Ubuntu

libblas3gf crash caused by AMD prefetchw instruction on Intel CPU

Reported by Davy Zhu on 2013-04-19
6
This bug affects 1 person
Affects Status Importance Assigned to Milestone
blas (Ubuntu)
Undecided
Unassigned

Bug Description

Hi, I run Python3.2/Numpy/Scipy on Ubuntu 12.04, I call spsolve(sparse solver), and libblas crashed python. The reason is libblas invoke an AMD only instruction prefetchw.

Backtrace:
Program terminated with signal 4, Illegal instruction.
#0 0x00007f6f079fe304 in ATL_dupKBmm9_1_1_b1 () from /usr/lib/libblas.so.3gf
(gdb) bt
#0 0x00007f6f079fe304 in ATL_dupKBmm9_1_1_b1 () from /usr/lib/libblas.so.3gf
#1 0x00007f6f0799abbc in ATL_dmmIJK2 () from /usr/lib/libblas.so.3gf
#2 0x00007f6f0799b331 in ATL_dmmIJK () from /usr/lib/libblas.so.3gf
#3 0x00007f6f07988c6b in ATL_dgemm () from /usr/lib/libblas.so.3gf
#4 0x00007f6f079a375d in ATL_dptgemm0 () from /usr/lib/libblas.so.3gf
#5 0x00007f6f0b553e9a in start_thread (arg=0x7f6f03132700)
    at pthread_create.c:308
#6 0x00007f6f0a116cbd in clone ()
    at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
#7 0x0000000000000000 in ?? ()

(gdb) x/i $pc
=> 0x7f6f079fe304 <ATL_dupKBmm9_1_1_b1+164>: prefetchw (%rsi)

My enviroment: Intel P4 cpu, x86_64, Ubuntu 12.04

Davy Zhu (zhushenli) wrote :
Davy Zhu (zhushenli) wrote :

Pickle file to recreate bug.

Davy Zhu (zhushenli) wrote :

Pickle file to recreate bug.

Changed in blas:
status: Unknown → Invalid
Davy Zhu (zhushenli) on 2013-04-19
no longer affects: blas
Pauli Virtanen (pauli-virtanen) wrote :

@Davy Zhu: list `dpkg --list|grep -i libatlas` and check that `readlink -f /usr/lib/libblas.so.3gf` points to an Ubuntu-provided BLAS.

Pauli Virtanen (pauli-virtanen) wrote :

The `libatlas3gf-base_3.8.4-3build1_amd64.deb` package in Precise does contain 3DNow! instructions:

$ objdump -d libblas.so.3gf | grep -c prefetchw
348

Davy Zhu (zhushenli) wrote :

$ dpkg --list|grep -i libatlas
ii libatlas-base-dev 3.8.4-3build1
ii libatlas-dev 3.8.4-3build1
ii libatlas3gf-base 3.8.4-3build1

$ readlink -f /usr/lib/libblas.so.3gf
/usr/lib/atlas-base/atlas/libblas.so.3gf.0

To post a comment you must log in.
This report contains Public information  Edit
Everyone can see this information.

Other bug subscribers

Remote bug watches

Bug watches keep track of this bug in other bug trackers.