Hi Gael, thanks for your reply, I will try to reproduce a example but it's difficult.
as for your question:
1. it seems crash for matrix size bigger than about 100*100.
2. my program is multi-threaded.
3. the eigen version is 3.2.4, eigen-eigen-10219c95fe65, maybe I should try the latest stable release.
4. I don't think I can try it with valgrind, because the system has only 512MB memory, even running a gdb is not that easy.
Thank you again.
--
Best Regards!
--
extr15
At 2017-07-25 16:44:43, "Gael Guennebaud" <gael.guennebaud@xxxxxxxxx> wrote:
Hi,
since you cannot reproduce with a self-contained example this is gonna be difficult to fix. Some question to help isolate the issue:
1 - Does it crash for any problem size or for specific sizes only?
2 - Is your program multi-threaded?
3 - What is your exact version of Eigen? (lines are not matching the latest 3.3.4 stable release)
4 - You could try to run it within a memory debugger like valgrind.
Gael
On Thu, Jul 20, 2017 at 6:09 PM, extr15 <extr15@xxxxxxx> wrote:
Hello, it seems I can't log in "http://eigen.tuxfamily.org/bz/?GoAheadAndLogIn=1"; as I am a new user, so I write this mail to ask for your help, thanks!
I have a project which runs OK on my 64bit laptop( ubuntu), but when I run this program on a 32 bit linux platform, it will crash with the output:
"
*** Aborted at 2926 (unix time) try "date -d @2926" if you are using GNU date ***
PC: @ 0x206384 Eigen::internal::gemm_pack_rhs<>::operator()()
segment fault
"
I use gdb to debug, and the "bt" output:
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Program received signal SIGSEGV, Segmentation fault.
[Switching to LWP 1138]
0x0020b65c in Eigen::internal::gemm_pack_rhs<double, int, 2, 0, false, false>::operator() (blockB=0xb6e3dc00, rhs=rhs@entry=0x1cda940, rhsStride=1071644672,
rhsStride@entry=106, depth=depth@entry=106, cols=106,
this=<optimized out>, offset=0, stride=0)
at eigen3/Eigen/src/Core/products/GeneralBlockPanelKernel.h:1236
1236eigen3/Eigen/src/Core/products/GeneralBlockPanelKernel.h: No such file or directory.
(gdb) #0 0x0020b65c in Eigen::internal::gemm_pack_rhs<double, int, 2, 0, false, false>::operator() (blockB=0xb6e3dc00, rhs=rhs@entry=0x1cda940,
rhsStride=1071644672, rhsStride@entry=106, depth=depth@entry=106,
cols=106, this=<optimized out>, offset=0, stride=0)
at eigen3/Eigen/src/Core/products/GeneralBlockPanelKernel.h:1236
#1 0x00212664 in Eigen::internal::general_matrix_matrix_product<int, double, 0, false, double, 0, false, 0>::run (rows=3, cols=<optimized out>,
depth=<optimized out>, _lhs=<optimized out>, lhsStride=3, _rhs=0x1cda940,
rhsStride=106, res=0x1e39ac0, resStride=3, alpha=1, blocking=..., info=0x0)
at eigen3/Eigen/src/Core/products/GeneralMatrixMatrix.h:171
#2 0x0021cacc in Eigen::internal::gemm_functor<double, int, Eigen::internal::general_matrix_matrix_product<int, double, 0, false, double, 0, false, 0>, Eigen::Matrix<double, -1, -1, 0, -1, -1>, Eigen::Matrix<double, -1, -1, 0, -1, -1>, Eigen::Matrix<double, -1, -1, 0, -1, -1>, Eigen::internal::gemm_blocking_space<0, double, double, -1, -1, -1, 1, false> >::operator() (info=0x0,
cols=<optimized out>, col=0, rows=<optimized out>, row=0,
this=<optimized out>)
at eigen3/Eigen/src/Core/products/GeneralMatrixMatrix.h:221
#3 Eigen::internal::parallelize_gemm<true, Eigen::internal::gemm_functor<double, int, Eigen::internal::general_matrix_matrix_product<int, double, 0, false, dou---Type <return> to continue, or q <return> to quit---ble, 0, false, 0>, Eigen::Matrix<double, -1, -1, 0, -1, -1>, Eigen::Matrix<double, -1, -1, 0, -1, -1>, Eigen::Matrix<double, -1, -1, 0, -1, -1>, Eigen::internal::gemm_blocking_space<0, double, double, -1, -1, -1, 1, false> >, int> (
transpose=false, cols=<optimized out>, rows=<optimized out>, func=...)
at eigen3/Eigen/src/Core/products/Parallelizer.h:96
#4 Eigen::GeneralProduct<Eigen::Matrix<double, -1, -1, 0, -1, -1>, Eigen::Matrix<double, -1, -1, 0, -1, -1>, 5>::scaleAndAddTo<Eigen::Matrix<double, -1, -1, 0, -1, -1> > (alpha=<optimized out>, dst=..., this=0xb6e546a4)
at eigen3/Eigen/src/Core/products/GeneralMatrixMatrix.h:421
#5 Eigen::ProductBase<Eigen::GeneralProduct<Eigen::Matrix<double, -1, -1, 0, -1, -1>, Eigen::Matrix<double, -1, -1, 0, -1, -1>, 5>, Eigen::Matrix<double, -1, -1, 0, -1, -1>, Eigen::Matrix<double, -1, -1, 0, -1, -1> >::scaleAndAddTo<Eigen::Matrix<double, -1, -1, 0, -1, -1> > (alpha=<optimized out>, dst=...,
this=0xb6e546a4)
at eigen3/Eigen/src/Core/ProductBase.h:118
#6 Eigen::ProductBase<Eigen::GeneralProduct<Eigen::Matrix<double, -1, -1, 0, -1, -1>, Eigen::Matrix<double, -1, -1, 0, -1, -1>, 5>, Eigen::Matrix<double, -1, -1, 0, -1, -1>, Eigen::Matrix<double, -1, -1, 0, -1, -1> >::evalTo<Eigen::Matrix<double, -1, -1, 0, -1, -1> > (dst=..., this=0xb6e546a4)
at eigen3/---Type <return> to continue, or q <return> to quit---Eigen/src/Core/ProductBase.h:109
#7 Eigen::ProductBase<Eigen::GeneralProduct<Eigen::Matrix<double, -1, -1, 0, -1, -1>, Eigen::Matrix<double, -1, -1, 0, -1, -1>, 5>, Eigen::Matrix<double, -1, -1, 0, -1, -1>, Eigen::Matrix<double, -1, -1, 0, -1, -1> >::operator Eigen::Matrix<double, -1, -1, 0, -1, -1> const& (this=0xb6e546a4)
at eigen3/Eigen/src/Core/ProductBase.h:127
#8 Eigen::ProductBase<Eigen::GeneralProduct<Eigen::GeneralProduct<Eigen::Matrix<double, -1, -1, 0, -1, -1>, Eigen::Matrix<double, -1, -1, 0, -1, -1>, 5>, Eigen::Transpose<Eigen::Matrix<double, -1, -1, 0, -1, -1> const>, 5>, Eigen::GeneralProduct<Eigen::Matrix<double, -1, -1, 0, -1, -1>, Eigen::Matrix<double, -1, -1, 0, -1, -1>, 5>, Eigen::Transpose<Eigen::Matrix<double, -1, -1, 0, -1, -1> const> >::ProductBase (a_rhs=..., a_lhs=..., this=<optimized out>)
at eigen3/Eigen/src/Core/ProductBase.h:98
#9 Eigen::GeneralProduct<Eigen::GeneralProduct<Eigen::Matrix<double, -1, -1, 0, -1, -1>, Eigen::Matrix<double, -1, -1, 0, -1, -1>, 5>, Eigen::Transpose<Eigen::Matrix<double, -1, -1, 0, -1, -1> const>, 5>::GeneralProduct (rhs=...,
lhs=..., this=<optimized out>)
at eigen3/Eigen/src/Core/products/GeneralMatrixMatrix.h:391
#10 Eigen::MatrixBase<Eigen::GeneralProduct<Eigen::Matrix<double, -1, -1, 0, -1, -1>, Eigen::Matrix<double, -1, -1, 0, -1, -1>, 5> >::operator*<Eigen::Transpose---Type <return> to continue, or q <return> to quit---<Eigen::Matrix<double, -1, -1, 0, -1, -1> const> > (other=..., this=0xb6e546a4)
at eigen3/Eigen/src/Core/GeneralProduct.h:595
-----------------------------------------------------------------------------------------------------------------------------------------------------------------
and I find this is called by a matrix multiplication like:
" MatrixXd cov2= H.transpose() * cov * H;"
when I comment out this line and the segment fault will gone.
also, if I use opencv's matrix multiplication here and no segment fault will happen, so I think it's a bug of eigen.
the rows of H may be 6~200, and the cols of H is 3. I write a simple code to test but no segment fault happen, here's my simple code:
"
MatrixXd H(2*num, 3);
MatrixXd cov = MatrixXd::Zero(2*num, 2*num);
H = MatrixXd::Random(2*num, 3);
cov = MatrixXd::Random(2*num, 2*num);
cout<<"H"<<endl<<H<<endl;
cout<<"cov"<<endl<<cov<<endl;
MatrixXd cov2= H.transpose() * cov * H;
cout<<cov2<<endl;
"
I have tried to use gdb to debug, but no more info I can get.
Could you please have a look or tell me how to debug this problem? thanks!
some info about my platform:
uname -a
Linux 3.4.39 #375 SMP PREEMPT Mon Jul 17 09:07:31 UTC 2017 armv7l GNU/Linux
free
total used free shared buff/cache available
Mem: 524288 21000 270188 1372 233100 491107
Swap: 0 0 0
df -h
Filesystem Size Used Available Use% Mounted on
rootfs 5.0M 528.0K 4.5M 10% /
/dev/root 5.8M 5.8M 0 100% /rom
tmpfs 250.9M 1.3M 249.5M 1% /tmp
/dev/mtdblock5 5.0M 528.0K 4.5M 10% /overlay
overlayfs:/overlay 5.0M 528.0K 4.5M 10% /
tmpfs 512.0K 0 512.0K 0% /dev
/dev/mmcblk0p1 7.4G 3.1G 4.3G 42% /mnt/SDCARD
/dev/by-name/UDISK 1.1M 196.0K 892.0K 18% /mnt/UDISK
/dev/by-name/boot 2.0M 1.7M 322.0K 84% /boot
/dev/by-name/boot-res
8.0M 39.0K 7.9M 0% /boot-res
Thanks again!
--
Best Regards!
--
extr15