void
vdev_raidz_math_init(void)
{
raidz_impl_ops_t *curr_impl;
zio_t *bench_zio = NULL;
raidz_map_t *bench_rm = NULL;
uint64_t bench_parity;
int i, c, fn;
/* move supported impl into raidz_supp_impl */
for (i = 0, c = 0; i < ARRAY_SIZE(raidz_all_maths); i++) {
curr_impl = (raidz_impl_ops_t *) raidz_all_maths[i];
/* initialize impl */
if (curr_impl->init)
curr_impl->init();
if (curr_impl->is_supported())
raidz_supp_impl[c++] = (raidz_impl_ops_t *) curr_impl;
}
membar_producer(); /* complete raidz_supp_impl[] init */
raidz_supp_impl_cnt = c; /* number of supported impl */
#if !defined(_KERNEL)
/* Skip benchmarking and use last implementation as fastest */
memcpy(&vdev_raidz_fastest_impl, raidz_supp_impl[raidz_supp_impl_cnt-1],
sizeof (vdev_raidz_fastest_impl));
strcpy(vdev_raidz_fastest_impl.name, "fastest");
raidz_math_initialized = B_TRUE;
/* Use 'cycle' math selection method for userspace */
VERIFY0(vdev_raidz_impl_set("cycle"));
return;
#endif
/* Fake an zio and run the benchmark on it */
bench_zio = kmem_zalloc(sizeof (zio_t), KM_SLEEP);
bench_zio->io_offset = 0;
bench_zio->io_size = BENCH_ZIO_SIZE; /* only data columns */
bench_zio->io_data = zio_data_buf_alloc(BENCH_ZIO_SIZE);
VERIFY(bench_zio->io_data);
memset(bench_zio->io_data, 0xAA, BENCH_ZIO_SIZE); /* warm up */
/* Benchmark parity generation methods */
for (fn = 0; fn < RAIDZ_GEN_NUM; fn++) {
bench_parity = fn + 1;
/* New raidz_map is needed for each generate_p/q/r */
bench_rm = vdev_raidz_map_alloc(bench_zio, SPA_MINBLOCKSHIFT,
BENCH_D_COLS + bench_parity, bench_parity);
benchmark_raidz_impl(bench_rm, fn, benchmark_gen_impl);
vdev_raidz_map_free(bench_rm);
}
/* Benchmark data reconstruction methods */
bench_rm = vdev_raidz_map_alloc(bench_zio, SPA_MINBLOCKSHIFT,
BENCH_COLS, PARITY_PQR);
for (fn = 0; fn < RAIDZ_REC_NUM; fn++)
benchmark_raidz_impl(bench_rm, fn, benchmark_rec_impl);
vdev_raidz_map_free(bench_rm);
/* cleanup the bench zio */
zio_data_buf_free(bench_zio->io_data, BENCH_ZIO_SIZE);
kmem_free(bench_zio, sizeof (zio_t));
/* install kstats for all impl */
raidz_math_kstat = kstat_create("zfs", 0, "vdev_raidz_bench", "misc",
KSTAT_TYPE_RAW, 0, KSTAT_FLAG_VIRTUAL);
if (raidz_math_kstat != NULL) {
raidz_math_kstat->ks_data = NULL;
raidz_math_kstat->ks_ndata = UINT32_MAX;
kstat_set_raw_ops(raidz_math_kstat,
raidz_math_kstat_headers,
raidz_math_kstat_data,
raidz_math_kstat_addr);
kstat_install(raidz_math_kstat);
}
/* Finish initialization */
atomic_swap_32(&zfs_vdev_raidz_impl, user_sel_impl);
raidz_math_initialized = B_TRUE;
}
void
vdev_raidz_math_init(void)
{
raidz_impl_ops_t *curr_impl;
zio_t *bench_zio = NULL;
raidz_map_t *bench_rm = NULL;
uint64_t bench_parity;
int i, c, fn;
/* init & vdev_raidz_impl_lock */
rw_init(&vdev_raidz_impl_lock, NULL, RW_DEFAULT, NULL);
/* move supported impl into raidz_supp_impl */
for (i = 0, c = 0; i < ARRAY_SIZE(raidz_all_maths); i++) {
curr_impl = (raidz_impl_ops_t *) raidz_all_maths[i];
/* initialize impl */
if (curr_impl->init)
curr_impl->init();
if (curr_impl->is_supported()) {
/* init kstat */
init_raidz_kstat(&raidz_impl_kstats[c],
curr_impl->name);
raidz_supp_impl[c++] = (raidz_impl_ops_t *) curr_impl;
}
}
raidz_supp_impl_cnt = c; /* number of supported impl */
raidz_supp_impl[c] = NULL; /* sentinel */
/* init kstat for original routines */
init_raidz_kstat(&(raidz_impl_kstats[raidz_supp_impl_cnt]), "original");
#if !defined(_KERNEL)
/*
* Skip benchmarking and use last implementation as fastest
*/
memcpy(&vdev_raidz_fastest_impl, raidz_supp_impl[raidz_supp_impl_cnt-1],
sizeof (vdev_raidz_fastest_impl));
vdev_raidz_fastest_impl.name = "fastest";
raidz_math_initialized = B_TRUE;
/* Use 'cycle' math selection method for userspace */
VERIFY0(vdev_raidz_impl_set("cycle"));
return;
#endif
/* Fake an zio and run the benchmark on it */
bench_zio = kmem_zalloc(sizeof (zio_t), KM_SLEEP);
bench_zio->io_offset = 0;
bench_zio->io_size = BENCH_ZIO_SIZE; /* only data columns */
bench_zio->io_data = zio_data_buf_alloc(BENCH_ZIO_SIZE);
VERIFY(bench_zio->io_data);
/* Benchmark parity generation methods */
for (fn = 0; fn < RAIDZ_GEN_NUM; fn++) {
bench_parity = fn + 1;
/* New raidz_map is needed for each generate_p/q/r */
bench_rm = vdev_raidz_map_alloc(bench_zio, 9,
BENCH_D_COLS + bench_parity, bench_parity);
benchmark_raidz_impl(bench_rm, fn, benchmark_gen_impl);
vdev_raidz_map_free(bench_rm);
}
/* Benchmark data reconstruction methods */
bench_rm = vdev_raidz_map_alloc(bench_zio, 9, BENCH_COLS, PARITY_PQR);
for (fn = 0; fn < RAIDZ_REC_NUM; fn++)
benchmark_raidz_impl(bench_rm, fn, benchmark_rec_impl);
vdev_raidz_map_free(bench_rm);
/* cleanup the bench zio */
zio_data_buf_free(bench_zio->io_data, BENCH_ZIO_SIZE);
kmem_free(bench_zio, sizeof (zio_t));
/* install kstats for all impl */
raidz_math_kstat = kstat_create("zfs", 0, "vdev_raidz_bench",
"misc", KSTAT_TYPE_NAMED,
sizeof (raidz_impl_kstat_t) / sizeof (kstat_named_t) *
(raidz_supp_impl_cnt + 1), KSTAT_FLAG_VIRTUAL);
if (raidz_math_kstat != NULL) {
raidz_math_kstat->ks_data = raidz_impl_kstats;
kstat_install(raidz_math_kstat);
}
/* Finish initialization */
raidz_math_initialized = B_TRUE;
if (!vdev_raidz_impl_user_set)
VERIFY0(vdev_raidz_impl_set("fastest"));
}
