| commit | bde4765b956d0f11d27e3a1603dd6e0b19f63183 | |
| author | Nikhil Jain <nikhil@illinois.edu> | |
| Mon, 26 May 2014 04:57:22 +0000 (26 04:57 +0000) | ||
| committer | Gerrit Code Review <gerrit2@charm.cs.uiuc.edu> | |
| Thu, 29 May 2014 06:35:31 +0000 (29 01:35 -0500) | ||
| tree | db4a18a6603010ee187dbf02adc5e1843d3d2c24 | treesnapshot (tar.gz zip) |
| parent | cefd85b4373eaca5030aacbe9496135bc40002c5 | commitdiff |
BG/Q: force compilation of QPX based memcopy with O3
Recently, we observed erratic behavior by CmiMemcpy on BG/Q
which uses QPX unit. We found that if compiled without -O3,
QPX based code generates incorrect assembly and hence incorrect
output. This workaround forces use of O3 while compiling that
part of code, till IBM fixes the issues. Compiler versions
that showed this behavior:
/soft/compilers/ibmcmp-aug2013/vac/bg/12.1/ (on vesta)
/soft/compilers/ibmcmp-feb2014/vac/bg/12.1/ (on vesta)
Driver: /bgsys/drivers/V1R2M1/ppc64
Change-Id: I12ee1293955b7cd2cba8317109f22dbf347ef005
Recently, we observed erratic behavior by CmiMemcpy on BG/Q
which uses QPX unit. We found that if compiled without -O3,
QPX based code generates incorrect assembly and hence incorrect
output. This workaround forces use of O3 while compiling that
part of code, till IBM fixes the issues. Compiler versions
that showed this behavior:
/soft/compilers/ibmcmp-aug2013/vac/bg/12.1/ (on vesta)
/soft/compilers/ibmcmp-feb2014/vac/bg/12.1/ (on vesta)
Driver: /bgsys/drivers/V1R2M1/ppc64
Change-Id: I12ee1293955b7cd2cba8317109f22dbf347ef005