x0) at
hook.c:272
> #9 0x08052a8d in main (argc=6, argv=0xbffff684) at main.c:219
>
Hrm, maybe a problem at the glib level ? You should try :
> - with a newer lttv version
> - with an updated glib
>
> to see if the problem persists.
I am still seeing the same bt with lttv-0.12.16-19062009 and glib 2.21.2
...
> >
> > ---> These modules are built into the kernel:
> > ltt-marker-control
> > ltt-tracer
> > ltt-serialize
> > ltt-relay
> >
> > ---> These are the modules that I loaded:
> > xracer5:~ # lsmod | grep ltt
> > ltt_type_serializer 2332 4 trap_trace,syscall_trace,mm_
> > trace,kernel_trace
> > ltt_trace_control 8400 0
> > ltt_statedump 8104 0
> > xracer5:~ # lsmod | grep trace
> > ltt_type_serializer 2332 4
> > trap_trace,syscall_trace,mm_trace,kernel_trace
> > ipc_trace 2048 4
> > kernel_trace 11112 31
> > ltt_trace_control 8400 0
> > mm_trace 4832 12
> > fs_trace 5176 16
> > syscall_trace 1584 2
> > trap_trace 1560 2
> >
> > ---> I ran ltt-armall
> > xracer5:/dany # ltt-armall
> > Connecting all markers
> > Connecting fd_state file_descriptor
> > Connecting fs buffer_wait_end
> > Connecting fs buffer_wait_start
> > Connecting fs close
> > Connecting fs exec
> > Connecting fs ioctl
> > Connecting fs llseek
> > Connecting fs lseek
> > Connecting fs open
> > Connecting fs pollfd
> > Connecting fs pread64
> > Connecting fs pwrite64
> > Connecting fs read
> > Connecting fs readv
> > Connecting fs select
> > Connecting fs write
> > Connecting fs writev
> > Connecting global_state statedump_end
> > Connecting input input_event
> > Connecting ipc call
> > Connecting ipc msg_create
> > Connecting ipc sem_create
> > Connecting ipc shm_create
> > Connecting irq_state idt_table
> > Connecting irq_state interrupt
> > Connecting kernel irq_entry
> > Connecting kernel irq_exit
> > Connecting kernel kthread_create
> > Connecting kernel kthread_stop
> > Connecting kernel kthread_stop_ret
> > Connecting kernel module_free
> > Connecting kernel module_load
> > Connecting kernel printk
> > Connecting kernel process_exit
> > Connecting kernel process_fork
> > Connecting kernel process_free
> > Connecting kernel process_wait
> > Connecting kernel sched_migrate_task
> > Connecting kernel sched_schedule
> > Connecting kernel sched_try_wakeup
> > Connecting kernel sched_wait_task
> > Connecting kernel sched_wakeup_new_task
> > Connecting kernel send_signal
> > Connecting kernel softirq_entry
> > Connecting kernel softirq_exit
> > Connecting kernel softirq_raise
> > Connecting kernel syscall_entry
> > Connecting kernel syscall_exit
> > Connecting kernel tasklet_high_entry
> > Connecting kernel tasklet_high_exit
> > Connecting kernel tasklet_low_entry
> > Connecting kernel tasklet_low_exit
> > Connecting kernel timer_itimer_expired
> > Connecting kernel timer_itimer_set
> > Connecting kernel timer_set
> > Connecting kernel timer_timeout
> > Connecting kernel timer_update_time
> > Connecting kernel trap_entry
> > Connecting kernel trap_exit
> > Connecting kernel vprintk
> > Connecting mm handle_fault_entry
> > Connecting mm handle_fault_exit
> > Connecting mm huge_page_alloc
> > Connecting mm huge_page_free
> > Connecting mm page_alloc
> > Connecting mm page_free
> > Connecting mm swap_file_close
> > Connecting mm swap_file_open
> > Connecting mm swap_in
> > Connecting mm swap_out
> > Connecting mm wait_on_page_end
> > Connecting mm wait_on_page_start
> > Connecting module_state list_module
> > Connecting netif_state network_ip_interface
> > Connecting netif_state network_ipv4_interface
> > Connecting softirq_state softirq_vec
> > Connecting swap_state statedump_swap_files
> > Connecting syscall_state sys_call_table
> > Connecting task_state process_state
> > Connecting vm_state vm_map
> > Connecting high-rate markers to tap
> >
> > ---> compiled and ran this ltttest program
> > #include <stdio.h>
> > void write_to_console(int id)
> > {
> > printf("%d:Hello\n", id);
> > sleep(1); /* Force the process to give up the CPU */
> > printf(" %d:World!\n", id);
> > }
> >
> > int main(void)
> > {
> > printf("parent pid:%d\n", getpid());
> > if(!fork())
> > write_to_console(1);
> > else
> > if(!fork())
> > write_to_console(2);
> >
> > sleep(5);
> > return 0;
> > }
> >
> > ---> lttctl -C -w /tmp/trace1 trace1
> > ---> ./ltttest
> > ---> lttctl -D trace1
> > ---> lttv -m textDump -e state.pid=3933 -e event.name=fork -t
> > /tmp/trace1
> >
> >
> > ** (process:3938): WARNING **: No channel for marker named
> > userspace.thread_brand found
> >
> > ** (process:3938): WARNING **: No channel for marker named
> > block._blk_request_issue found
> >
> > ** (process:3938): WARNING **: No channel for marker named
> > block._blk_request_complete found
> >
> > ** (process:3938): WARNING **: No channel for marker named
> > userspace.function_entry found
> >
> > ** (process:3938): WARNING **: No channel for marker named
> > userspace.function_exit found
> > Trace set contains 1 traces
> >
> > ....
> >
> > ---> lttv --memory -m textDump -e
> > event.name=page_alloc -t /tmp/trace1/
> > ** Message: Memory summary before main
> > GLib Memory statistics (successful operations):
> > blocks of | allocated | freed | allocated | freed | n_bytes
> > n_bytes | n_times by | n_times by | n_times by | n_times by |
> remaining
> > | malloc() | free() | realloc() | realloc() |
> >
> ===========|============|============|============|============|===========
> > 4 | 0 | 0 | 1 | 1 |
> +0
> > 12 | 1 | 0 | 0 | 0 |
> +12
> > 15 | 2 | 0 | 0 | 0 |
> +30
> > 16 | 0 | 0 | 2 | 1 |
> +16
> > 27 | 2 | 2 | 0 | 0 |
> +0
> > 32 | 0 | 1 | 1 | 0 |
> +0
> > 36 | 1 | 0 | 0 | 0 |
> +36
> > 64 | 0 | 1 | 1 | 0 |
> +0
> > GLib Memory statistics (failing operations):
> > --- none ---
> > Total bytes: allocated=264, zero-initialized=48 (18.18%), freed=170
> > (64.39%),
> > remaining=94
> > /usr/bin/lttv: line 15: 6494 Segmentation fault $0.real $*
> >
> > xracer5:~ # echo $?
> > 139
> >
> >
> > ---> lttv -m textDump -t
> > /tmp/trace1/ --fatal
> >
> > ** WARNING **: No channel for marker named userspace.thread_brand found
> > aborting...
> > /usr/bin/lttv: line 15: 6463 Aborted $0.real $*
> >
> > xracer5:~# echo $?
> > 134
> >
> >
> > -----
> > ~ Dany Madden
> >
> >
> >
> > --
> > -----
> > ~ Dany Madden
>
> > _______________________________________________
> > ltt-dev mailing list
> > ltt-dev at lists.casi.polymtl.ca
> > http://lists.casi.polymtl.ca/cgi-bin/mailman/listinfo/ltt-dev
>
>
> --
> Mathieu Desnoyers
> OpenPGP key fingerprint: 8CD5 52C3 8E3C 4140 715F BA06 3F25 A8FE 3BAE 9A68
>
--
-----
~ Dany Madden
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