HP-UX 11i Knowledge-on-Demand
HP-UX 11i Knowledge-on-Demand
HP-UX 11i Knowledge-on-Demand
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Mercury caveats<br />
• The Mercury interface is <str<strong>on</strong>g>HP</str<strong>on</strong>g> proprietary.<br />
• Mercury values returned are to be c<strong>on</strong>sidered hints.<br />
− For example, values returned by hg_gethrcycles(), which are<br />
adjusted to return comparable value <strong>on</strong> all processors, may be off<br />
by a few cycles because the processors’ interval timers may drift<br />
with respect to each other.<br />
• Mercury advisories are to be c<strong>on</strong>sidered hints to the<br />
system.<br />
− For example, when calling hg_setcrit(), normally the kernel will<br />
h<strong>on</strong>or the request and not c<strong>on</strong>text switch the thread out. However,<br />
the kernel at some point may decide not to h<strong>on</strong>or this request. One<br />
reas<strong>on</strong> is that if c<strong>on</strong>text switching has been held off too much by this<br />
thread, it will no l<strong>on</strong>ger be h<strong>on</strong>ored.<br />
<str<strong>on</strong>g>HP</str<strong>on</strong>g>-<str<strong>on</strong>g>UX</str<strong>on</strong>g> <str<strong>on</strong>g>11i</str<strong>on</strong>g> v3 Training
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