From: Ben Peart <benpe...@microsoft.com>

Add tracing around initializing and discarding mempools. In discard report
on the amount of memory unused in the current block to help tune setting
the initial_size.

Signed-off-by: Ben Peart <benpe...@microsoft.com>
---

Notes:
    Base Ref: * git-trace-mempool
    Web-Diff: https://github.com/benpeart/git/commit/9ac84bbca2
    Checkout: git fetch https://github.com/benpeart/git git-trace-mempool-v1 && 
git checkout 9ac84bbca2

 mem-pool.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/mem-pool.c b/mem-pool.c
index a2841a4a9a..065389aaec 100644
--- a/mem-pool.c
+++ b/mem-pool.c
@@ -5,6 +5,7 @@
 #include "cache.h"
 #include "mem-pool.h"
 
+static struct trace_key trace_mem_pool = TRACE_KEY_INIT(MEMPOOL);
 #define BLOCK_GROWTH_SIZE 1024*1024 - sizeof(struct mp_block);
 
 /*
@@ -48,12 +49,16 @@ void mem_pool_init(struct mem_pool **mem_pool, size_t 
initial_size)
                mem_pool_alloc_block(pool, initial_size, NULL);
 
        *mem_pool = pool;
+       trace_printf_key(&trace_mem_pool, "mem_pool (%p): init (%"PRIuMAX") 
initial size\n",
+               pool, (uintmax_t)initial_size);
 }
 
 void mem_pool_discard(struct mem_pool *mem_pool, int invalidate_memory)
 {
        struct mp_block *block, *block_to_free;
 
+       trace_printf_key(&trace_mem_pool, "mem_pool (%p): discard (%"PRIuMAX") 
unused\n",
+               mem_pool, (uintmax_t)(mem_pool->mp_block->end - 
mem_pool->mp_block->next_free));
        block = mem_pool->mp_block;
        while (block)
        {

base-commit: bb75be6cb916297f271c846f2f9caa3daaaec718
-- 
2.18.0.windows.1

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