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[Bug libc/20425] unbalanced and poor utilization of memory in glibc arenas may cause memory bloat and subsequent OOM
- From: "fweimer at redhat dot com" <sourceware-bugzilla at sourceware dot org>
- To: glibc-bugs at sourceware dot org
- Date: Tue, 02 Aug 2016 09:50:39 +0000
- Subject: [Bug libc/20425] unbalanced and poor utilization of memory in glibc arenas may cause memory bloat and subsequent OOM
- Auto-submitted: auto-generated
- References: <bug-20425-131@http.sourceware.org/bugzilla/>
https://sourceware.org/bugzilla/show_bug.cgi?id=20425
--- Comment #7 from Florian Weimer <fweimer at redhat dot com> ---
I cannot reproduce this with the -192 glibc. Can you provide lscpu output from
your test machine?
I tried your reproducer on:
Architecture: x86_64
CPU op-mode(s): 32-bit, 64-bit
Byte Order: Little Endian
CPU(s): 24
On-line CPU(s) list: 0-23
Thread(s) per core: 2
Core(s) per socket: 6
Socket(s): 2
NUMA node(s): 2
Vendor ID: GenuineIntel
CPU family: 6
Model: 63
Model name: Intel(R) Xeon(R) CPU E5-2620 v3 @ 2.40GHz
Stepping: 2
CPU MHz: 1200.000
BogoMIPS: 4788.56
Virtualization: VT-x
L1d cache: 32K
L1i cache: 32K
L2 cache: 256K
L3 cache: 15360K
NUMA node0 CPU(s): 0-5,12-17
NUMA node1 CPU(s): 6-11,18-23
And:
Architecture: x86_64
CPU op-mode(s): 32-bit, 64-bit
Byte Order: Little Endian
CPU(s): 240
On-line CPU(s) list: 0-239
Thread(s) per core: 2
Core(s) per socket: 15
Socket(s): 8
NUMA node(s): 8
Vendor ID: GenuineIntel
CPU family: 6
Model: 62
Model name: Intel(R) Xeon(R) CPU E7-8890 v2 @ 2.80GHz
Stepping: 7
CPU MHz: 1200.000
BogoMIPS: 5585.84
Virtualization: VT-x
L1d cache: 32K
L1i cache: 32K
L2 cache: 256K
L3 cache: 38400K
NUMA node0 CPU(s): 0-14,120-134
NUMA node1 CPU(s): 15-29,135-149
NUMA node2 CPU(s): 30-44,150-164
NUMA node3 CPU(s): 45-59,165-179
NUMA node4 CPU(s): 60-74,180-194
NUMA node5 CPU(s): 75-89,195-209
NUMA node6 CPU(s): 90-104,210-224
NUMA node7 CPU(s): 105-119,225-239
The latter limited to 192 arenas with MALLOC_ARENA_MAX=192.
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