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Fixes and enhancements of SIMD raidz parity

Browse Source 
- Implementation lock replaced with atomic variable

- Trailing whitespace is removed from user specified parameter, to enhance
experience when using commands that add newline, e.g. `echo`

- raidz_test: remove dependency on `getrusage()` and RUSAGE_THREAD, Issue #4813

- silence `cppcheck` in vdev_raidz, partial solution of Issue #1392

- Minor fixes and cleanups

- Enable use of original parity methods in [fastest] configuration.
New opaque original ops structure, representing native methods, is added
to supported raidz methods. Original parity methods are executed if selected
implementation has NULL fn pointer.

Signed-off-by: Gvozden Neskovic <neskovic@gmail.com>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Issue #4813
Issue #1392
This commit is contained in:
Gvozden Neskovic
2016-07-17 19:41:11 +02:00
committed by Brian Behlendorf
parent 1d9b3bd8fb
commit c9187d867f
9 changed files with 191 additions and 178 deletions
Download Patch File Download Diff File Expand all files Collapse all files
cmd/raidz_test/raidz_bench.c
+6 -20
View File
@@ -32,7 +32,6 @@
#include <stdio.h>
#include <sys/time.h>
#include <sys/resource.h>
#include "raidz_test.h"
@@ -42,7 +41,6 @@
#define MIN_CS_SHIFT BENCH_ASHIFT
#define MAX_CS_SHIFT SPA_MAXBLOCKSHIFT
static zio_t zio_bench;
static raidz_map_t *rm_bench;
static size_t max_data_size = SPA_MAXBLOCKSIZE;
@@ -70,28 +68,18 @@ bench_fini_raidz_maps(void)
bzero(&zio_bench, sizeof (zio_t));
}
static double
get_time_diff(struct rusage *start, struct rusage *stop)
{
return (((double)stop->ru_utime.tv_sec * (double)MICROSEC +
(double)stop->ru_utime.tv_usec) -
((double)start->ru_utime.tv_sec * (double)MICROSEC +
(double)start->ru_utime.tv_usec)) / (double)MICROSEC;
}
static inline void
run_gen_bench_impl(const char *impl)
{
int fn, ncols;
uint64_t ds, iter_cnt, iter, disksize;
struct rusage start, stop;
hrtime_t start;
double elapsed, d_bw;
/* Benchmark generate functions */
for (fn = 0; fn < RAIDZ_GEN_NUM; fn++) {
for (ds = MIN_CS_SHIFT; ds <= MAX_CS_SHIFT; ds++) {
/* create suitable raidz_map */
ncols = rto_opts.rto_dcols + fn + 1;
zio_bench.io_size = 1ULL << ds;
@@ -102,12 +90,11 @@ run_gen_bench_impl(const char *impl)
iter_cnt = GEN_BENCH_MEMORY;
iter_cnt /= zio_bench.io_size;
getrusage(RUSAGE_THREAD, &start);
start = gethrtime();
for (iter = 0; iter < iter_cnt; iter++)
vdev_raidz_generate_parity(rm_bench);
getrusage(RUSAGE_THREAD, &stop);
elapsed = NSEC2SEC((double) (gethrtime() - start));
elapsed = get_time_diff(&start, &stop);
disksize = (1ULL << ds) / rto_opts.rto_dcols;
d_bw = (double)iter_cnt * (double)disksize;
d_bw /= (1024.0 * 1024.0 * elapsed);
@@ -147,9 +134,9 @@ run_gen_bench(void)
static void
run_rec_bench_impl(const char *impl)
{
struct rusage start, stop;
int fn, ncols, nbad;
uint64_t ds, iter_cnt, iter, disksize;
hrtime_t start;
double elapsed, d_bw;
static const int tgt[7][3] = {
{1, 2, 3}, /* rec_p: bad QR & D[0] */
@@ -187,12 +174,11 @@ run_rec_bench_impl(const char *impl)
nbad = MIN(3, raidz_ncols(rm_bench) -
raidz_parity(rm_bench));
getrusage(RUSAGE_THREAD, &start);
start = gethrtime();
for (iter = 0; iter < iter_cnt; iter++)
vdev_raidz_reconstruct(rm_bench, tgt[fn], nbad);
getrusage(RUSAGE_THREAD, &stop);
elapsed = NSEC2SEC((double) (gethrtime() - start));
elapsed = get_time_diff(&start, &stop);
disksize = (1ULL << ds) / rto_opts.rto_dcols;
d_bw = (double)iter_cnt * (double)(disksize);
d_bw /= (1024.0 * 1024.0 * elapsed);