From: Neil Horman <nhorman@tuxdriver.com>
To: "Damjan Marion (damarion)" <damarion@cisco.com>
Cc: "dev@dpdk.org" <dev@dpdk.org>
Subject: Re: [dpdk-dev] mmap fails with more than 40000 hugepages
Date: Thu, 5 Feb 2015 11:35:39 -0500 [thread overview]
Message-ID: <20150205163538.GA7036@hmsreliant.think-freely.org> (raw)
In-Reply-To: <6F7BF2F5-FBE9-4A52-86E6-813E2BE1840A@cisco.com>
On Thu, Feb 05, 2015 at 03:41:25PM +0000, Damjan Marion (damarion) wrote:
>
> > On 05 Feb 2015, at 15:59, Neil Horman <nhorman@tuxdriver.com> wrote:
> >
> > On Thu, Feb 05, 2015 at 01:20:01PM +0000, Damjan Marion (damarion) wrote:
> >>
> >>> On 05 Feb 2015, at 13:59, Neil Horman <nhorman@tuxdriver.com> wrote:
> >>>
> >>> On Thu, Feb 05, 2015 at 12:00:48PM +0000, Damjan Marion (damarion) wrote:
> >>>> Hi,
> >>>>
> >>>> I have system with 2 NUMA nodes and 256G RAM total. I noticed that DPDK crashes in rte_eal_init()
> >>>> when number of available hugepages is around 40000 or above.
> >>>> Everything works fine with lower values (i.e. 30000).
> >>>>
> >>>> I also tried with allocating 40000 on node0 and 0 on node1, same crash happens.
> >>>>
> >>>>
> >>>> Any idea what might be causing this?
> >>>>
> >>>> Thanks,
> >>>>
> >>>> Damjan
> >>>>
> >>>>
> >>>> $ cat /sys/devices/system/node/node[01]/hugepages/hugepages-2048kB/nr_hugepages
> >>>> 20000
> >>>> 20000
> >>>>
> >>>> $ grep -i huge /proc/meminfo
> >>>> AnonHugePages: 706560 kB
> >>>> HugePages_Total: 40000
> >>>> HugePages_Free: 40000
> >>>> HugePages_Rsvd: 0
> >>>> HugePages_Surp: 0
> >>>> Hugepagesize: 2048 kB
> >>>>
> >>> Whats your shmmax value set to? 40000 2MB hugepages is way above the default
> >>> setting for how much shared ram a system will allow. I've not done the math on
> >>> your logs below, but judging by the size of some of the mapped segments, I'm
> >>> betting your hitting the default limit of 4GB.
> >>
> >> $ cat /proc/sys/kernel/shmmax
> >> 33554432
> >>
> >> $ sysctl -w kernel.shmmax=8589934592
> >> kernel.shmmax = 8589934592
> >>
> >> same crash :(
> >>
> >> Thanks,
> >>
> >> Damjan
> >
> > What about the shmmni and shmmax values. The shmmax value will also need to be
> > set to at least 80G (more if you have other shared memory needs), and shmmni
> > will need to be larger than 40,000 to handle all the segments your creating.
> > Neil
>
> Hmm, if that is the reason, then 30000 will also not work. as both values are set by default to much much lower value.
>
> Anyway, I tried:
>
> $ sysctl kernel.shmmni
> kernel.shmmni = 100000
>
> $ sysctl kernel.shmmax
> kernel.shmmax = 274877906944
>
> $ cat /sys/devices/system/node/node[01]/hugepages/hugepages-2048kB/nr_hugepages
> 20000
> 20000
>
Hmm, then you probably need to start looking at other failure possibilities.
The segment that failed was requesting a size of about 38Gb. Is it possible
that your virtual memory map doesn't actually have a hole that large? That
would indicate a bug in the eal init path, since it searches for that. Time to
start adding some printf and dumping your /proc/pid/maps file
Neil
> $ sudo ~/src/dpdk/x86_64-native-linuxapp-gcc/app/testpmd -l 5-7 -n 3 --socket-mem 512,512
> EAL: Detected lcore 0 as core 0 on socket 0
> EAL: Detected lcore 1 as core 1 on socket 0
> EAL: Detected lcore 2 as core 2 on socket 0
> EAL: Detected lcore 3 as core 3 on socket 0
> EAL: Detected lcore 4 as core 4 on socket 0
> EAL: Detected lcore 5 as core 5 on socket 0
> EAL: Detected lcore 6 as core 6 on socket 0
> EAL: Detected lcore 7 as core 7 on socket 0
> EAL: Detected lcore 8 as core 0 on socket 1
> EAL: Detected lcore 9 as core 1 on socket 1
> EAL: Detected lcore 10 as core 2 on socket 1
> EAL: Detected lcore 11 as core 3 on socket 1
> EAL: Detected lcore 12 as core 4 on socket 1
> EAL: Detected lcore 13 as core 5 on socket 1
> EAL: Detected lcore 14 as core 6 on socket 1
> EAL: Detected lcore 15 as core 7 on socket 1
> EAL: Detected lcore 16 as core 0 on socket 0
> EAL: Detected lcore 17 as core 1 on socket 0
> EAL: Detected lcore 18 as core 2 on socket 0
> EAL: Detected lcore 19 as core 3 on socket 0
> EAL: Detected lcore 20 as core 4 on socket 0
> EAL: Detected lcore 21 as core 5 on socket 0
> EAL: Detected lcore 22 as core 6 on socket 0
> EAL: Detected lcore 23 as core 7 on socket 0
> EAL: Detected lcore 24 as core 0 on socket 1
> EAL: Detected lcore 25 as core 1 on socket 1
> EAL: Detected lcore 26 as core 2 on socket 1
> EAL: Detected lcore 27 as core 3 on socket 1
> EAL: Detected lcore 28 as core 4 on socket 1
> EAL: Detected lcore 29 as core 5 on socket 1
> EAL: Detected lcore 30 as core 6 on socket 1
> EAL: Detected lcore 31 as core 7 on socket 1
> EAL: Support maximum 128 logical core(s) by configuration.
> EAL: Detected 32 lcore(s)
> EAL: VFIO modules not all loaded, skip VFIO support...
> EAL: Setting up memory...
> EAL: Ask a virtual area of 0x80000000 bytes
> EAL: Virtual area found at 0x7fe280000000 (size = 0x80000000)
> EAL: Ask a virtual area of 0x80000000 bytes
> EAL: Virtual area found at 0x7fe1c0000000 (size = 0x80000000)
> EAL: Ask a virtual area of 0x200000 bytes
> EAL: Virtual area found at 0x7fe335c00000 (size = 0x200000)
> EAL: Ask a virtual area of 0x9400000 bytes
> EAL: Virtual area found at 0x7fe32c600000 (size = 0x9400000)
> EAL: Ask a virtual area of 0x5c00000 bytes
> EAL: Virtual area found at 0x7fe326800000 (size = 0x5c00000)
> EAL: Ask a virtual area of 0x38e00000 bytes
> EAL: Virtual area found at 0x7fe247000000 (size = 0x38e00000)
> EAL: Ask a virtual area of 0x200000 bytes
> EAL: Virtual area found at 0x7fe326400000 (size = 0x200000)
> EAL: Ask a virtual area of 0x8000000 bytes
> EAL: Virtual area found at 0x7fe31e200000 (size = 0x8000000)
> EAL: Ask a virtual area of 0x815800000 bytes
> EAL: Virtual area found at 0x7fd9aa600000 (size = 0x815800000)
> EAL: Ask a virtual area of 0x1f400000 bytes
> EAL: Virtual area found at 0x7fd98b000000 (size = 0x1f400000)
> EAL: Ask a virtual area of 0xfd400000 bytes
> EAL: Virtual area found at 0x7fd88da00000 (size = 0xfd400000)
> EAL: Ask a virtual area of 0x200000 bytes
> EAL: Virtual area found at 0x7fe31de00000 (size = 0x200000)
> EAL: Ask a virtual area of 0x200000 bytes
> EAL: Virtual area found at 0x7fe31da00000 (size = 0x200000)
> EAL: Ask a virtual area of 0x200000 bytes
> EAL: Virtual area found at 0x7fe31d600000 (size = 0x200000)
> EAL: Ask a virtual area of 0x200000 bytes
> EAL: Virtual area found at 0x7fe31d200000 (size = 0x200000)
> EAL: Ask a virtual area of 0x200000 bytes
> EAL: Virtual area found at 0x7fe31ce00000 (size = 0x200000)
> EAL: Ask a virtual area of 0x200000 bytes
> EAL: Virtual area found at 0x7fe31ca00000 (size = 0x200000)
> EAL: Ask a virtual area of 0x200000 bytes
> EAL: Virtual area found at 0x7fe31c600000 (size = 0x200000)
> EAL: Ask a virtual area of 0x200000 bytes
> EAL: Virtual area found at 0x7fe31c200000 (size = 0x200000)
> EAL: Ask a virtual area of 0x400000 bytes
> EAL: Virtual area found at 0x7fe31bc00000 (size = 0x400000)
> EAL: Ask a virtual area of 0x400000 bytes
> EAL: Virtual area found at 0x7fe31b600000 (size = 0x400000)
> EAL: Ask a virtual area of 0x200000 bytes
> EAL: Virtual area found at 0x7fe31b200000 (size = 0x200000)
> EAL: Ask a virtual area of 0x200000 bytes
> EAL: Virtual area found at 0x7fe31ae00000 (size = 0x200000)
> EAL: Ask a virtual area of 0x200000 bytes
> EAL: Virtual area found at 0x7fe31aa00000 (size = 0x200000)
> EAL: Ask a virtual area of 0x200000 bytes
> EAL: Virtual area found at 0x7fe31a600000 (size = 0x200000)
> EAL: Ask a virtual area of 0x200000 bytes
> EAL: Virtual area found at 0x7fe31a200000 (size = 0x200000)
> EAL: Ask a virtual area of 0x400000 bytes
> EAL: Virtual area found at 0x7fe319c00000 (size = 0x400000)
> EAL: Ask a virtual area of 0x200000 bytes
> EAL: Virtual area found at 0x7fe319800000 (size = 0x200000)
> EAL: Ask a virtual area of 0x200000 bytes
> EAL: Virtual area found at 0x7fe319400000 (size = 0x200000)
> EAL: Ask a virtual area of 0x200000 bytes
> EAL: Virtual area found at 0x7fe319000000 (size = 0x200000)
> EAL: Ask a virtual area of 0x200000 bytes
> EAL: Virtual area found at 0x7fe318c00000 (size = 0x200000)
> EAL: Ask a virtual area of 0x200000 bytes
> EAL: Virtual area found at 0x7fe318800000 (size = 0x200000)
> EAL: Ask a virtual area of 0x200000 bytes
> EAL: Virtual area found at 0x7fe318400000 (size = 0x200000)
> EAL: Ask a virtual area of 0x200000 bytes
> EAL: Virtual area found at 0x7fe318000000 (size = 0x200000)
> EAL: Ask a virtual area of 0x200000 bytes
> EAL: Virtual area found at 0x7fe317c00000 (size = 0x200000)
> EAL: Ask a virtual area of 0x200000 bytes
> EAL: Virtual area found at 0x7fe317800000 (size = 0x200000)
> EAL: Ask a virtual area of 0x200000 bytes
> EAL: Virtual area found at 0x7fe317400000 (size = 0x200000)
> EAL: Ask a virtual area of 0x200000 bytes
> EAL: Virtual area found at 0x7fe317000000 (size = 0x200000)
> EAL: Ask a virtual area of 0x200000 bytes
> EAL: Virtual area found at 0x7fe316c00000 (size = 0x200000)
> EAL: Ask a virtual area of 0x200000 bytes
> EAL: Virtual area found at 0x7fe316800000 (size = 0x200000)
> EAL: Ask a virtual area of 0x200000 bytes
> EAL: Virtual area found at 0x7fe316400000 (size = 0x200000)
> EAL: Ask a virtual area of 0x200000 bytes
> EAL: Virtual area found at 0x7fe316000000 (size = 0x200000)
> EAL: Ask a virtual area of 0x200000 bytes
> EAL: Virtual area found at 0x7fe315c00000 (size = 0x200000)
> EAL: Ask a virtual area of 0x200000 bytes
> EAL: Virtual area found at 0x7fe315800000 (size = 0x200000)
> EAL: Ask a virtual area of 0x200000 bytes
> EAL: Virtual area found at 0x7fe315400000 (size = 0x200000)
> EAL: Ask a virtual area of 0x200000 bytes
> EAL: Virtual area found at 0x7fe315000000 (size = 0x200000)
> EAL: Ask a virtual area of 0x200000 bytes
> EAL: Virtual area found at 0x7fe314c00000 (size = 0x200000)
> EAL: Ask a virtual area of 0x200000 bytes
> EAL: Virtual area found at 0x7fe314800000 (size = 0x200000)
> EAL: Ask a virtual area of 0x200000 bytes
> EAL: Virtual area found at 0x7fe314400000 (size = 0x200000)
> EAL: Ask a virtual area of 0x200000 bytes
> EAL: Virtual area found at 0x7fe314000000 (size = 0x200000)
> EAL: Ask a virtual area of 0x200000 bytes
> EAL: Virtual area found at 0x7fe313c00000 (size = 0x200000)
> EAL: Ask a virtual area of 0x200000 bytes
> EAL: Virtual area found at 0x7fe313800000 (size = 0x200000)
> EAL: Ask a virtual area of 0x200000 bytes
> EAL: Virtual area found at 0x7fe313400000 (size = 0x200000)
> EAL: Ask a virtual area of 0x200000 bytes
> EAL: Virtual area found at 0x7fe313000000 (size = 0x200000)
> EAL: Ask a virtual area of 0x200000 bytes
> EAL: Virtual area found at 0x7fe312c00000 (size = 0x200000)
> EAL: Ask a virtual area of 0x200000 bytes
> EAL: Virtual area found at 0x7fe312800000 (size = 0x200000)
> EAL: Ask a virtual area of 0x200000 bytes
> EAL: Virtual area found at 0x7fe312400000 (size = 0x200000)
> EAL: Ask a virtual area of 0x200000 bytes
> EAL: Virtual area found at 0x7fe312000000 (size = 0x200000)
> EAL: Ask a virtual area of 0x200000 bytes
> EAL: Virtual area found at 0x7fe311c00000 (size = 0x200000)
> EAL: Ask a virtual area of 0x200000 bytes
> EAL: Virtual area found at 0x7fe311800000 (size = 0x200000)
> EAL: Ask a virtual area of 0x200000 bytes
> EAL: Virtual area found at 0x7fe311400000 (size = 0x200000)
> EAL: Ask a virtual area of 0x200000 bytes
> EAL: Virtual area found at 0x7fe311000000 (size = 0x200000)
> EAL: Ask a virtual area of 0x200000 bytes
> EAL: Virtual area found at 0x7fe310c00000 (size = 0x200000)
> EAL: Ask a virtual area of 0x200000 bytes
> EAL: Virtual area found at 0x7fe310800000 (size = 0x200000)
> EAL: Ask a virtual area of 0x200000 bytes
> EAL: Virtual area found at 0x7fe310400000 (size = 0x200000)
> EAL: Ask a virtual area of 0x400000 bytes
> EAL: Virtual area found at 0x7fe30fe00000 (size = 0x400000)
> EAL: Ask a virtual area of 0x200000 bytes
> EAL: Virtual area found at 0x7fe30fa00000 (size = 0x200000)
> EAL: Ask a virtual area of 0x200000 bytes
> EAL: Virtual area found at 0x7fe30f600000 (size = 0x200000)
> EAL: Ask a virtual area of 0x200000 bytes
> EAL: Virtual area found at 0x7fe30f200000 (size = 0x200000)
> EAL: Ask a virtual area of 0x200000 bytes
> EAL: Virtual area found at 0x7fe30ee00000 (size = 0x200000)
> EAL: Ask a virtual area of 0x200000 bytes
> EAL: Virtual area found at 0x7fe30ea00000 (size = 0x200000)
> EAL: Ask a virtual area of 0x200000 bytes
> EAL: Virtual area found at 0x7fe30e600000 (size = 0x200000)
> EAL: Ask a virtual area of 0x200000 bytes
> EAL: Virtual area found at 0x7fe30e200000 (size = 0x200000)
> EAL: Ask a virtual area of 0x400000 bytes
> EAL: Virtual area found at 0x7fe30dc00000 (size = 0x400000)
> EAL: Ask a virtual area of 0x200000 bytes
> EAL: Virtual area found at 0x7fe30d800000 (size = 0x200000)
> EAL: Ask a virtual area of 0x200000 bytes
> EAL: Virtual area found at 0x7fe30d400000 (size = 0x200000)
> EAL: Ask a virtual area of 0x200000 bytes
> EAL: Virtual area found at 0x7fe30d000000 (size = 0x200000)
> EAL: Ask a virtual area of 0x200000 bytes
> EAL: Virtual area found at 0x7fe30cc00000 (size = 0x200000)
> EAL: Ask a virtual area of 0x200000 bytes
> EAL: Virtual area found at 0x7fe30c800000 (size = 0x200000)
> EAL: Ask a virtual area of 0x200000 bytes
> EAL: Virtual area found at 0x7fe30c400000 (size = 0x200000)
> EAL: Ask a virtual area of 0x200000 bytes
> EAL: Virtual area found at 0x7fe30c000000 (size = 0x200000)
> EAL: Ask a virtual area of 0x200000 bytes
> EAL: Virtual area found at 0x7fe30bc00000 (size = 0x200000)
> EAL: Ask a virtual area of 0x200000 bytes
> EAL: Virtual area found at 0x7fe30b800000 (size = 0x200000)
> EAL: Ask a virtual area of 0x200000 bytes
> EAL: Virtual area found at 0x7fe30b400000 (size = 0x200000)
> EAL: Ask a virtual area of 0x200000 bytes
> EAL: Virtual area found at 0x7fe30b000000 (size = 0x200000)
> EAL: Ask a virtual area of 0x200000 bytes
> EAL: Virtual area found at 0x7fe30ac00000 (size = 0x200000)
> EAL: Ask a virtual area of 0x200000 bytes
> EAL: Virtual area found at 0x7fe30a800000 (size = 0x200000)
> EAL: Ask a virtual area of 0x200000 bytes
> EAL: Virtual area found at 0x7fe30a400000 (size = 0x200000)
> EAL: Ask a virtual area of 0x200000 bytes
> EAL: Virtual area found at 0x7fe30a000000 (size = 0x200000)
> EAL: Ask a virtual area of 0x200000 bytes
> EAL: Virtual area found at 0x7fe309c00000 (size = 0x200000)
> EAL: Ask a virtual area of 0x200000 bytes
> EAL: Virtual area found at 0x7fe309800000 (size = 0x200000)
> EAL: Ask a virtual area of 0x200000 bytes
> EAL: Virtual area found at 0x7fe309400000 (size = 0x200000)
> EAL: Ask a virtual area of 0x200000 bytes
> EAL: Virtual area found at 0x7fe309000000 (size = 0x200000)
> EAL: Ask a virtual area of 0x200000 bytes
> EAL: Virtual area found at 0x7fe308c00000 (size = 0x200000)
> EAL: Ask a virtual area of 0x200000 bytes
> EAL: Virtual area found at 0x7fe308800000 (size = 0x200000)
> EAL: Ask a virtual area of 0x2f800000 bytes
> EAL: Virtual area found at 0x7fd85e000000 (size = 0x2f800000)
> EAL: Ask a virtual area of 0x7400000 bytes
> EAL: Virtual area found at 0x7fe301200000 (size = 0x7400000)
> EAL: Ask a virtual area of 0x9b5400000 bytes
> EAL: Virtual area found at 0x7fcea8a00000 (size = 0x9b5400000)
> EAL: map_all_hugepages(): mmap failed: Cannot allocate memory
> EAL: Failed to remap 2 MB pages
> PANIC in rte_eal_init():
> Cannot init memory
>
>
>
next prev parent reply other threads:[~2015-02-05 16:35 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-02-05 12:00 Damjan Marion (damarion)
2015-02-05 12:59 ` Neil Horman
2015-02-05 13:20 ` Damjan Marion (damarion)
2015-02-05 14:59 ` Neil Horman
2015-02-05 15:41 ` Damjan Marion (damarion)
2015-02-05 16:35 ` Neil Horman [this message]
2015-02-05 13:22 ` Jay Rolette
2015-02-05 13:36 ` Damjan Marion (damarion)
2015-02-05 15:09 ` Jay Rolette
2015-02-06 1:46 ` Linhaifeng
2015-02-06 2:04 ` Linhaifeng
2015-02-06 10:26 ` De Lara Guarch, Pablo
2015-02-06 10:31 ` Damjan Marion (damarion)
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