Add a new notion of "stamps" to be a fast 32-bit monotonic timestamp

The goal here is to replace our use of msec-based timestamps with
something less precise, but easier to calculate.  We're doing this
because calculating lots of msec-based timestamps requires lots of
64/32 division operations, which can be inefficient on 32-bit
platforms.

We make sure that these stamps can be calculated using only the
coarse monotonic timer and 32-bit bitwise operations.

1 files changed, 1 insertions, 2 deletions

diff --git a/src/common/buffers.h b/src/common/buffers.h
index 1eaa5f2d04..fe392d268f 100644
--- a/src/common/buffers.h
+++ b/src/common/buffers.h
@@ -79,8 +79,7 @@ typedef struct chunk_t {
   size_t DBG_alloc;
 #endif
   char *data; /**< A pointer to the first byte of data stored in <b>mem</b>. */
-  uint32_t inserted_time; /**< Timestamp in truncated ms since epoch
-                           * when this chunk was inserted. */
+  uint32_t inserted_time; /**< Timestamp when this chunk was inserted. */
   char mem[FLEXIBLE_ARRAY_MEMBER]; /**< The actual memory used for storage in
                 * this chunk. */
 } chunk_t;