<html><head><style type='text/css'>p { margin: 0; }</style></head><body><div style='font-family: Times New Roman; font-size: 12pt; color: #000000'>Which version of Erlang?<br><br><hr id="zwchr"><blockquote style="border-left:2px solid rgb(16, 16, 255);margin-left:5px;padding-left:5px;color:#000;font-weight:normal;font-style:normal;text-decoration:none;font-family:Helvetica,Arial,sans-serif;font-size:12pt;"><span class="Apple-style-span" style="font-family: Arial, 'Liberation Sans', 'DejaVu Sans', sans-serif; font-size: 14px; border-collapse: collapse; line-height: 18px; "><div><span class="Apple-style-span" style="font-family: Arial, 'Liberation Sans', 'DejaVu Sans', sans-serif; font-size: 14px; border-collapse: collapse; line-height: 18px; ">hi</span></div><div><span class="Apple-style-span" style="font-family: Arial, 'Liberation Sans', 'DejaVu Sans', sans-serif; font-size: 14px; border-collapse: collapse; line-height: 18px; "><br></span></div><span class="Apple-tab-span" style="white-space:pre"> </span>we have a application used to run on centos but now we want to migrate it to AIX. During the test on Aix, we found the cpu scaling of the system is quite disappointing. With 8 cores and erlang smp auto, there were very high system cpu consumption and lots of thread_wait_lock call in the truss(strace) log, which would not appear on centos under the same test scenario. And the sys call will disappear if we turn smp off.</span><div><span class="Apple-style-span" style="font-family: Arial, 'Liberation Sans', 'DejaVu Sans', sans-serif; font-size: 14px; border-collapse: collapse; line-height: 18px; "><span class="Apple-tab-span" style="white-space:pre"> </span> So we guess there is something wrong with smp on Aix, perhaps caused by the schedulers switching. But we don't know where the thread_wait_call is from and what it is for. </span></div><div><span class="Apple-style-span" style="font-family: Arial, 'Liberation Sans', 'DejaVu Sans', sans-serif; font-size: 14px; border-collapse: collapse; line-height: 18px; "><span class="Apple-tab-span" style="white-space:pre"> </span>By the way, it is quite strange that the smp description of erl shell would be smp32:8 with smp auto on the 8 cores aix.</span></div><div><span class="Apple-style-span" style="font-family: Arial, 'Liberation Sans', 'DejaVu Sans', sans-serif; font-size: 14px; border-collapse: collapse; line-height: 18px; "><span class="Apple-tab-span" style="white-space:pre"> </span>Is there any hint to fix the problem? Appreciate your help.</span></div><br>_______________________________________________<br>erlang-questions mailing list<br>erlang-questions@erlang.org<br>http://erlang.org/mailman/listinfo/erlang-questions<br></blockquote><br></div></body></html>