While trying to get stat of the guest process (configured with hugepages), numastat fails
====================
Environment details
====================
Linux lep8b 4.8.0-30-generic #32-Ubuntu SMP Fri Dec 2 03:43:46 UTC 2016 ppc64le ppc64le ppc64le GNU/Linu
=====
Issue
=====
2016-12-14 07:02:56,396 process L0368 INFO | Running 'numastat 61257'
2016-12-14 07:02:56,402 process L0462 DEBUG| [stderr] *** Error in `numastat': double free or corruption (out): 0x00000100265005a0 ***
2016-12-14 07:02:56,403 process L0462 DEBUG| [stdout]
2016-12-14 07:02:56,403 process L0482 INFO | Command 'numastat 61257' finished with -6 after 0.00309896469116s
2016-12-14 07:02:56,403 process L0462 DEBUG| [stdout] Per-node process memory usage (in MBs) for PID 61257 (qemu-system-ppc)
2016-12-14 07:02:56,404 process L0462 DEBUG| [stderr] ======= Backtrace: =========
2016-12-14 07:02:56,404 process L0462 DEBUG| [stderr] /lib/powerpc64le-linux-gnu/libc.so.6(+0x86d54)[0x3fff9a736d54]
2016-12-14 07:02:56,404 process L0462 DEBUG| [stderr] /lib/powerpc64le-linux-gnu/libc.so.6(+0x93c30)[0x3fff9a743c30]
2016-12-14 07:02:56,404 process L0462 DEBUG| [stderr] /lib/powerpc64le-linux-gnu/libc.so.6(cfree+0x68)[0x3fff9a748218]
2016-12-14 07:02:56,405 process L0462 DEBUG| [stderr] /lib/powerpc64le-linux-gnu/libc.so.6(fclose+0x1c8)[0x3fff9a727d68]
2016-12-14 07:02:56,405 process L0462 DEBUG| [stderr] numastat(+0x7aa4)[0x401d7aa4]
2016-12-14 07:02:56,405 process L0462 DEBUG| [stderr] numastat(+0x2388)[0x401d2388]
2016-12-14 07:02:56,405 process L0462 DEBUG| [stderr] /lib/powerpc64le-linux-gnu/libc.so.6(+0x2291c)[0x3fff9a6d291c]
2016-12-14 07:02:56,405 process L0462 DEBUG| [stderr] /lib/powerpc64le-linux-gnu/libc.so.6(__libc_start_main+0xb8)[0x3fff9a6d2b18]
2016-12-14 07:02:56,405 process L0462 DEBUG| [stderr] ======= Memory map: ========
2016-12-14 07:02:56,405 process L0462 DEBUG| [stderr] 401d0000-401e0000 r-xp 00000000 08:92 40325510 /usr/bin/numastat
2016-12-14 07:02:56,405 process L0462 DEBUG| [stderr] 401e0000-401f0000 r--p 00000000 08:92 40325510 /usr/bin/numastat
2016-12-14 07:02:56,406 process L0462 DEBUG| [stderr] 401f0000-40200000 rw-p 00010000 08:92 40325510 /usr/bin/numastat
2016-12-14 07:02:56,406 process L0462 DEBUG| [stderr] 10026500000-10026530000 rw-p 00000000 00:00 0 [heap]
2016-12-14 07:02:56,406 process L0462 DEBUG| [stderr] 3fff9a6b0000-3fff9a860000 r-xp 00000000 08:92 25745199 /lib/powerpc64le-linux-gnu/libc-2.24.so
2016-12-14 07:02:56,406 process L0462 DEBUG| [stderr] 3fff9a860000-3fff9a870000 ---p 001b0000 08:92 25745199 /lib/powerpc64le-linux-gnu/libc-2.24.so
2016-12-14 07:02:56,406 process L0462 DEBUG| [stderr] 3fff9a870000-3fff9a880000 r--p 001b0000 08:92 25745199 /lib/powerpc64le-linux-gnu/libc-2.24.so
2016-12-14 07:02:56,406 process L0462 DEBUG| [stderr] 3fff9a880000-3fff9a890000 rw-p 001c0000 08:92 25745199 /lib/powerpc64le-linux-gnu/libc-2.24.so
2016-12-14 07:02:56,406 process L0462 DEBUG| [stderr] 3fff9a8b0000-3fff9a8c0000 rw-p 00000000 00:00 0
2016-12-14 07:02:56,407 process L0462 DEBUG| [stderr] 3fff9a8c0000-3fff9a8e0000 r-xp 00000000 00:00 0 [vdso]
2016-12-14 07:02:56,407 process L0462 DEBUG| [stderr] 3fff9a8e0000-3fff9a920000 r-xp 00000000 08:92 25745195 /lib/powerpc64le-linux-gnu/ld-2.24.so
2016-12-14 07:02:56,407 process L0462 DEBUG| [stderr] 3fff9a920000-3fff9a930000 r--p 00030000 08:92 25745195 /lib/powerpc64le-linux-gnu/ld-2.24.so
2016-12-14 07:02:56,407 process L0462 DEBUG| [stderr] 3fff9a930000-3fff9a940000 rw-p 00040000 08:92 25745195 /lib/powerpc64le-linux-gnu/ld-2.24.so
2016-12-14 07:02:56,407 process L0462 DEBUG| [stderr] 3fffdd320000-3fffdd350000 rw-p 00000000 00:00 0 [stack]
=============
Recreation Steps
=============
1. Configure host with hugepages
2. Start a guest and attach following memory device xml,
<?xml version='1.0' encoding='UTF-8'?>
<memory model="dimm"><target><size unit="KiB">8388608</size><node>0</node></target><source><pagesize unit="KiB">16384</pagesize><nodemask>0</nodemask></source></memory>
3. Set the rules in guest
4. execute numastat of guest pid
Expected Result :
Provide PID numastat
Per-node process memory usage (in MBs) for PID 55119 (qemu-system-ppc)
Node 0 Node 1 Node 16
--------------- --------------- ---------------
Huge 0.00 0.00 0.00
Heap 2.00 0.38 0.00
Stack 0.00 0.00 0.00
Private 31800.12 183.06 0.00
---------------- --------------- --------------- ---------------
Total 31802.12 183.44 0.00
Node 17 Total
--------------- ---------------
Huge 0.00 0.00
Heap 0.00 15.25
Stack 0.00 0.06
Private 0.00 33169.31
---------------- --------------- ---------------
Total 0.00 34345.00
*** Error in `numastat': free(): invalid next size (fast): 0x000001003f2c0580 ***
======= Backtrace: =========
/lib/powerpc64le-linux-gnu/libc.so.6(+0x86d54)[0x3fff82866d54]
/lib/powerpc64le-linux-gnu/libc.so.6(+0x93c30)[0x3fff82873c30]
/lib/powerpc64le-linux-gnu/libc.so.6(cfree+0x68)[0x3fff82878218]
numastat(+0x4244)[0x5adc4244]
numastat(+0x7d24)[0x5adc7d24]
numastat(+0x2388)[0x5adc2388]
/lib/powerpc64le-linux-gnu/libc.so.6(+0x2291c)[0x3fff8280291c]
/lib/powerpc64le-linux-gnu/libc.so.6(__libc_start_main+0xb8)[0x3fff82802b18]
======= Memory map: ========
5adc0000-5add0000 r-xp 00000000 08:92 40325510 /usr/bin/numastat
5add0000-5ade0000 r--p 00000000 08:92 40325510 /usr/bin/numastat
5ade0000-5adf0000 rw-p 00010000 08:92 40325510 /usr/bin/numastat
1003f2c0000-1003f2f0000 rw-p 00000000 00:00 0 [heap]
3fff827e0000-3fff82990000 r-xp 00000000 08:92 25745199 /lib/powerpc64le-linux-gnu/libc-2.24.so
3fff82990000-3fff829a0000 ---p 001b0000 08:92 25745199 /lib/powerpc64le-linux-gnu/libc-2.24.so
3fff829a0000-3fff829b0000 r--p 001b0000 08:92 25745199 /lib/powerpc64le-linux-gnu/libc-2.24.so
3fff829b0000-3fff829c0000 rw-p 001c0000 08:92 25745199 /lib/powerpc64le-linux-gnu/libc-2.24.so
3fff829e0000-3fff829f0000 rw-p 00000000 00:00 0
3fff829f0000-3fff82a10000 r-xp 00000000 00:00 0 [vdso]
3fff82a10000-3fff82a50000 r-xp 00000000 08:92 25745195 /lib/powerpc64le-linux-gnu/ld-2.24.so
3fff82a50000-3fff82a60000 r--p 00030000 08:92 25745195 /lib/powerpc64le-linux-gnu/ld-2.24.so
3fff82a60000-3fff82a70000 rw-p 00040000 08:92 25745195 /lib/powerpc64le-linux-gnu/ld-2.24.so
3fffc3b90000-3fffc3bc0000 rw-p 00000000 00:00 0 [stack]
Aborted
Signed-off-by: Seeteena Thoufeek <s1seetee@xxxxxxxxxxxxxxxxxx>
---
numastat.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/numastat.c b/numastat.c
index 1924dba..67902d0 100644
--- a/numastat.c
+++ b/numastat.c
@@ -1054,7 +1054,11 @@ void show_process_info() {
} else {
tmp_row = header_rows + pid_ix;
}
- int tmp_col = header_cols + node_num;
+ // Don't assume nodes are sequential or contiguous.
+ // Need to find correct tmp_col from node_ix_map
+ int i = 0;
+ while(node_ix_map[i++] != node_num);
+ int tmp_col = header_cols + i - 1;
double_addto(&table, tmp_row, tmp_col, value);
double_addto(&table, tmp_row, total_col_ix, value);
double_addto(&table, total_row_ix, tmp_col, value);
--
1.8.3.1
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