libmemcached

scalability issues with memaslap client

Bug #1721048 reported by Kornilios Kourtis
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libmemcached
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Bug Description

Multi-threaded scalability of memaslap is constrained by:
 * use of locks in statistics
 * use of rand() function that has an internal lock

Revision history for this message
Kornilios Kourtis (kkourt) wrote :

This patch changes the memaslap statistics to be per-thread, avoiding the need to synchronize when updating them.

Revision history for this message
Kornilios Kourtis (kkourt) wrote :

This patch replaces rand() with rand_r(), improving the scalability of memaslap. (The glibc implementation of rand() takes an internal lock.)

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