* [dpdk-users] Unable to setup hugepages
@ 2021-05-31 15:35 Gabriel Danjon
2021-06-01 7:58 ` Thomas Monjalon
0 siblings, 1 reply; 3+ messages in thread
From: Gabriel Danjon @ 2021-05-31 15:35 UTC (permalink / raw)
To: users
Cc: Alexis DANJON, Antoine LORIN, Laurent CHABENET, gregory.fresnais,
Julien RAMET
Hello,
After successfully installed the DPDK 20.11 on my Centos 8-Stream
(minimal), I am trying to configure the hugepages but encounters a lot
of difficulties.
I am trying to reserve 4 hugepages of 1GB.
Here the steps I have done following the documentation
(https://doc.dpdk.org/guides-20.11/linux_gsg/sys_reqs.html):
Additional information about meminfo :
cat /proc/meminfo
MemTotal: 32619404 kB
MemFree: 27331024 kB
MemAvailable: 27415524 kB
Buffers: 4220 kB
Cached: 328628 kB
SwapCached: 0 kB
Active: 194828 kB
Inactive: 210156 kB
Active(anon): 1744 kB
Inactive(anon): 83384 kB
Active(file): 193084 kB
Inactive(file): 126772 kB
Unevictable: 0 kB
Mlocked: 0 kB
SwapTotal: 16474108 kB
SwapFree: 16474108 kB
Dirty: 0 kB
Writeback: 0 kB
AnonPages: 72136 kB
Mapped: 84016 kB
Shmem: 12992 kB
KReclaimable: 211956 kB
Slab: 372852 kB
SReclaimable: 211956 kB
SUnreclaim: 160896 kB
KernelStack: 9120 kB
PageTables: 6852 kB
NFS_Unstable: 0 kB
Bounce: 0 kB
WritebackTmp: 0 kB
CommitLimit: 30686656 kB
Committed_AS: 270424 kB
VmallocTotal: 34359738367 kB
VmallocUsed: 0 kB
VmallocChunk: 0 kB
Percpu: 28416 kB
HardwareCorrupted: 0 kB
AnonHugePages: 10240 kB
ShmemHugePages: 0 kB
ShmemPmdMapped: 0 kB
FileHugePages: 0 kB
FilePmdMapped: 0 kB
HugePages_Total: 0
HugePages_Free: 0
HugePages_Rsvd: 0
HugePages_Surp: 0
Hugepagesize: 1048576 kB
Hugetlb: 4194304 kB
DirectMap4k: 225272 kB
DirectMap2M: 4919296 kB
DirectMap1G: 30408704 kB
1 Step follow documentation
bash -c 'echo 2048 > /sys/kernel/mm/hugepages/hugepages-2048kB/nr_hugepages'
As we're working on a NUMA machine we do this too. (We even do the
previous step because without it, it provides more errors)
bash -c 'echo 2048 >
/sys/devices/system/node/node0/hugepages/hugepages-2048kB/nr_hugepages' && \
bash -c 'echo 2048 >
/sys/devices/system/node/node1/hugepages/hugepages-2048kB/nr_hugepages'
mkdir /mnt/huge
mount -t hugetlbfs pagesize=1GB /mnt/huge
bash -c 'echo nodev /mnt/huge hugetlbfs pagesize=1GB 0 0 >> /etc/fstab'
So here the result of my meminfo (cat /proc/meminfo | grep Huge) :
AnonHugePages: 10240 kB
ShmemHugePages: 0 kB
FileHugePages: 0 kB
HugePages_Total: 0
HugePages_Free: 0
HugePages_Rsvd: 0
HugePages_Surp: 0
Hugepagesize: 1048576 kB
Hugetlb: 4194304 kB
It looks strange that there is no total and free hugepages.
I tried the dpdk-testpmd using the DPDK documentation : dpdk-testpmd -l
0-3 -n 4 -- -i --nb-cores=2
EAL: Detected 48 lcore(s)
EAL: Detected 2 NUMA nodes
EAL: Detected static linkage of DPDK
EAL: Multi-process socket /var/run/dpdk/rte/mp_socket
EAL: Selected IOVA mode 'PA'
EAL: 2048 hugepages of size 2097152 reserved, but no mounted hugetlbfs
found for that size
EAL: No free hugepages reported in hugepages-1048576kB
EAL: No free hugepages reported in hugepages-1048576kB
EAL: No available hugepages reported in hugepages-1048576kB
EAL: FATAL: Cannot get hugepage information.
EAL: Cannot get hugepage information.
EAL: Error - exiting with code: 1
Cause: Cannot init EAL: Permission denied
So I checked in the /mnt/huge to look if files had been created (ls
/mnt/huge/ -la) : Empty folder
Then I checked if my folder was correctly mounted : mount | grep huge
pagesize=1GB on /mnt/huge type hugetlbfs
(rw,relatime,seclabel,pagesize=1024M)
Then I tried the helloworld example (make clean && make &&
./build/helloworld):
EAL: Detected 48 lcore(s)
EAL: Detected 2 NUMA nodes
EAL: Detected shared linkage of DPDK
EAL: Multi-process socket /var/run/dpdk/rte/mp_socket
EAL: Selected IOVA mode 'PA'
EAL: 2048 hugepages of size 2097152 reserved, but no mounted hugetlbfs
found for that size
EAL: No free 1048576 kB hugepages reported on node 0
EAL: No free 1048576 kB hugepages reported on node 1
EAL: No available 1048576 kB hugepages reported
EAL: FATAL: Cannot get hugepage information.
EAL: Cannot get hugepage information.
PANIC in main():
Cannot init EAL
5: [./build/helloworld() [0x40079e]]
4: [/lib64/libc.so.6(__libc_start_main+0xf3) [0x7ff43a6f6493]]
3: [./build/helloworld() [0x4006e6]]
2: [/usr/local/lib64/librte_eal.so.21(__rte_panic+0xba) [0x7ff43aaa4b93]]
1: [/usr/local/lib64/librte_eal.so.21(rte_dump_stack+0x1b) [0x7ff43aac79fb]]
Aborted (core dumped)
So I guessed the problem came from the : Hugepagesize: 1048576 kB
(from cat /proc/meminfo | grep Huge).
2 Step adapt documentation
Then I decided to set the values for 1048576KB:
bash -c 'echo 4 >
/sys/devices/system/node/node0/hugepages/hugepages-1048576kB/nr_hugepages'
bash -c 'echo 4 >
/sys/devices/system/node/node1/hugepages/hugepages-1048576kB/nr_hugepages'
bash -c 'echo 4 > /sys/kernel/mm/hugepages/hugepages-1048576kB/nr_hugepages'
So here the result of my meminfo (cat /proc/meminfo | grep Huge) :
AnonHugePages: 10240 kB
ShmemHugePages: 0 kB
FileHugePages: 0 kB
HugePages_Total: 4
HugePages_Free: 4
HugePages_Rsvd: 0
HugePages_Surp: 0
Hugepagesize: 1048576 kB
Hugetlb: 8388608 kB
So here I have my 4 pages sat.
Then I retried the previous steps and here what I got :
dpdk-testpmd -l 0-3 -n 4 -- -i --nb-cores=2
EAL: Detected 48 lcore(s)
EAL: Detected 2 NUMA nodes
EAL: Detected static linkage of DPDK
EAL: Multi-process socket /var/run/dpdk/rte/mp_socket
EAL: Selected IOVA mode 'PA'
EAL: 2048 hugepages of size 2097152 reserved, but no mounted hugetlbfs
found for that size
EAL: Probing VFIO support...
testpmd: No probed ethernet devices
Interactive-mode selected
testpmd: create a new mbuf pool <mb_pool_0>: n=171456, size=2176, socket=0
testpmd: preferred mempool ops selected: ring_mp_mc
Done
testpmd>
Bye...
make clean && make && ./build/helloworld
EAL: Detected 48 lcore(s)
EAL: Detected 2 NUMA nodes
EAL: Detected shared linkage of DPDK
EAL: Multi-process socket /var/run/dpdk/rte/mp_socket
EAL: Selected IOVA mode 'PA'
EAL: 2048 hugepages of size 2097152 reserved, but no mounted hugetlbfs
found for that size
TELEMETRY: No legacy callbacks, legacy socket not created
cat /proc/meminfo | grep Huge
AnonHugePages: 10240 kB
ShmemHugePages: 0 kB
FileHugePages: 0 kB
HugePages_Total: 4
HugePages_Free: 3
HugePages_Rsvd: 0
HugePages_Surp: 0
Hugepagesize: 1048576 kB
Hugetlb: 8388608 kB
One huge page looks like have been used.
ls -l /mnt/huge/
total 1048576
1073741824 rtemap_0
So yes one has been created, but 2048 hugepages of size 2097152
reserved, but no mounted hugetlbfs found for that size, happens.
So to try to understand what happens I reset
hugepages-2048kB/nr_hugepages to 0 :
bash -c 'echo 0 >
/sys/devices/system/node/node0/hugepages/hugepages-2048kB/nr_hugepages' && \
bash -c 'echo 0 >
/sys/devices/system/node/node1/hugepages/hugepages-2048kB/nr_hugepages' && \
bash -c 'echo 0 > /sys/kernel/mm/hugepages/hugepages-2048kB/nr_hugepages'
but : dpdk-testpmd -l 0-3 -n 4 -- -i --nb-cores=2EAL: Detected 48 lcore(s)
EAL: Detected 2 NUMA nodes
EAL: Detected static linkage of DPDK
EAL: Multi-process socket /var/run/dpdk/rte/mp_socket
EAL: Selected IOVA mode 'PA'
EAL: No available hugepages reported in hugepages-2048kB
EAL: Probing VFIO support...
testpmd: No probed ethernet devices
Interactive-mode selected
testpmd: create a new mbuf pool <mb_pool_0>: n=171456, size=2176, socket=0
testpmd: preferred mempool ops selected: ring_mp_mc
Done
So here on this part I really don't understand, my /proc/meminfo tells
me I need to use the 1048576kB part but dpdk-testpmd the 2048kB.
Then I searched an alternative to these commands in your documentation
and found : dpdk-hugpages.py
3 Step alternative
https://doc.dpdk.org/guides-20.11/tools/hugepages.html
(There is an error on the documentation : dpdk-hugpages instead of
dpdk-hugepages)
So I reset every files, and removed my mount and my folder.
umount /mnt/huge
rm -rf /mnt/huge
bash -c 'echo 0 >
/sys/devices/system/node/node0/hugepages/hugepages-1048576kB/nr_hugepages'
bash -c 'echo 0 >
/sys/devices/system/node/node1/hugepages/hugepages-1048576kB/nr_hugepages'
bash -c 'echo 0 > /sys/kernel/mm/hugepages/hugepages-1048576kB/nr_hugepages'
cat /proc/meminfo | grep Huge
AnonHugePages: 10240 kB
ShmemHugePages: 0 kB
FileHugePages: 0 kB
HugePages_Total: 0
HugePages_Free: 0
HugePages_Rsvd: 0
HugePages_Surp: 0
Hugepagesize: 1048576 kB
Hugetlb: 0 kB
dpdk-hugpages.py -s
Node Pages Size Total
Hugepages not mounted
So here I have an cleaned hugepage environment.
Then I tried to reallocate hugepages with the python script:
dpdk-hugepages.py -p 1G --setup 4G
dpdk-hugepages.py -s
Node Pages Size Total
0 4 1Gb 4Gb
1 4 1Gb 4G
So I got my 4 pages of 1GB and retried the previous steps :
cat /proc/meminfo | grep Huge
AnonHugePages: 10240 kB
ShmemHugePages: 0 kB
FileHugePages: 0 kB
HugePages_Total: 8
HugePages_Free: 8
HugePages_Rsvd: 0
HugePages_Surp: 0
Hugepagesize: 1048576 kB
Hugetlb: 8388608 kB
Here it says I got 8 hugepages of 1GB so I don't understand why, because
the python script tells the opposite.
dpdk-testpmd -l 0-3 -n 4 -- -i --nb-cores=2EAL: Detected 48 lcore(s)
EAL: Detected 2 NUMA nodes
EAL: Detected static linkage of DPDK
EAL: Multi-process socket /var/run/dpdk/rte/mp_socket
EAL: Selected IOVA mode 'PA'
EAL: No available hugepages reported in hugepages-2048kB
EAL: Probing VFIO support...
testpmd: No probed ethernet devices
Interactive-mode selected
testpmd: create a new mbuf pool <mb_pool_0>: n=171456, size=2176, socket=0
testpmd: preferred mempool ops selected: ring_mp_mc
Done
Same for the helloworld.
Then I cleared my environment:
dpdk-hugepages.py -u && dpdk-hugepages.py -c && dpdk-hugepages.py -s
Node Pages Size Total
Hugepages not mounted
Then as the error says that there are no available hugepages reported in
hugepages-2048kB i tried with Mb :
dpdk-hugepages.py -p 1024M --setup 4G && dpdk-hugepages.py -s
Node Pages Size Total
0 4 1Gb 4Gb
1 4 1Gb 4Gb
But same error happened.
4 Question
So I don't succeed to resolve this issue of testing the DPDK with
helloworld and dpdk-testpmd.
Have I missed something in the creation of the hugepages ?
Could you please, provide help ?
Best,
--
Gabriel Danjon
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [dpdk-users] Unable to setup hugepages
2021-05-31 15:35 [dpdk-users] Unable to setup hugepages Gabriel Danjon
@ 2021-06-01 7:58 ` Thomas Monjalon
2021-06-02 15:35 ` Gabriel Danjon
0 siblings, 1 reply; 3+ messages in thread
From: Thomas Monjalon @ 2021-06-01 7:58 UTC (permalink / raw)
To: Gabriel Danjon
Cc: users, Alexis DANJON, Antoine LORIN, Laurent CHABENET,
gregory.fresnais, Julien RAMET
31/05/2021 17:35, Gabriel Danjon:
> Hello,
>
> After successfully installed the DPDK 20.11 on my Centos 8-Stream
> (minimal), I am trying to configure the hugepages but encounters a lot
> of difficulties.
There's some confusing info below.
Let's forget all the details and focus on simple things:
1/ use dpdk-hugepages.py
2/ choose one page size (2M or 1G)
3/ check which node requires memory with lstopo
4/ don't be confused with warnings about unused page size
> I am trying to reserve 4 hugepages of 1GB.
>
>
> Here the steps I have done following the documentation
> (https://doc.dpdk.org/guides-20.11/linux_gsg/sys_reqs.html):
>
> Additional information about meminfo :
>
> cat /proc/meminfo
> MemTotal: 32619404 kB
> MemFree: 27331024 kB
> MemAvailable: 27415524 kB
> Buffers: 4220 kB
> Cached: 328628 kB
> SwapCached: 0 kB
> Active: 194828 kB
> Inactive: 210156 kB
> Active(anon): 1744 kB
> Inactive(anon): 83384 kB
> Active(file): 193084 kB
> Inactive(file): 126772 kB
> Unevictable: 0 kB
> Mlocked: 0 kB
> SwapTotal: 16474108 kB
> SwapFree: 16474108 kB
> Dirty: 0 kB
> Writeback: 0 kB
> AnonPages: 72136 kB
> Mapped: 84016 kB
> Shmem: 12992 kB
> KReclaimable: 211956 kB
> Slab: 372852 kB
> SReclaimable: 211956 kB
> SUnreclaim: 160896 kB
> KernelStack: 9120 kB
> PageTables: 6852 kB
> NFS_Unstable: 0 kB
> Bounce: 0 kB
> WritebackTmp: 0 kB
> CommitLimit: 30686656 kB
> Committed_AS: 270424 kB
> VmallocTotal: 34359738367 kB
> VmallocUsed: 0 kB
> VmallocChunk: 0 kB
> Percpu: 28416 kB
> HardwareCorrupted: 0 kB
> AnonHugePages: 10240 kB
> ShmemHugePages: 0 kB
> ShmemPmdMapped: 0 kB
> FileHugePages: 0 kB
> FilePmdMapped: 0 kB
> HugePages_Total: 0
> HugePages_Free: 0
> HugePages_Rsvd: 0
> HugePages_Surp: 0
> Hugepagesize: 1048576 kB
> Hugetlb: 4194304 kB
> DirectMap4k: 225272 kB
> DirectMap2M: 4919296 kB
> DirectMap1G: 30408704 kB
>
> 1 Step follow documentation
>
> bash -c 'echo 2048 > /sys/kernel/mm/hugepages/hugepages-2048kB/nr_hugepages'
>
> As we're working on a NUMA machine we do this too. (We even do the
> previous step because without it, it provides more errors)
>
> bash -c 'echo 2048 >
> /sys/devices/system/node/node0/hugepages/hugepages-2048kB/nr_hugepages' && \
> bash -c 'echo 2048 >
> /sys/devices/system/node/node1/hugepages/hugepages-2048kB/nr_hugepages'
>
> mkdir /mnt/huge
> mount -t hugetlbfs pagesize=1GB /mnt/huge
>
> bash -c 'echo nodev /mnt/huge hugetlbfs pagesize=1GB 0 0 >> /etc/fstab'
>
> So here the result of my meminfo (cat /proc/meminfo | grep Huge) :
>
> AnonHugePages: 10240 kB
> ShmemHugePages: 0 kB
> FileHugePages: 0 kB
> HugePages_Total: 0
> HugePages_Free: 0
> HugePages_Rsvd: 0
> HugePages_Surp: 0
> Hugepagesize: 1048576 kB
> Hugetlb: 4194304 kB
>
> It looks strange that there is no total and free hugepages.
>
> I tried the dpdk-testpmd using the DPDK documentation : dpdk-testpmd -l
> 0-3 -n 4 -- -i --nb-cores=2
>
> EAL: Detected 48 lcore(s)
> EAL: Detected 2 NUMA nodes
> EAL: Detected static linkage of DPDK
> EAL: Multi-process socket /var/run/dpdk/rte/mp_socket
> EAL: Selected IOVA mode 'PA'
> EAL: 2048 hugepages of size 2097152 reserved, but no mounted hugetlbfs
> found for that size
> EAL: No free hugepages reported in hugepages-1048576kB
> EAL: No free hugepages reported in hugepages-1048576kB
> EAL: No available hugepages reported in hugepages-1048576kB
> EAL: FATAL: Cannot get hugepage information.
> EAL: Cannot get hugepage information.
> EAL: Error - exiting with code: 1
> Cause: Cannot init EAL: Permission denied
>
>
> So I checked in the /mnt/huge to look if files had been created (ls
> /mnt/huge/ -la) : Empty folder
>
> Then I checked if my folder was correctly mounted : mount | grep huge
> pagesize=1GB on /mnt/huge type hugetlbfs
> (rw,relatime,seclabel,pagesize=1024M)
>
> Then I tried the helloworld example (make clean && make &&
> ./build/helloworld):
>
> EAL: Detected 48 lcore(s)
> EAL: Detected 2 NUMA nodes
> EAL: Detected shared linkage of DPDK
> EAL: Multi-process socket /var/run/dpdk/rte/mp_socket
> EAL: Selected IOVA mode 'PA'
> EAL: 2048 hugepages of size 2097152 reserved, but no mounted hugetlbfs
> found for that size
> EAL: No free 1048576 kB hugepages reported on node 0
> EAL: No free 1048576 kB hugepages reported on node 1
> EAL: No available 1048576 kB hugepages reported
> EAL: FATAL: Cannot get hugepage information.
> EAL: Cannot get hugepage information.
> PANIC in main():
> Cannot init EAL
> 5: [./build/helloworld() [0x40079e]]
> 4: [/lib64/libc.so.6(__libc_start_main+0xf3) [0x7ff43a6f6493]]
> 3: [./build/helloworld() [0x4006e6]]
> 2: [/usr/local/lib64/librte_eal.so.21(__rte_panic+0xba) [0x7ff43aaa4b93]]
> 1: [/usr/local/lib64/librte_eal.so.21(rte_dump_stack+0x1b) [0x7ff43aac79fb]]
> Aborted (core dumped)
>
>
> So I guessed the problem came from the : Hugepagesize: 1048576 kB
> (from cat /proc/meminfo | grep Huge).
>
>
> 2 Step adapt documentation
>
> Then I decided to set the values for 1048576KB:
>
> bash -c 'echo 4 >
> /sys/devices/system/node/node0/hugepages/hugepages-1048576kB/nr_hugepages'
> bash -c 'echo 4 >
> /sys/devices/system/node/node1/hugepages/hugepages-1048576kB/nr_hugepages'
> bash -c 'echo 4 > /sys/kernel/mm/hugepages/hugepages-1048576kB/nr_hugepages'
>
>
> So here the result of my meminfo (cat /proc/meminfo | grep Huge) :
>
> AnonHugePages: 10240 kB
> ShmemHugePages: 0 kB
> FileHugePages: 0 kB
> HugePages_Total: 4
> HugePages_Free: 4
> HugePages_Rsvd: 0
> HugePages_Surp: 0
> Hugepagesize: 1048576 kB
> Hugetlb: 8388608 kB
>
> So here I have my 4 pages sat.
>
> Then I retried the previous steps and here what I got :
>
> dpdk-testpmd -l 0-3 -n 4 -- -i --nb-cores=2
> EAL: Detected 48 lcore(s)
> EAL: Detected 2 NUMA nodes
> EAL: Detected static linkage of DPDK
> EAL: Multi-process socket /var/run/dpdk/rte/mp_socket
> EAL: Selected IOVA mode 'PA'
> EAL: 2048 hugepages of size 2097152 reserved, but no mounted hugetlbfs
> found for that size
> EAL: Probing VFIO support...
> testpmd: No probed ethernet devices
> Interactive-mode selected
> testpmd: create a new mbuf pool <mb_pool_0>: n=171456, size=2176, socket=0
> testpmd: preferred mempool ops selected: ring_mp_mc
> Done
> testpmd>
> Bye...
>
>
> make clean && make && ./build/helloworld
> EAL: Detected 48 lcore(s)
> EAL: Detected 2 NUMA nodes
> EAL: Detected shared linkage of DPDK
> EAL: Multi-process socket /var/run/dpdk/rte/mp_socket
> EAL: Selected IOVA mode 'PA'
> EAL: 2048 hugepages of size 2097152 reserved, but no mounted hugetlbfs
> found for that size
> TELEMETRY: No legacy callbacks, legacy socket not created
>
>
> cat /proc/meminfo | grep Huge
> AnonHugePages: 10240 kB
> ShmemHugePages: 0 kB
> FileHugePages: 0 kB
> HugePages_Total: 4
> HugePages_Free: 3
> HugePages_Rsvd: 0
> HugePages_Surp: 0
> Hugepagesize: 1048576 kB
> Hugetlb: 8388608 kB
>
> One huge page looks like have been used.
> ls -l /mnt/huge/
> total 1048576
> 1073741824 rtemap_0
>
> So yes one has been created, but 2048 hugepages of size 2097152
> reserved, but no mounted hugetlbfs found for that size, happens.
>
> So to try to understand what happens I reset
> hugepages-2048kB/nr_hugepages to 0 :
> bash -c 'echo 0 >
> /sys/devices/system/node/node0/hugepages/hugepages-2048kB/nr_hugepages' && \
> bash -c 'echo 0 >
> /sys/devices/system/node/node1/hugepages/hugepages-2048kB/nr_hugepages' && \
> bash -c 'echo 0 > /sys/kernel/mm/hugepages/hugepages-2048kB/nr_hugepages'
>
> but : dpdk-testpmd -l 0-3 -n 4 -- -i --nb-cores=2EAL: Detected 48 lcore(s)
> EAL: Detected 2 NUMA nodes
> EAL: Detected static linkage of DPDK
> EAL: Multi-process socket /var/run/dpdk/rte/mp_socket
> EAL: Selected IOVA mode 'PA'
> EAL: No available hugepages reported in hugepages-2048kB
> EAL: Probing VFIO support...
> testpmd: No probed ethernet devices
> Interactive-mode selected
> testpmd: create a new mbuf pool <mb_pool_0>: n=171456, size=2176, socket=0
> testpmd: preferred mempool ops selected: ring_mp_mc
> Done
>
> So here on this part I really don't understand, my /proc/meminfo tells
> me I need to use the 1048576kB part but dpdk-testpmd the 2048kB.
>
> Then I searched an alternative to these commands in your documentation
> and found : dpdk-hugpages.py
>
>
> 3 Step alternative
>
> https://doc.dpdk.org/guides-20.11/tools/hugepages.html
> (There is an error on the documentation : dpdk-hugpages instead of
> dpdk-hugepages)
>
> So I reset every files, and removed my mount and my folder.
>
> umount /mnt/huge
> rm -rf /mnt/huge
> bash -c 'echo 0 >
> /sys/devices/system/node/node0/hugepages/hugepages-1048576kB/nr_hugepages'
> bash -c 'echo 0 >
> /sys/devices/system/node/node1/hugepages/hugepages-1048576kB/nr_hugepages'
> bash -c 'echo 0 > /sys/kernel/mm/hugepages/hugepages-1048576kB/nr_hugepages'
>
> cat /proc/meminfo | grep Huge
> AnonHugePages: 10240 kB
> ShmemHugePages: 0 kB
> FileHugePages: 0 kB
> HugePages_Total: 0
> HugePages_Free: 0
> HugePages_Rsvd: 0
> HugePages_Surp: 0
> Hugepagesize: 1048576 kB
> Hugetlb: 0 kB
>
>
> dpdk-hugpages.py -s
>
> Node Pages Size Total
>
> Hugepages not mounted
>
>
> So here I have an cleaned hugepage environment.
> Then I tried to reallocate hugepages with the python script:
> dpdk-hugepages.py -p 1G --setup 4G
>
> dpdk-hugepages.py -s
> Node Pages Size Total
> 0 4 1Gb 4Gb
> 1 4 1Gb 4G
>
>
> So I got my 4 pages of 1GB and retried the previous steps :
>
> cat /proc/meminfo | grep Huge
> AnonHugePages: 10240 kB
> ShmemHugePages: 0 kB
> FileHugePages: 0 kB
> HugePages_Total: 8
> HugePages_Free: 8
> HugePages_Rsvd: 0
> HugePages_Surp: 0
> Hugepagesize: 1048576 kB
> Hugetlb: 8388608 kB
>
> Here it says I got 8 hugepages of 1GB so I don't understand why, because
> the python script tells the opposite.
>
> dpdk-testpmd -l 0-3 -n 4 -- -i --nb-cores=2EAL: Detected 48 lcore(s)
> EAL: Detected 2 NUMA nodes
> EAL: Detected static linkage of DPDK
> EAL: Multi-process socket /var/run/dpdk/rte/mp_socket
> EAL: Selected IOVA mode 'PA'
> EAL: No available hugepages reported in hugepages-2048kB
> EAL: Probing VFIO support...
> testpmd: No probed ethernet devices
> Interactive-mode selected
> testpmd: create a new mbuf pool <mb_pool_0>: n=171456, size=2176, socket=0
> testpmd: preferred mempool ops selected: ring_mp_mc
> Done
>
> Same for the helloworld.
>
> Then I cleared my environment:
>
> dpdk-hugepages.py -u && dpdk-hugepages.py -c && dpdk-hugepages.py -s
> Node Pages Size Total
>
> Hugepages not mounted
>
>
> Then as the error says that there are no available hugepages reported in
> hugepages-2048kB i tried with Mb :
> dpdk-hugepages.py -p 1024M --setup 4G && dpdk-hugepages.py -s
> Node Pages Size Total
> 0 4 1Gb 4Gb
> 1 4 1Gb 4Gb
>
> But same error happened.
>
>
> 4 Question
>
> So I don't succeed to resolve this issue of testing the DPDK with
> helloworld and dpdk-testpmd.
>
> Have I missed something in the creation of the hugepages ?
>
> Could you please, provide help ?
>
> Best,
>
>
>
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [dpdk-users] Unable to setup hugepages
2021-06-01 7:58 ` Thomas Monjalon
@ 2021-06-02 15:35 ` Gabriel Danjon
0 siblings, 0 replies; 3+ messages in thread
From: Gabriel Danjon @ 2021-06-02 15:35 UTC (permalink / raw)
To: Thomas Monjalon
Cc: users, Alexis DANJON, Antoine LORIN, Laurent CHABENET,
gregory.fresnais, Julien RAMET
Hello,
After looking at the hugepage_info_init function from
dpdk-20.11/lib/librte_eal/linux/eal_hugepage_info.c we finally
understood why we could skip the warning.
Thanks to your help, we manage to generate traffic using the testpmd.
Gabriel Danjon
Cyber Test Systems
On 6/1/21 9:58 AM, Thomas Monjalon wrote:
> 31/05/2021 17:35, Gabriel Danjon:
>> Hello,
>>
>> After successfully installed the DPDK 20.11 on my Centos 8-Stream
>> (minimal), I am trying to configure the hugepages but encounters a lot
>> of difficulties.
> There's some confusing info below.
> Let's forget all the details and focus on simple things:
> 1/ use dpdk-hugepages.py
> 2/ choose one page size (2M or 1G)
> 3/ check which node requires memory with lstopo
> 4/ don't be confused with warnings about unused page size
>
>
>
>> I am trying to reserve 4 hugepages of 1GB.
>>
>>
>> Here the steps I have done following the documentation
>> (https://doc.dpdk.org/guides-20.11/linux_gsg/sys_reqs.html):
>>
>> Additional information about meminfo :
>>
>> cat /proc/meminfo
>> MemTotal: 32619404 kB
>> MemFree: 27331024 kB
>> MemAvailable: 27415524 kB
>> Buffers: 4220 kB
>> Cached: 328628 kB
>> SwapCached: 0 kB
>> Active: 194828 kB
>> Inactive: 210156 kB
>> Active(anon): 1744 kB
>> Inactive(anon): 83384 kB
>> Active(file): 193084 kB
>> Inactive(file): 126772 kB
>> Unevictable: 0 kB
>> Mlocked: 0 kB
>> SwapTotal: 16474108 kB
>> SwapFree: 16474108 kB
>> Dirty: 0 kB
>> Writeback: 0 kB
>> AnonPages: 72136 kB
>> Mapped: 84016 kB
>> Shmem: 12992 kB
>> KReclaimable: 211956 kB
>> Slab: 372852 kB
>> SReclaimable: 211956 kB
>> SUnreclaim: 160896 kB
>> KernelStack: 9120 kB
>> PageTables: 6852 kB
>> NFS_Unstable: 0 kB
>> Bounce: 0 kB
>> WritebackTmp: 0 kB
>> CommitLimit: 30686656 kB
>> Committed_AS: 270424 kB
>> VmallocTotal: 34359738367 kB
>> VmallocUsed: 0 kB
>> VmallocChunk: 0 kB
>> Percpu: 28416 kB
>> HardwareCorrupted: 0 kB
>> AnonHugePages: 10240 kB
>> ShmemHugePages: 0 kB
>> ShmemPmdMapped: 0 kB
>> FileHugePages: 0 kB
>> FilePmdMapped: 0 kB
>> HugePages_Total: 0
>> HugePages_Free: 0
>> HugePages_Rsvd: 0
>> HugePages_Surp: 0
>> Hugepagesize: 1048576 kB
>> Hugetlb: 4194304 kB
>> DirectMap4k: 225272 kB
>> DirectMap2M: 4919296 kB
>> DirectMap1G: 30408704 kB
>>
>> 1 Step follow documentation
>>
>> bash -c 'echo 2048 > /sys/kernel/mm/hugepages/hugepages-2048kB/nr_hugepages'
>>
>> As we're working on a NUMA machine we do this too. (We even do the
>> previous step because without it, it provides more errors)
>>
>> bash -c 'echo 2048 >
>> /sys/devices/system/node/node0/hugepages/hugepages-2048kB/nr_hugepages' && \
>> bash -c 'echo 2048 >
>> /sys/devices/system/node/node1/hugepages/hugepages-2048kB/nr_hugepages'
>>
>> mkdir /mnt/huge
>> mount -t hugetlbfs pagesize=1GB /mnt/huge
>>
>> bash -c 'echo nodev /mnt/huge hugetlbfs pagesize=1GB 0 0 >> /etc/fstab'
>>
>> So here the result of my meminfo (cat /proc/meminfo | grep Huge) :
>>
>> AnonHugePages: 10240 kB
>> ShmemHugePages: 0 kB
>> FileHugePages: 0 kB
>> HugePages_Total: 0
>> HugePages_Free: 0
>> HugePages_Rsvd: 0
>> HugePages_Surp: 0
>> Hugepagesize: 1048576 kB
>> Hugetlb: 4194304 kB
>>
>> It looks strange that there is no total and free hugepages.
>>
>> I tried the dpdk-testpmd using the DPDK documentation : dpdk-testpmd -l
>> 0-3 -n 4 -- -i --nb-cores=2
>>
>> EAL: Detected 48 lcore(s)
>> EAL: Detected 2 NUMA nodes
>> EAL: Detected static linkage of DPDK
>> EAL: Multi-process socket /var/run/dpdk/rte/mp_socket
>> EAL: Selected IOVA mode 'PA'
>> EAL: 2048 hugepages of size 2097152 reserved, but no mounted hugetlbfs
>> found for that size
>> EAL: No free hugepages reported in hugepages-1048576kB
>> EAL: No free hugepages reported in hugepages-1048576kB
>> EAL: No available hugepages reported in hugepages-1048576kB
>> EAL: FATAL: Cannot get hugepage information.
>> EAL: Cannot get hugepage information.
>> EAL: Error - exiting with code: 1
>> Cause: Cannot init EAL: Permission denied
>>
>>
>> So I checked in the /mnt/huge to look if files had been created (ls
>> /mnt/huge/ -la) : Empty folder
>>
>> Then I checked if my folder was correctly mounted : mount | grep huge
>> pagesize=1GB on /mnt/huge type hugetlbfs
>> (rw,relatime,seclabel,pagesize=1024M)
>>
>> Then I tried the helloworld example (make clean && make &&
>> ./build/helloworld):
>>
>> EAL: Detected 48 lcore(s)
>> EAL: Detected 2 NUMA nodes
>> EAL: Detected shared linkage of DPDK
>> EAL: Multi-process socket /var/run/dpdk/rte/mp_socket
>> EAL: Selected IOVA mode 'PA'
>> EAL: 2048 hugepages of size 2097152 reserved, but no mounted hugetlbfs
>> found for that size
>> EAL: No free 1048576 kB hugepages reported on node 0
>> EAL: No free 1048576 kB hugepages reported on node 1
>> EAL: No available 1048576 kB hugepages reported
>> EAL: FATAL: Cannot get hugepage information.
>> EAL: Cannot get hugepage information.
>> PANIC in main():
>> Cannot init EAL
>> 5: [./build/helloworld() [0x40079e]]
>> 4: [/lib64/libc.so.6(__libc_start_main+0xf3) [0x7ff43a6f6493]]
>> 3: [./build/helloworld() [0x4006e6]]
>> 2: [/usr/local/lib64/librte_eal.so.21(__rte_panic+0xba) [0x7ff43aaa4b93]]
>> 1: [/usr/local/lib64/librte_eal.so.21(rte_dump_stack+0x1b) [0x7ff43aac79fb]]
>> Aborted (core dumped)
>>
>>
>> So I guessed the problem came from the : Hugepagesize: 1048576 kB
>> (from cat /proc/meminfo | grep Huge).
>>
>>
>> 2 Step adapt documentation
>>
>> Then I decided to set the values for 1048576KB:
>>
>> bash -c 'echo 4 >
>> /sys/devices/system/node/node0/hugepages/hugepages-1048576kB/nr_hugepages'
>> bash -c 'echo 4 >
>> /sys/devices/system/node/node1/hugepages/hugepages-1048576kB/nr_hugepages'
>> bash -c 'echo 4 > /sys/kernel/mm/hugepages/hugepages-1048576kB/nr_hugepages'
>>
>>
>> So here the result of my meminfo (cat /proc/meminfo | grep Huge) :
>>
>> AnonHugePages: 10240 kB
>> ShmemHugePages: 0 kB
>> FileHugePages: 0 kB
>> HugePages_Total: 4
>> HugePages_Free: 4
>> HugePages_Rsvd: 0
>> HugePages_Surp: 0
>> Hugepagesize: 1048576 kB
>> Hugetlb: 8388608 kB
>>
>> So here I have my 4 pages sat.
>>
>> Then I retried the previous steps and here what I got :
>>
>> dpdk-testpmd -l 0-3 -n 4 -- -i --nb-cores=2
>> EAL: Detected 48 lcore(s)
>> EAL: Detected 2 NUMA nodes
>> EAL: Detected static linkage of DPDK
>> EAL: Multi-process socket /var/run/dpdk/rte/mp_socket
>> EAL: Selected IOVA mode 'PA'
>> EAL: 2048 hugepages of size 2097152 reserved, but no mounted hugetlbfs
>> found for that size
>> EAL: Probing VFIO support...
>> testpmd: No probed ethernet devices
>> Interactive-mode selected
>> testpmd: create a new mbuf pool <mb_pool_0>: n=171456, size=2176, socket=0
>> testpmd: preferred mempool ops selected: ring_mp_mc
>> Done
>> testpmd>
>> Bye...
>>
>>
>> make clean && make && ./build/helloworld
>> EAL: Detected 48 lcore(s)
>> EAL: Detected 2 NUMA nodes
>> EAL: Detected shared linkage of DPDK
>> EAL: Multi-process socket /var/run/dpdk/rte/mp_socket
>> EAL: Selected IOVA mode 'PA'
>> EAL: 2048 hugepages of size 2097152 reserved, but no mounted hugetlbfs
>> found for that size
>> TELEMETRY: No legacy callbacks, legacy socket not created
>>
>>
>> cat /proc/meminfo | grep Huge
>> AnonHugePages: 10240 kB
>> ShmemHugePages: 0 kB
>> FileHugePages: 0 kB
>> HugePages_Total: 4
>> HugePages_Free: 3
>> HugePages_Rsvd: 0
>> HugePages_Surp: 0
>> Hugepagesize: 1048576 kB
>> Hugetlb: 8388608 kB
>>
>> One huge page looks like have been used.
>> ls -l /mnt/huge/
>> total 1048576
>> 1073741824 rtemap_0
>>
>> So yes one has been created, but 2048 hugepages of size 2097152
>> reserved, but no mounted hugetlbfs found for that size, happens.
>>
>> So to try to understand what happens I reset
>> hugepages-2048kB/nr_hugepages to 0 :
>> bash -c 'echo 0 >
>> /sys/devices/system/node/node0/hugepages/hugepages-2048kB/nr_hugepages' && \
>> bash -c 'echo 0 >
>> /sys/devices/system/node/node1/hugepages/hugepages-2048kB/nr_hugepages' && \
>> bash -c 'echo 0 > /sys/kernel/mm/hugepages/hugepages-2048kB/nr_hugepages'
>>
>> but : dpdk-testpmd -l 0-3 -n 4 -- -i --nb-cores=2EAL: Detected 48 lcore(s)
>> EAL: Detected 2 NUMA nodes
>> EAL: Detected static linkage of DPDK
>> EAL: Multi-process socket /var/run/dpdk/rte/mp_socket
>> EAL: Selected IOVA mode 'PA'
>> EAL: No available hugepages reported in hugepages-2048kB
>> EAL: Probing VFIO support...
>> testpmd: No probed ethernet devices
>> Interactive-mode selected
>> testpmd: create a new mbuf pool <mb_pool_0>: n=171456, size=2176, socket=0
>> testpmd: preferred mempool ops selected: ring_mp_mc
>> Done
>>
>> So here on this part I really don't understand, my /proc/meminfo tells
>> me I need to use the 1048576kB part but dpdk-testpmd the 2048kB.
>>
>> Then I searched an alternative to these commands in your documentation
>> and found : dpdk-hugpages.py
>>
>>
>> 3 Step alternative
>>
>> https://doc.dpdk.org/guides-20.11/tools/hugepages.html
>> (There is an error on the documentation : dpdk-hugpages instead of
>> dpdk-hugepages)
>>
>> So I reset every files, and removed my mount and my folder.
>>
>> umount /mnt/huge
>> rm -rf /mnt/huge
>> bash -c 'echo 0 >
>> /sys/devices/system/node/node0/hugepages/hugepages-1048576kB/nr_hugepages'
>> bash -c 'echo 0 >
>> /sys/devices/system/node/node1/hugepages/hugepages-1048576kB/nr_hugepages'
>> bash -c 'echo 0 > /sys/kernel/mm/hugepages/hugepages-1048576kB/nr_hugepages'
>>
>> cat /proc/meminfo | grep Huge
>> AnonHugePages: 10240 kB
>> ShmemHugePages: 0 kB
>> FileHugePages: 0 kB
>> HugePages_Total: 0
>> HugePages_Free: 0
>> HugePages_Rsvd: 0
>> HugePages_Surp: 0
>> Hugepagesize: 1048576 kB
>> Hugetlb: 0 kB
>>
>>
>> dpdk-hugpages.py -s
>>
>> Node Pages Size Total
>>
>> Hugepages not mounted
>>
>>
>> So here I have an cleaned hugepage environment.
>> Then I tried to reallocate hugepages with the python script:
>> dpdk-hugepages.py -p 1G --setup 4G
>>
>> dpdk-hugepages.py -s
>> Node Pages Size Total
>> 0 4 1Gb 4Gb
>> 1 4 1Gb 4G
>>
>>
>> So I got my 4 pages of 1GB and retried the previous steps :
>>
>> cat /proc/meminfo | grep Huge
>> AnonHugePages: 10240 kB
>> ShmemHugePages: 0 kB
>> FileHugePages: 0 kB
>> HugePages_Total: 8
>> HugePages_Free: 8
>> HugePages_Rsvd: 0
>> HugePages_Surp: 0
>> Hugepagesize: 1048576 kB
>> Hugetlb: 8388608 kB
>>
>> Here it says I got 8 hugepages of 1GB so I don't understand why, because
>> the python script tells the opposite.
>>
>> dpdk-testpmd -l 0-3 -n 4 -- -i --nb-cores=2EAL: Detected 48 lcore(s)
>> EAL: Detected 2 NUMA nodes
>> EAL: Detected static linkage of DPDK
>> EAL: Multi-process socket /var/run/dpdk/rte/mp_socket
>> EAL: Selected IOVA mode 'PA'
>> EAL: No available hugepages reported in hugepages-2048kB
>> EAL: Probing VFIO support...
>> testpmd: No probed ethernet devices
>> Interactive-mode selected
>> testpmd: create a new mbuf pool <mb_pool_0>: n=171456, size=2176, socket=0
>> testpmd: preferred mempool ops selected: ring_mp_mc
>> Done
>>
>> Same for the helloworld.
>>
>> Then I cleared my environment:
>>
>> dpdk-hugepages.py -u && dpdk-hugepages.py -c && dpdk-hugepages.py -s
>> Node Pages Size Total
>>
>> Hugepages not mounted
>>
>>
>> Then as the error says that there are no available hugepages reported in
>> hugepages-2048kB i tried with Mb :
>> dpdk-hugepages.py -p 1024M --setup 4G && dpdk-hugepages.py -s
>> Node Pages Size Total
>> 0 4 1Gb 4Gb
>> 1 4 1Gb 4Gb
>>
>> But same error happened.
>>
>>
>> 4 Question
>>
>> So I don't succeed to resolve this issue of testing the DPDK with
>> helloworld and dpdk-testpmd.
>>
>> Have I missed something in the creation of the hugepages ?
>>
>> Could you please, provide help ?
>>
>> Best,
>>
>>
>>
>
>
>
^ permalink raw reply [flat|nested] 3+ messages in thread
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2021-05-31 15:35 [dpdk-users] Unable to setup hugepages Gabriel Danjon
2021-06-01 7:58 ` Thomas Monjalon
2021-06-02 15:35 ` Gabriel Danjon
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