examples/nvme/perf: fix latency calculations
Signed-off-by: Jim Harris <james.r.harris@intel.com> Change-Id: I0c47f2086d4f895cd75f32efc7df30d7182adcb1 Reviewed-on: https://review.gerrithub.io/362269 Tested-by: SPDK Automated Test System <sys_sgsw@intel.com> Reviewed-by: Ben Walker <benjamin.walker@intel.com> Reviewed-by: Daniel Verkamp <daniel.verkamp@intel.com>
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@ -111,9 +111,10 @@ struct ns_entry {
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* store the bucket data.
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*/
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#define BUCKET_SHIFT 7
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#define BUCKET_LSB (64 - BUCKET_SHIFT)
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#define NUM_BUCKETS_PER_RANGE (1ULL << BUCKET_SHIFT)
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#define BUCKET_MASK (NUM_BUCKETS_PER_RANGE - 1)
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#define NUM_BUCKET_RANGES (64 - BUCKET_SHIFT + 1)
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#define NUM_BUCKET_RANGES (BUCKET_LSB + 1)
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struct ns_worker_ctx {
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struct ns_entry *entry;
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@ -206,8 +207,8 @@ get_bucket_range(uint64_t tsc)
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clz = __builtin_clzll(tsc);
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if (clz <= NUM_BUCKET_RANGES) {
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range = NUM_BUCKET_RANGES - clz;
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if (clz <= BUCKET_LSB) {
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range = BUCKET_LSB - clz;
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} else {
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range = 0;
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}
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