mirror of
https://github.com/amadvance/snapraid.git
synced 2026-10-26 19:01:57 -04:00
Improve speed benchmark stability with adaptive 1 ms sampling and best-result selection
This commit is contained in:
Andrea Mazzoleni
parent
2b784748e3
commit
0b356780c3
2 changed files with 75 additions and 79 deletions
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@ -24,29 +24,35 @@ static int64_t diffgettimeofday(struct timeval* start, struct timeval* stop)
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return d;
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}
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/**
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* Start time measurement.
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*/
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/* INDENT-OFF */
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#define SPEED_START \
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count = 0; \
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gettimeofday(&start, 0); \
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do { \
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for (i = 0; i < delta; ++i)
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{ \
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int speed_delta_ = delta; \
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int64_t elapsed_ = 0; \
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int64_t best_dt_ = INT64_MAX; \
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do { \
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gettimeofday(&start, 0); \
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for (int i_ = 0; i_ < speed_delta_; ++i_)
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/* INDENT-ON */
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/**
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* Stop time measurement.
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*/
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/* INDENT-OFF */
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#define SPEED_STOP \
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count += delta; \
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gettimeofday(&stop, 0); \
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} while (diffgettimeofday(&start, &stop) < period * 1000LL); \
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ds = size * (int64_t)count * nd; \
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dt = diffgettimeofday(&start, &stop);
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dt = diffgettimeofday(&start, &stop); \
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if (dt < 1000 && speed_delta_ <= INT_MAX / 2) { \
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speed_delta_ *= 2; \
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elapsed_ = 0; \
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best_dt_ = INT64_MAX; \
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continue; \
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} \
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elapsed_ += dt; \
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if (dt < best_dt_) \
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best_dt_ = dt; \
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} while (elapsed_ < period * 1000LL); \
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ds = size * (int64_t)speed_delta_ * nd; \
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dt = best_dt_; \
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}
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/* INDENT-ON */
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/**
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* Global variable used to propagate side effects.
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*
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@ -61,16 +67,15 @@ void speed_mem(int nd, void** v, int size, int delta, int period)
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struct timeval stop;
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int64_t ds;
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int64_t dt;
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int i, j;
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int count;
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int i;
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printf("Memory write speed using the C memset() function:\n");
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printf("%8s", "memset");
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fflush(stdout);
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SPEED_START {
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for (j = 0; j < nd; ++j)
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memset(v[j], j, size);
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for (i = 0; i < nd; ++i)
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memset(v[i], i, size);
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} SPEED_STOP
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printf("%8" PRIu64, ds / dt);
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@ -84,8 +89,7 @@ void speed_crc(int nd, void** v, int size, int delta, int period)
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struct timeval stop;
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int64_t ds;
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int64_t dt;
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int i, j;
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int count;
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int i;
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/* crc table */
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printf("CRC used to check the content file integrity:\n");
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@ -94,8 +98,8 @@ void speed_crc(int nd, void** v, int size, int delta, int period)
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fflush(stdout);
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SPEED_START {
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for (j = 0; j < nd; ++j)
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side_effect += crc32c_gen(0, v[j], size);
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for (i = 0; i < nd; ++i)
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side_effect += crc32c_gen(0, v[i], size);
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} SPEED_STOP
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printf("%8" PRIu64, ds / dt);
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@ -107,8 +111,8 @@ void speed_crc(int nd, void** v, int size, int delta, int period)
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fflush(stdout);
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SPEED_START {
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for (j = 0; j < nd; ++j)
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side_effect += crc32c_x86(0, v[j], size);
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for (i = 0; i < nd; ++i)
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side_effect += crc32c_x86(0, v[i], size);
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} SPEED_STOP
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printf("%8" PRIu64, ds / dt);
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@ -121,8 +125,8 @@ void speed_crc(int nd, void** v, int size, int delta, int period)
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fflush(stdout);
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SPEED_START {
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for (j = 0; j < nd; ++j)
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side_effect += crc32c_arm64(0, v[j], size);
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for (i = 0; i < nd; ++i)
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side_effect += crc32c_arm64(0, v[i], size);
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} SPEED_STOP
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printf("%8" PRIu64, ds / dt);
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@ -138,8 +142,7 @@ void speed_hash(int nd, void** v, int size, int delta, int period)
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struct timeval stop;
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int64_t ds;
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int64_t dt;
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int i, j;
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int count;
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int i;
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unsigned char digest[HASH_MAX];
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unsigned char seed[HASH_MAX];
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@ -162,24 +165,24 @@ void speed_hash(int nd, void** v, int size, int delta, int period)
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fflush(stdout);
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SPEED_START {
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for (j = 0; j < nd; ++j)
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memhash(HASH_MURMUR3, seed, digest, v[j], size);
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for (i = 0; i < nd; ++i)
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memhash(HASH_MURMUR3, seed, digest, v[i], size);
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} SPEED_STOP
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printf("%8" PRIu64, ds / dt);
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fflush(stdout);
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SPEED_START {
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for (j = 0; j < nd; ++j)
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memhash(HASH_SPOOKY2, seed, digest, v[j], size);
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for (i = 0; i < nd; ++i)
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memhash(HASH_SPOOKY2, seed, digest, v[i], size);
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} SPEED_STOP
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printf("%8" PRIu64, ds / dt);
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fflush(stdout);
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SPEED_START {
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for (j = 0; j < nd; ++j)
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memhash(HASH_MUSEAIR, seed, digest, v[j], size);
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for (i = 0; i < nd; ++i)
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memhash(HASH_MUSEAIR, seed, digest, v[i], size);
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} SPEED_STOP
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printf("%8" PRIu64, ds / dt);
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@ -193,8 +196,6 @@ void speed_gen(int nd, void** v, int size, int delta, int period, const char* ms
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struct timeval stop;
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int64_t ds;
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int64_t dt;
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int i;
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int count;
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int mode = raid_mode(RAID_MODE_GET);
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/* RAID table */
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@ -1080,8 +1081,6 @@ void speed_genz(int nd, void** v, int size, int delta, int period)
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struct timeval stop;
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int64_t ds;
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int64_t dt;
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int i;
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int count;
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/* Vandermonde table */
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printf("Vandermonde functions used for computing parity with 'sync':\n");
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@ -1204,7 +1203,6 @@ void speed_rec(int nd, void** v, int size, int delta, int period)
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int64_t ds;
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int64_t dt;
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int i;
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int count;
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int id[RAID_PARITY_MAX];
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int ip[RAID_PARITY_MAX];
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@ -2358,9 +2356,8 @@ void speed(int period, int nd, int size)
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else
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size *= KIBI;
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if (period < 1)
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period = 1000;
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delta = period >= 1000 ? 10 : 1;
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period = 250;
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delta = 1; /* auto increased in SPEED_START */
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nv = nd + RAID_PARITY_MAX;
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@ -10,11 +10,16 @@
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#include <sys/time.h>
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#include <stdio.h>
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#include <inttypes.h>
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#include <limits.h>
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/*
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* Size of the blocks to test.
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*/
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#ifdef COVERAGE
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#define TEST_SIZE (4 * 1024)
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#else
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#define TEST_SIZE (256 * 1024)
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#endif
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/*
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* Number of data blocks to test.
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@ -34,35 +39,35 @@ static int64_t diffgettimeofday(struct timeval *start, struct timeval *stop)
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return d;
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}
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/**
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* Test period.
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*/
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#ifdef COVERAGE
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#define TEST_PERIOD 100000LL
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#define TEST_DELTA 1
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#else
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#define TEST_PERIOD 1000000LL
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#define TEST_DELTA 10
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#endif
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/**
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* Start time measurement.
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*/
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/* INDENT-OFF */
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#define SPEED_START \
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count = 0; \
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gettimeofday(&start, 0); \
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do { \
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for (i = 0; i < delta; ++i)
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{ \
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int speed_delta_ = delta; \
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int64_t elapsed_ = 0; \
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int64_t best_dt_ = INT64_MAX; \
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do { \
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gettimeofday(&start, 0); \
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for (int i_ = 0; i_ < speed_delta_; ++i_)
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/* INDENT-ON */
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/**
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* Stop time measurement.
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*/
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/* INDENT-OFF */
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#define SPEED_STOP \
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count += delta; \
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gettimeofday(&stop, 0); \
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} while (diffgettimeofday(&start, &stop) < period); \
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ds = size * (int64_t)count * nd; \
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dt = diffgettimeofday(&start, &stop);
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dt = diffgettimeofday(&start, &stop); \
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if (dt < 1000 && speed_delta_ <= INT_MAX / 2) { \
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speed_delta_ *= 2; \
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elapsed_ = 0; \
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best_dt_ = INT64_MAX; \
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continue; \
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} \
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elapsed_ += dt; \
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if (dt < best_dt_) \
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best_dt_ = dt; \
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} while (elapsed_ < period * 1000LL); \
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ds = size * (int64_t)speed_delta_ * nd; \
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dt = best_dt_; \
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}
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/* INDENT-ON */
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void speed_mem(int nd, void **v, int size, int delta, int period)
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{
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@ -70,16 +75,15 @@ void speed_mem(int nd, void **v, int size, int delta, int period)
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struct timeval stop;
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int64_t ds;
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int64_t dt;
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int i, j;
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int count;
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int i;
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printf("Memory write speed using the C memset() function:\n");
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printf("%8s", "memset");
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fflush(stdout);
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SPEED_START {
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for (j = 0; j < nd; ++j)
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memset(v[j], j, size);
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for (i = 0; i < nd; ++i)
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memset(v[i], i, size);
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} SPEED_STOP
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printf("%8" PRIu64, ds / dt);
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@ -93,8 +97,6 @@ void speed_gen(int nd, void **v, int size, int delta, int period, const char *ms
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struct timeval stop;
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int64_t ds;
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int64_t dt;
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int i;
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int count;
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int mode = raid_mode(RAID_MODE_GET);
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/* RAID table */
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@ -976,8 +978,6 @@ void speed_genz(int nd, void **v, int size, int delta, int period)
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struct timeval stop;
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int64_t ds;
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int64_t dt;
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int i;
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int count;
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/* Vandermonde table */
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printf("Vandermonde functions used for computing the parity:\n");
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@ -1102,7 +1102,6 @@ void speed_rec(int nd, void **v, int size, int delta, int period)
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int i;
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int id[RAID_PARITY_MAX];
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int ip[RAID_PARITY_MAX];
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int count;
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/* basic disks and parity mapping */
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for (i = 0; i < RAID_PARITY_MAX; ++i) {
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@ -2138,8 +2137,8 @@ void speed(void)
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void **v;
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int i;
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int size = TEST_SIZE;
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int delta = TEST_DELTA;
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int period = TEST_PERIOD;
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int period = 250;
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int delta = 1; /* auto increased in SPEED_START */
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nv = nd + RAID_PARITY_MAX;
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