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util: add abstractions for accessing histogram buckets

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This simplifies some upcoming changes, where the
buckets will be a dynamically allocated array instead
of a static 2-dimensional array.

Signed-off-by: Jim Harris <james.r.harris@intel.com>
Change-Id: I3854319385937be9f9ace4be7dd22423e24f25e3

Reviewed-on: https://review.gerrithub.io/392706
Reviewed-by: Daniel Verkamp <daniel.verkamp@intel.com>
Tested-by: SPDK Automated Test System <sys_sgsw@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
This commit is contained in:
Jim Harris 2017-12-21 13:22:29 -07:00 committed by Daniel Verkamp
parent 87b8c7db3c
commit 2eeec4be49
1 changed files with 15 additions and 3 deletions
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18
include/spdk/histogram_data.h
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@ -91,6 +91,18 @@ struct spdk_histogram_data {
};
static inline void
__spdk_histogram_increment(struct spdk_histogram_data *h, uint32_t range, uint32_t index)
{
h->bucket[range][index]++;
}
static inline uint64_t
__spdk_histogram_get_count(const struct spdk_histogram_data *h, uint32_t range, uint32_t index)
{
return h->bucket[range][index];
}
static inline void
spdk_histogram_data_reset(struct spdk_histogram_data *histogram)
{
@ -136,7 +148,7 @@ spdk_histogram_data_tally(struct spdk_histogram_data *histogram, uint64_t datapo
uint32_t range = __spdk_histogram_data_get_bucket_range(histogram, datapoint);
uint32_t index = __spdk_histogram_data_get_bucket_index(histogram, datapoint, range);
histogram->bucket[range][index]++;
__spdk_histogram_increment(histogram, range, index);
}
static inline uint64_t
@ -170,7 +182,7 @@ spdk_histogram_data_iterate(const struct spdk_histogram_data *histogram,
for (i = 0; i < SPDK_HISTOGRAM_NUM_BUCKET_RANGES(histogram); i++) {
for (j = 0; j < SPDK_HISTOGRAM_NUM_BUCKETS_PER_RANGE(histogram); j++) {
total += histogram->bucket[i][j];
total += __spdk_histogram_get_count(histogram, i, j);
}
}
@ -179,7 +191,7 @@ spdk_histogram_data_iterate(const struct spdk_histogram_data *histogram,
for (i = 0; i < SPDK_HISTOGRAM_NUM_BUCKET_RANGES(histogram); i++) {
for (j = 0; j < SPDK_HISTOGRAM_NUM_BUCKETS_PER_RANGE(histogram); j++) {
count = histogram->bucket[i][j];
count = __spdk_histogram_get_count(histogram, i, j);
so_far += count;
last_bucket = bucket;
bucket = __spdk_histogram_data_get_bucket_start(histogram, i, j);