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<p class="MsoNormal"><span style="font-family: "Courier New";">Hello everyone,<br style="">
<br style="">
</span></p>
<p class="MsoNormal"><span style="font-family: "Courier New";">I'm quite curios
about the bandwidth to GPUs people are getting especially with NVIDIA C1060 or
Fermi on Intel hosts with two 5520 chipsets. Using bandwidthTest from CUDA SDK
and averaging the results over all cores and GPUs (we have S1070) I'm getting with
memory=pageable 3672 MB/s host to device and 3023 MB/s device to host. With memory=pinned
the numbers increase to 5499 MB/s and 5291 MB/s respectively which look okay
too me.</span></p>
<p class="MsoNormal"><span style="font-family: "Courier New";"> </span></p>
<p class="MsoPlainText"><span style="font-size: 11pt; font-family: "Courier New";">On
a two chipset host 1) there is obviously asymmetry resulting in low and high
numbers depending on affinity and, worryingly, 2) pinned bandwidth is a bit too
low.</span></p>
<p class="MsoPlainText"><span style="font-size: 11pt; font-family: "Courier New";">memory=pageable
</span></p>
<p class="MsoPlainText"><span style="font-size: 11pt; font-family: "Courier New";">host
to device: 3702/3716</span></p>
<p class="MsoPlainText"><span style="font-size: 11pt; font-family: "Courier New";">device
to host: 2880/1807</span></p>
<p class="MsoNormal"><span style="font-family: "Courier New";">memory=pinned</span><span style="font-family: "Courier New";"></span></p>
<p class="MsoPlainText"><span style="font-size: 11pt; font-family: "Courier New";">host
to device: 5751/4709</span></p>
<p class="MsoPlainText"><span style="font-size: 11pt; font-family: "Courier New";">device
to host: 3264/1873</span></p>
<p class="MsoNormal"><span style="font-family: "Courier New";"><br>
If you happen to have numbers for ATI GPUs and/or AMD based hosts please post
them too.</span></p>
<p class="MsoNormal"><span style="font-family: "Courier New";"> </span></p>
<p class="MsoNormal"><span style="font-family: "Courier New";">Thanks,</span></p>
<p class="MsoNormal"><span style="font-family: "Courier New";">Igor</span><span style="font-family: "Courier New";"></span></p>