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[Xen-devel] xenoprof: flush remaining smples when sampling is stopped.
| To: | xen-devel@xxxxxxxxxxxxxxxxxxx |
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| Subject: | [Xen-devel] xenoprof: flush remaining smples when sampling is stopped. |
| From: | Isaku Yamahata <yamahata@xxxxxxxxxxxxx> |
| Date: | Thu, 13 Dec 2007 18:39:09 +0900 |
| Cc: | xen-ia64-devel@xxxxxxxxxxxxxxxxxxx |
| Delivery-date: | Thu, 13 Dec 2007 01:39:34 -0800 |
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xenoprof: flush remaining smples when sampling is stopped. Xenoprof notifies guest kernel via VIRQ_XENOPROF when sampled. But it does coarsly based on heuristic so that sometimes VIRQ_XENOPROF isn't delivered resulting in that oprofile daemon collects no sample. To avoid that situation, always send VIRQ_XENOPROF when sampling is stopped. -- yamahata
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