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Avoid to recompute the block status multiple times

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Store it in a bit vector and reuse the result.
This commit is contained in:
Andrea Mazzoleni 2021-05-22 11:37:36 +02:00
parent f0a5268d32
commit 2a5b5499c4
7 changed files with 59 additions and 31 deletions
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9
cmdline/scrub.c
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@ -50,9 +50,8 @@ struct snapraid_plan {
/**
* Check if we have to process the specified block index ::i.
*/
static int block_is_enabled(void* void_plan, block_off_t i)
static int block_is_enabled(struct snapraid_plan* plan, block_off_t i)
{
struct snapraid_plan* plan = void_plan;
time_t blocktime;
snapraid_info info;
@ -268,6 +267,7 @@ static int state_scrub_process(struct snapraid_state* state, struct snapraid_par
unsigned* waiting_map;
unsigned waiting_mac;
char esc_buffer[ESC_MAX];
bit_vect_t* block_enabled;
/* maps the disks to handles */
handle = handle_mapping(state, &diskmax);
@ -294,9 +294,11 @@ static int state_scrub_process(struct snapraid_state* state, struct snapraid_par
/* first count the number of blocks to process */
countmax = 0;
plan->countlast = 0;
block_enabled = calloc_nofail(1, bit_vect_size(blockmax)); /* preinitialize to 0 */
for (blockcur = blockstart; blockcur < blockmax; ++blockcur) {
if (!block_is_enabled(plan, blockcur))
continue;
bit_vect_set(block_enabled, blockcur);
++countmax;
}
@ -317,7 +319,7 @@ static int state_scrub_process(struct snapraid_state* state, struct snapraid_par
msg_progress("Scrubbing...\n");
/* start all the worker threads */
io_start(&io, blockstart, blockmax, &block_is_enabled, plan);
io_start(&io, blockstart, blockmax, block_enabled);
state_progress_begin(state, blockstart, blockmax, countmax);
while (1) {
@ -704,6 +706,7 @@ bail:
free(rehandle_alloc);
free(waiting_map);
io_done(&io);
free(block_enabled);
if (state->opt.expect_recoverable) {
if (error + silent_error + io_error == 0)