HDFS-6287. Add vecsum test of libhdfs read access times (cmccabe)
git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1594751 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Colin McCabe
parent
65158e478f
commit
f2933f2535
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@ -361,6 +361,8 @@ Release 2.5.0 - UNRELEASED
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HDFS-2949. Add check to active state transition to prevent operator-induced
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split brain. (Rushabh S Shah via kihwal)
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HDFS-6287. Add vecsum test of libhdfs read access times (cmccabe)
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OPTIMIZATIONS
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HDFS-6214. Webhdfs has poor throughput for files >2GB (daryn)
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@ -62,6 +62,9 @@ endfunction()
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INCLUDE(CheckCSourceCompiles)
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CHECK_C_SOURCE_COMPILES("int main(void) { static __thread int i = 0; return 0; }" HAVE_BETTER_TLS)
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# Check to see if we have Intel SSE intrinsics.
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CHECK_C_SOURCE_COMPILES("#include <emmintrin.h>\nint main(void) { __m128d sum0 = _mm_set_pd(0.0,0.0); return 0; }" HAVE_INTEL_SSE_INTRINSICS)
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# Check if we need to link dl library to get dlopen.
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# dlopen on Linux is in separate library but on FreeBSD its in libc
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INCLUDE(CheckLibraryExists)
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@ -170,6 +173,15 @@ target_link_libraries(test_libhdfs_zerocopy
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pthread
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)
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add_executable(test_libhdfs_vecsum
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main/native/libhdfs/test/vecsum.c
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)
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target_link_libraries(test_libhdfs_vecsum
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hdfs
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pthread
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rt
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)
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IF(REQUIRE_LIBWEBHDFS)
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add_subdirectory(contrib/libwebhdfs)
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ENDIF(REQUIRE_LIBWEBHDFS)
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@ -22,4 +22,6 @@
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#cmakedefine HAVE_BETTER_TLS
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#cmakedefine HAVE_INTEL_SSE_INTRINSICS
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#endif
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@ -0,0 +1,804 @@
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/**
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <errno.h>
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#include <fcntl.h>
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#include <malloc.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/mman.h>
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#include <sys/resource.h>
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#include <sys/stat.h>
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#include <sys/time.h>
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#include <sys/types.h>
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#include <time.h>
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#include <unistd.h>
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#include "config.h"
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#include "hdfs.h"
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#define VECSUM_CHUNK_SIZE (8 * 1024 * 1024)
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#define ZCR_READ_CHUNK_SIZE (1024 * 1024 * 8)
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#define NORMAL_READ_CHUNK_SIZE (8 * 1024 * 1024)
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#define DOUBLES_PER_LOOP_ITER 16
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static double timespec_to_double(const struct timespec *ts)
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{
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double sec = ts->tv_sec;
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double nsec = ts->tv_nsec;
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return sec + (nsec / 1000000000L);
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}
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struct stopwatch {
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struct timespec start;
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struct timespec stop;
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struct rusage rusage;
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};
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static struct stopwatch *stopwatch_create(void)
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{
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struct stopwatch *watch;
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watch = calloc(1, sizeof(struct stopwatch));
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if (!watch) {
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fprintf(stderr, "failed to allocate memory for stopwatch\n");
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goto error;
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}
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if (clock_gettime(CLOCK_MONOTONIC, &watch->start)) {
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int err = errno;
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fprintf(stderr, "clock_gettime(CLOCK_MONOTONIC) failed with "
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"error %d (%s)\n", err, strerror(err));
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goto error;
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}
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if (getrusage(RUSAGE_THREAD, &watch->rusage) < 0) {
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int err = errno;
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fprintf(stderr, "getrusage failed: error %d (%s)\n",
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err, strerror(err));
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goto error;
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}
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return watch;
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error:
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free(watch);
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return NULL;
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}
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static void stopwatch_stop(struct stopwatch *watch,
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long long bytes_read)
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{
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double elapsed, rate;
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if (clock_gettime(CLOCK_MONOTONIC, &watch->stop)) {
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int err = errno;
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fprintf(stderr, "clock_gettime(CLOCK_MONOTONIC) failed with "
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"error %d (%s)\n", err, strerror(err));
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goto done;
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}
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elapsed = timespec_to_double(&watch->stop) -
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timespec_to_double(&watch->start);
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rate = (bytes_read / elapsed) / (1024 * 1024 * 1024);
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printf("stopwatch: took %.5g seconds to read %lld bytes, "
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"for %.5g GB/s\n", elapsed, bytes_read, rate);
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printf("stopwatch: %.5g seconds\n", elapsed);
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done:
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free(watch);
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}
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enum vecsum_type {
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VECSUM_LOCAL = 0,
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VECSUM_LIBHDFS,
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VECSUM_ZCR,
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};
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#define VECSUM_TYPE_VALID_VALUES "libhdfs, zcr, or local"
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int parse_vecsum_type(const char *str)
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{
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if (strcasecmp(str, "local") == 0)
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return VECSUM_LOCAL;
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else if (strcasecmp(str, "libhdfs") == 0)
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return VECSUM_LIBHDFS;
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else if (strcasecmp(str, "zcr") == 0)
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return VECSUM_ZCR;
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else
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return -1;
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}
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struct options {
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// The path to read.
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const char *path;
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// Length of the file.
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long long length;
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// The number of times to read the path.
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int passes;
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// Type of vecsum to do
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enum vecsum_type ty;
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// RPC address to use for HDFS
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const char *rpc_address;
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};
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static struct options *options_create(void)
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{
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struct options *opts = NULL;
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const char *pass_str;
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const char *ty_str;
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const char *length_str;
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int ty;
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opts = calloc(1, sizeof(struct options));
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if (!opts) {
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fprintf(stderr, "failed to calloc options\n");
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goto error;
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}
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opts->path = getenv("VECSUM_PATH");
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if (!opts->path) {
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fprintf(stderr, "You must set the VECSUM_PATH environment "
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"variable to the path of the file to read.\n");
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goto error;
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}
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length_str = getenv("VECSUM_LENGTH");
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if (!length_str) {
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length_str = "2147483648";
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}
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opts->length = atoll(length_str);
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if (!opts->length) {
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fprintf(stderr, "Can't parse VECSUM_LENGTH of '%s'.\n",
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length_str);
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goto error;
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}
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if (opts->length % VECSUM_CHUNK_SIZE) {
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fprintf(stderr, "VECSUM_LENGTH must be a multiple of '%lld'. The "
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"currently specified length of '%lld' is not.\n",
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(long long)VECSUM_CHUNK_SIZE, (long long)opts->length);
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goto error;
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}
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pass_str = getenv("VECSUM_PASSES");
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if (!pass_str) {
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fprintf(stderr, "You must set the VECSUM_PASSES environment "
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"variable to the number of passes to make.\n");
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goto error;
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}
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opts->passes = atoi(pass_str);
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if (opts->passes <= 0) {
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fprintf(stderr, "Invalid value for the VECSUM_PASSES "
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"environment variable. You must set this to a "
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"number greater than 0.\n");
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goto error;
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}
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ty_str = getenv("VECSUM_TYPE");
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if (!ty_str) {
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fprintf(stderr, "You must set the VECSUM_TYPE environment "
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"variable to " VECSUM_TYPE_VALID_VALUES "\n");
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goto error;
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}
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ty = parse_vecsum_type(ty_str);
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if (ty < 0) {
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fprintf(stderr, "Invalid VECSUM_TYPE environment variable. "
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"Valid values are " VECSUM_TYPE_VALID_VALUES "\n");
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goto error;
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}
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opts->ty = ty;
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opts->rpc_address = getenv("VECSUM_RPC_ADDRESS");
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if (!opts->rpc_address) {
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opts->rpc_address = "default";
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}
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return opts;
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error:
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free(opts);
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return NULL;
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}
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static int test_file_chunk_setup(double **chunk)
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{
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int i;
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double *c, val;
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c = malloc(VECSUM_CHUNK_SIZE);
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if (!c) {
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fprintf(stderr, "test_file_create: failed to malloc "
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"a buffer of size '%lld'\n",
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(long long) VECSUM_CHUNK_SIZE);
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return EIO;
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}
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val = 0.0;
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for (i = 0; i < VECSUM_CHUNK_SIZE / sizeof(double); i++) {
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c[i] = val;
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val += 0.5;
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}
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*chunk = c;
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return 0;
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}
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static void options_free(struct options *opts)
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{
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free(opts);
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}
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struct local_data {
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int fd;
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double *mmap;
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long long length;
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};
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static int local_data_create_file(struct local_data *cdata,
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const struct options *opts)
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{
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int ret = EIO;
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int dup_fd = -1;
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FILE *fp = NULL;
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double *chunk = NULL;
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long long offset = 0;
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dup_fd = dup(cdata->fd);
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if (dup_fd < 0) {
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ret = errno;
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fprintf(stderr, "local_data_create_file: dup failed: %s (%d)\n",
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strerror(ret), ret);
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goto done;
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}
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fp = fdopen(dup_fd, "w");
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if (!fp) {
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ret = errno;
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fprintf(stderr, "local_data_create_file: fdopen failed: %s (%d)\n",
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strerror(ret), ret);
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goto done;
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}
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ret = test_file_chunk_setup(&chunk);
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if (ret)
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goto done;
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while (offset < opts->length) {
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if (fwrite(chunk, VECSUM_CHUNK_SIZE, 1, fp) != 1) {
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fprintf(stderr, "local_data_create_file: failed to write to "
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"the local file '%s' at offset %lld\n",
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opts->path, offset);
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ret = EIO;
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goto done;
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}
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offset += VECSUM_CHUNK_SIZE;
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}
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fprintf(stderr, "local_data_create_file: successfully re-wrote %s as "
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"a file of length %lld\n", opts->path, opts->length);
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ret = 0;
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done:
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if (dup_fd >= 0) {
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close(dup_fd);
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}
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if (fp) {
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fclose(fp);
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}
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free(chunk);
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return ret;
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}
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static struct local_data *local_data_create(const struct options *opts)
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{
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struct local_data *cdata = NULL;
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struct stat st_buf;
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cdata = malloc(sizeof(*cdata));
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if (!cdata) {
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fprintf(stderr, "Failed to allocate local test data.\n");
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goto error;
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}
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cdata->fd = -1;
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cdata->mmap = MAP_FAILED;
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cdata->length = opts->length;
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cdata->fd = open(opts->path, O_RDWR | O_CREAT, 0777);
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if (cdata->fd < 0) {
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int err = errno;
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fprintf(stderr, "local_data_create: failed to open %s "
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"for read/write: error %d (%s)\n", opts->path, err, strerror(err));
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goto error;
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}
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if (fstat(cdata->fd, &st_buf)) {
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int err = errno;
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fprintf(stderr, "local_data_create: fstat(%s) failed: "
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"error %d (%s)\n", opts->path, err, strerror(err));
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goto error;
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}
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if (st_buf.st_size != opts->length) {
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int err;
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fprintf(stderr, "local_data_create: current size of %s is %lld, but "
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"we want %lld. Re-writing the file.\n",
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opts->path, (long long)st_buf.st_size,
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(long long)opts->length);
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err = local_data_create_file(cdata, opts);
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if (err)
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goto error;
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}
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cdata->mmap = mmap(NULL, cdata->length, PROT_READ,
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MAP_PRIVATE, cdata->fd, 0);
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if (cdata->mmap == MAP_FAILED) {
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int err = errno;
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fprintf(stderr, "local_data_create: mmap(%s) failed: "
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"error %d (%s)\n", opts->path, err, strerror(err));
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goto error;
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}
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return cdata;
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error:
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if (cdata) {
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if (cdata->fd >= 0) {
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close(cdata->fd);
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}
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free(cdata);
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}
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return NULL;
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}
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static void local_data_free(struct local_data *cdata)
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{
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close(cdata->fd);
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munmap(cdata->mmap, cdata->length);
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}
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struct libhdfs_data {
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hdfsFS fs;
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hdfsFile file;
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long long length;
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double *buf;
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};
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static void libhdfs_data_free(struct libhdfs_data *ldata)
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{
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if (ldata->fs) {
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free(ldata->buf);
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if (ldata->file) {
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hdfsCloseFile(ldata->fs, ldata->file);
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}
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hdfsDisconnect(ldata->fs);
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}
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free(ldata);
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}
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static int libhdfs_data_create_file(struct libhdfs_data *ldata,
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const struct options *opts)
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{
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int ret;
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double *chunk = NULL;
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long long offset = 0;
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ldata->file = hdfsOpenFile(ldata->fs, opts->path, O_WRONLY, 0, 1, 0);
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if (!ldata->file) {
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ret = errno;
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fprintf(stderr, "libhdfs_data_create_file: hdfsOpenFile(%s, "
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"O_WRONLY) failed: error %d (%s)\n", opts->path, ret,
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strerror(ret));
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goto done;
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}
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ret = test_file_chunk_setup(&chunk);
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if (ret)
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goto done;
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while (offset < opts->length) {
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ret = hdfsWrite(ldata->fs, ldata->file, chunk, VECSUM_CHUNK_SIZE);
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if (ret < 0) {
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ret = errno;
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fprintf(stderr, "libhdfs_data_create_file: got error %d (%s) at "
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"offset %lld of %s\n", ret, strerror(ret),
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offset, opts->path);
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goto done;
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} else if (ret < VECSUM_CHUNK_SIZE) {
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fprintf(stderr, "libhdfs_data_create_file: got short write "
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"of %d at offset %lld of %s\n", ret, offset, opts->path);
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goto done;
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}
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offset += VECSUM_CHUNK_SIZE;
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}
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ret = 0;
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done:
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free(chunk);
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if (ldata->file) {
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if (hdfsCloseFile(ldata->fs, ldata->file)) {
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fprintf(stderr, "libhdfs_data_create_file: hdfsCloseFile error.");
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ret = EIO;
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}
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ldata->file = NULL;
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}
|
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return ret;
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}
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|
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static struct libhdfs_data *libhdfs_data_create(const struct options *opts)
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{
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struct libhdfs_data *ldata = NULL;
|
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struct hdfsBuilder *builder = NULL;
|
||||
hdfsFileInfo *pinfo = NULL;
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|
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ldata = calloc(1, sizeof(struct libhdfs_data));
|
||||
if (!ldata) {
|
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fprintf(stderr, "Failed to allocate libhdfs test data.\n");
|
||||
goto error;
|
||||
}
|
||||
builder = hdfsNewBuilder();
|
||||
if (!builder) {
|
||||
fprintf(stderr, "Failed to create builder.\n");
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||||
goto error;
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||||
}
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hdfsBuilderSetNameNode(builder, opts->rpc_address);
|
||||
hdfsBuilderConfSetStr(builder,
|
||||
"dfs.client.read.shortcircuit.skip.checksum", "true");
|
||||
ldata->fs = hdfsBuilderConnect(builder);
|
||||
if (!ldata->fs) {
|
||||
fprintf(stderr, "Could not connect to default namenode!\n");
|
||||
goto error;
|
||||
}
|
||||
pinfo = hdfsGetPathInfo(ldata->fs, opts->path);
|
||||
if (!pinfo) {
|
||||
int err = errno;
|
||||
fprintf(stderr, "hdfsGetPathInfo(%s) failed: error %d (%s). "
|
||||
"Attempting to re-create file.\n",
|
||||
opts->path, err, strerror(err));
|
||||
if (libhdfs_data_create_file(ldata, opts))
|
||||
goto error;
|
||||
} else if (pinfo->mSize != opts->length) {
|
||||
fprintf(stderr, "hdfsGetPathInfo(%s) failed: length was %lld, "
|
||||
"but we want length %lld. Attempting to re-create file.\n",
|
||||
opts->path, (long long)pinfo->mSize, (long long)opts->length);
|
||||
if (libhdfs_data_create_file(ldata, opts))
|
||||
goto error;
|
||||
}
|
||||
ldata->file = hdfsOpenFile(ldata->fs, opts->path, O_RDONLY, 0, 0, 0);
|
||||
if (!ldata->file) {
|
||||
int err = errno;
|
||||
fprintf(stderr, "hdfsOpenFile(%s) failed: error %d (%s)\n",
|
||||
opts->path, err, strerror(err));
|
||||
goto error;
|
||||
}
|
||||
ldata->length = opts->length;
|
||||
return ldata;
|
||||
|
||||
error:
|
||||
if (pinfo)
|
||||
hdfsFreeFileInfo(pinfo, 1);
|
||||
if (ldata)
|
||||
libhdfs_data_free(ldata);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
static int check_byte_size(int byte_size, const char *const str)
|
||||
{
|
||||
if (byte_size % sizeof(double)) {
|
||||
fprintf(stderr, "%s is not a multiple "
|
||||
"of sizeof(double)\n", str);
|
||||
return EINVAL;
|
||||
}
|
||||
if ((byte_size / sizeof(double)) % DOUBLES_PER_LOOP_ITER) {
|
||||
fprintf(stderr, "The number of doubles contained in "
|
||||
"%s is not a multiple of DOUBLES_PER_LOOP_ITER\n",
|
||||
str);
|
||||
return EINVAL;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
#ifdef HAVE_INTEL_SSE_INTRINSICS
|
||||
|
||||
#include <emmintrin.h>
|
||||
|
||||
static double vecsum(const double *buf, int num_doubles)
|
||||
{
|
||||
int i;
|
||||
double hi, lo;
|
||||
__m128d x0, x1, x2, x3, x4, x5, x6, x7;
|
||||
__m128d sum0 = _mm_set_pd(0.0,0.0);
|
||||
__m128d sum1 = _mm_set_pd(0.0,0.0);
|
||||
__m128d sum2 = _mm_set_pd(0.0,0.0);
|
||||
__m128d sum3 = _mm_set_pd(0.0,0.0);
|
||||
__m128d sum4 = _mm_set_pd(0.0,0.0);
|
||||
__m128d sum5 = _mm_set_pd(0.0,0.0);
|
||||
__m128d sum6 = _mm_set_pd(0.0,0.0);
|
||||
__m128d sum7 = _mm_set_pd(0.0,0.0);
|
||||
for (i = 0; i < num_doubles; i+=DOUBLES_PER_LOOP_ITER) {
|
||||
x0 = _mm_load_pd(buf + i + 0);
|
||||
x1 = _mm_load_pd(buf + i + 2);
|
||||
x2 = _mm_load_pd(buf + i + 4);
|
||||
x3 = _mm_load_pd(buf + i + 6);
|
||||
x4 = _mm_load_pd(buf + i + 8);
|
||||
x5 = _mm_load_pd(buf + i + 10);
|
||||
x6 = _mm_load_pd(buf + i + 12);
|
||||
x7 = _mm_load_pd(buf + i + 14);
|
||||
sum0 = _mm_add_pd(sum0, x0);
|
||||
sum1 = _mm_add_pd(sum1, x1);
|
||||
sum2 = _mm_add_pd(sum2, x2);
|
||||
sum3 = _mm_add_pd(sum3, x3);
|
||||
sum4 = _mm_add_pd(sum4, x4);
|
||||
sum5 = _mm_add_pd(sum5, x5);
|
||||
sum6 = _mm_add_pd(sum6, x6);
|
||||
sum7 = _mm_add_pd(sum7, x7);
|
||||
}
|
||||
x0 = _mm_add_pd(sum0, sum1);
|
||||
x1 = _mm_add_pd(sum2, sum3);
|
||||
x2 = _mm_add_pd(sum4, sum5);
|
||||
x3 = _mm_add_pd(sum6, sum7);
|
||||
x4 = _mm_add_pd(x0, x1);
|
||||
x5 = _mm_add_pd(x2, x3);
|
||||
x6 = _mm_add_pd(x4, x5);
|
||||
_mm_storeh_pd(&hi, x6);
|
||||
_mm_storel_pd(&lo, x6);
|
||||
return hi + lo;
|
||||
}
|
||||
|
||||
#else
|
||||
|
||||
static double vecsum(const double *buf, int num_doubles)
|
||||
{
|
||||
int i;
|
||||
double sum = 0.0;
|
||||
for (i = 0; i < num_doubles; i++) {
|
||||
sum += buf[i];
|
||||
}
|
||||
return sum;
|
||||
}
|
||||
|
||||
#endif
|
||||
|
||||
static int vecsum_zcr_loop(int pass, struct libhdfs_data *ldata,
|
||||
struct hadoopRzOptions *zopts,
|
||||
const struct options *opts)
|
||||
{
|
||||
int32_t len;
|
||||
double sum = 0.0;
|
||||
const double *buf;
|
||||
struct hadoopRzBuffer *rzbuf = NULL;
|
||||
int ret;
|
||||
|
||||
while (1) {
|
||||
rzbuf = hadoopReadZero(ldata->file, zopts, ZCR_READ_CHUNK_SIZE);
|
||||
if (!rzbuf) {
|
||||
ret = errno;
|
||||
fprintf(stderr, "hadoopReadZero failed with error "
|
||||
"code %d (%s)\n", ret, strerror(ret));
|
||||
goto done;
|
||||
}
|
||||
buf = hadoopRzBufferGet(rzbuf);
|
||||
if (!buf) break;
|
||||
len = hadoopRzBufferLength(rzbuf);
|
||||
if (len < ZCR_READ_CHUNK_SIZE) {
|
||||
fprintf(stderr, "hadoopReadZero got a partial read "
|
||||
"of length %d\n", len);
|
||||
ret = EINVAL;
|
||||
goto done;
|
||||
}
|
||||
sum += vecsum(buf,
|
||||
ZCR_READ_CHUNK_SIZE / sizeof(double));
|
||||
hadoopRzBufferFree(ldata->file, rzbuf);
|
||||
}
|
||||
printf("finished zcr pass %d. sum = %g\n", pass, sum);
|
||||
ret = 0;
|
||||
|
||||
done:
|
||||
if (rzbuf)
|
||||
hadoopRzBufferFree(ldata->file, rzbuf);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int vecsum_zcr(struct libhdfs_data *ldata,
|
||||
const struct options *opts)
|
||||
{
|
||||
int ret, pass;
|
||||
struct hadoopRzOptions *zopts = NULL;
|
||||
|
||||
zopts = hadoopRzOptionsAlloc();
|
||||
if (!zopts) {
|
||||
fprintf(stderr, "hadoopRzOptionsAlloc failed.\n");
|
||||
ret = ENOMEM;
|
||||
goto done;
|
||||
}
|
||||
if (hadoopRzOptionsSetSkipChecksum(zopts, 1)) {
|
||||
ret = errno;
|
||||
perror("hadoopRzOptionsSetSkipChecksum failed: ");
|
||||
goto done;
|
||||
}
|
||||
if (hadoopRzOptionsSetByteBufferPool(zopts, NULL)) {
|
||||
ret = errno;
|
||||
perror("hadoopRzOptionsSetByteBufferPool failed: ");
|
||||
goto done;
|
||||
}
|
||||
for (pass = 0; pass < opts->passes; ++pass) {
|
||||
ret = vecsum_zcr_loop(pass, ldata, zopts, opts);
|
||||
if (ret) {
|
||||
fprintf(stderr, "vecsum_zcr_loop pass %d failed "
|
||||
"with error %d\n", pass, ret);
|
||||
goto done;
|
||||
}
|
||||
hdfsSeek(ldata->fs, ldata->file, 0);
|
||||
}
|
||||
ret = 0;
|
||||
done:
|
||||
if (zopts)
|
||||
hadoopRzOptionsFree(zopts);
|
||||
return ret;
|
||||
}
|
||||
|
||||
tSize hdfsReadFully(hdfsFS fs, hdfsFile f, void* buffer, tSize length)
|
||||
{
|
||||
uint8_t *buf = buffer;
|
||||
tSize ret, nread = 0;
|
||||
|
||||
while (length > 0) {
|
||||
ret = hdfsRead(fs, f, buf, length);
|
||||
if (ret < 0) {
|
||||
if (errno != EINTR) {
|
||||
return -1;
|
||||
}
|
||||
}
|
||||
if (ret == 0) {
|
||||
break;
|
||||
}
|
||||
nread += ret;
|
||||
length -= ret;
|
||||
buf += ret;
|
||||
}
|
||||
return nread;
|
||||
}
|
||||
|
||||
static int vecsum_normal_loop(int pass, const struct libhdfs_data *ldata,
|
||||
const struct options *opts)
|
||||
{
|
||||
double sum = 0.0;
|
||||
|
||||
while (1) {
|
||||
int res = hdfsReadFully(ldata->fs, ldata->file, ldata->buf,
|
||||
NORMAL_READ_CHUNK_SIZE);
|
||||
if (res == 0) // EOF
|
||||
break;
|
||||
if (res < 0) {
|
||||
int err = errno;
|
||||
fprintf(stderr, "hdfsRead failed with error %d (%s)\n",
|
||||
err, strerror(err));
|
||||
return err;
|
||||
}
|
||||
if (res < NORMAL_READ_CHUNK_SIZE) {
|
||||
fprintf(stderr, "hdfsRead got a partial read of "
|
||||
"length %d\n", res);
|
||||
return EINVAL;
|
||||
}
|
||||
sum += vecsum(ldata->buf,
|
||||
NORMAL_READ_CHUNK_SIZE / sizeof(double));
|
||||
}
|
||||
printf("finished normal pass %d. sum = %g\n", pass, sum);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int vecsum_libhdfs(struct libhdfs_data *ldata,
|
||||
const struct options *opts)
|
||||
{
|
||||
int pass;
|
||||
|
||||
ldata->buf = malloc(NORMAL_READ_CHUNK_SIZE);
|
||||
if (!ldata->buf) {
|
||||
fprintf(stderr, "failed to malloc buffer of size %d\n",
|
||||
NORMAL_READ_CHUNK_SIZE);
|
||||
return ENOMEM;
|
||||
}
|
||||
for (pass = 0; pass < opts->passes; ++pass) {
|
||||
int ret = vecsum_normal_loop(pass, ldata, opts);
|
||||
if (ret) {
|
||||
fprintf(stderr, "vecsum_normal_loop pass %d failed "
|
||||
"with error %d\n", pass, ret);
|
||||
return ret;
|
||||
}
|
||||
hdfsSeek(ldata->fs, ldata->file, 0);
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void vecsum_local(struct local_data *cdata, const struct options *opts)
|
||||
{
|
||||
int pass;
|
||||
|
||||
for (pass = 0; pass < opts->passes; pass++) {
|
||||
double sum = vecsum(cdata->mmap, cdata->length / sizeof(double));
|
||||
printf("finished vecsum_local pass %d. sum = %g\n", pass, sum);
|
||||
}
|
||||
}
|
||||
|
||||
static long long vecsum_length(const struct options *opts,
|
||||
const struct libhdfs_data *ldata)
|
||||
{
|
||||
if (opts->ty == VECSUM_LOCAL) {
|
||||
struct stat st_buf = { 0 };
|
||||
if (stat(opts->path, &st_buf)) {
|
||||
int err = errno;
|
||||
fprintf(stderr, "vecsum_length: stat(%s) failed: "
|
||||
"error %d (%s)\n", opts->path, err, strerror(err));
|
||||
return -EIO;
|
||||
}
|
||||
return st_buf.st_size;
|
||||
} else {
|
||||
return ldata->length;
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* vecsum is a microbenchmark which measures the speed of various ways of
|
||||
* reading from HDFS. It creates a file containing floating-point 'doubles',
|
||||
* and computes the sum of all the doubles several times. For some CPUs,
|
||||
* assembly optimizations are used for the summation (SSE, etc).
|
||||
*/
|
||||
int main(void)
|
||||
{
|
||||
int ret = 1;
|
||||
struct options *opts = NULL;
|
||||
struct local_data *cdata = NULL;
|
||||
struct libhdfs_data *ldata = NULL;
|
||||
struct stopwatch *watch = NULL;
|
||||
|
||||
if (check_byte_size(VECSUM_CHUNK_SIZE, "VECSUM_CHUNK_SIZE") ||
|
||||
check_byte_size(ZCR_READ_CHUNK_SIZE,
|
||||
"ZCR_READ_CHUNK_SIZE") ||
|
||||
check_byte_size(NORMAL_READ_CHUNK_SIZE,
|
||||
"NORMAL_READ_CHUNK_SIZE")) {
|
||||
goto done;
|
||||
}
|
||||
opts = options_create();
|
||||
if (!opts)
|
||||
goto done;
|
||||
if (opts->ty == VECSUM_LOCAL) {
|
||||
cdata = local_data_create(opts);
|
||||
if (!cdata)
|
||||
goto done;
|
||||
} else {
|
||||
ldata = libhdfs_data_create(opts);
|
||||
if (!ldata)
|
||||
goto done;
|
||||
}
|
||||
watch = stopwatch_create();
|
||||
if (!watch)
|
||||
goto done;
|
||||
switch (opts->ty) {
|
||||
case VECSUM_LOCAL:
|
||||
vecsum_local(cdata, opts);
|
||||
ret = 0;
|
||||
break;
|
||||
case VECSUM_LIBHDFS:
|
||||
ret = vecsum_libhdfs(ldata, opts);
|
||||
break;
|
||||
case VECSUM_ZCR:
|
||||
ret = vecsum_zcr(ldata, opts);
|
||||
break;
|
||||
}
|
||||
if (ret) {
|
||||
fprintf(stderr, "vecsum failed with error %d\n", ret);
|
||||
goto done;
|
||||
}
|
||||
ret = 0;
|
||||
done:
|
||||
fprintf(stderr, "cleaning up...\n");
|
||||
if (watch && (ret == 0)) {
|
||||
long long length = vecsum_length(opts, ldata);
|
||||
if (length >= 0) {
|
||||
stopwatch_stop(watch, length * opts->passes);
|
||||
}
|
||||
}
|
||||
if (cdata)
|
||||
local_data_free(cdata);
|
||||
if (ldata)
|
||||
libhdfs_data_free(ldata);
|
||||
if (opts)
|
||||
options_free(opts);
|
||||
return ret;
|
||||
}
|
||||
|
||||
// vim: ts=4:sw=4:tw=79:et
|
||||
|
|
@ -122,7 +122,7 @@ struct tlhPaths {
|
|||
|
||||
static int setupPaths(const struct tlhThreadInfo *ti, struct tlhPaths *paths)
|
||||
{
|
||||
memset(paths, sizeof(*paths), 0);
|
||||
memset(paths, 0, sizeof(*paths));
|
||||
if (snprintf(paths->prefix, sizeof(paths->prefix), "/tlhData%04d",
|
||||
ti->threadIdx) >= sizeof(paths->prefix)) {
|
||||
return ENAMETOOLONG;
|
||||
|
|
|
|||
Loading…
Reference in New Issue