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Ensure bandwidth minimum check is only performed when enough data has 

been written.
This commit is contained in:
Vincent Sanders 2015-04-30 14:28:18 +01:00
parent 05538c0264
commit 2aef095f27
1 changed files with 15 additions and 6 deletions
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21
content/llcache.c
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@ -2427,17 +2427,26 @@ write_backing_store(struct llcache_object *object,
* If the overall write bandwidth has fallen below a useful level for
* the backing store to be effective disable it.
*
* It is important to ensure a useful amount of data has been written
* before calculating bandwidths otherwise tiny files taking a
* disproportionately long time to write might trigger this erroneously.
*
* \param p The context pointer passed to the callback.
*/
static void llcache_persist_slowcheck(void *p)
{
unsigned long total_bandwidth; /* total bandwidth */
total_bandwidth = (llcache->total_written * 1000) / llcache->total_elapsed;
uint64_t total_bandwidth; /* total bandwidth */
if (total_bandwidth < llcache->minimum_bandwidth) {
LOG(("Cannot write minimum bandwidth"));
warn_user("LowDiscWriteBandwidth", 0);
guit->llcache->finalise();
if (llcache->total_written > (2 * llcache->minimum_bandwidth)) {
total_bandwidth = (llcache->total_written * 1000) / llcache->total_elapsed;
if (total_bandwidth < llcache->minimum_bandwidth) {
LOG(("Current bandwidth %llu less than minimum %llu",
total_bandwidth, llcache->minimum_bandwidth));
warn_user("LowDiscWriteBandwidth", 0);
guit->llcache->finalise();
}
}
}