| #define _XOPEN_SOURCE 500 |
| |
| #include <unistd.h> |
| #include <fcntl.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <signal.h> |
| #include <ctype.h> |
| #include <errno.h> |
| #include <sys/ioctl.h> |
| #include <sys/types.h> |
| #include <sys/stat.h> |
| #include <sys/sysmacros.h> |
| #include <sys/mman.h> |
| #include <sys/time.h> |
| #include <linux/major.h> |
| typedef unsigned char u_char; /* horrible, for scsi.h */ |
| #include "sg_include.h" |
| #include "sg_err.h" |
| #include "llseek.h" |
| |
| /* A utility program for the Linux OS SCSI generic ("sg") device driver. |
| * Copyright (C) 2001, 2002 D. Gilbert |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2, or (at your option) |
| * any later version. |
| |
| This program reads data from the given SCSI device (typically a disk |
| or cdrom) and discards that data. Its primary goal is to time |
| multiple reads all from the same logical address. Its interface |
| is a subset of another member of this package: sg_dd which is a |
| "dd" variant. The input file can be a scsi generic device, a raw device |
| or a seekable file. Streams such as stdin are not acceptable. |
| The block size ('bs') is assumed to be 512 if not given. |
| Various arguments can take a multiplier suffix: |
| 'c','C' *1 'b','B' *512 'k' *1024 'K' *1000 |
| 'm' *(1024^2) 'M' *(1000^2) 'g' *(1024^3) 'G' *(1000^3) |
| |
| The "bpt" (blocks per transfer) argument controls the maximum number |
| of blocks in each transfer. The default value is 128. |
| For example if "bs=512" and "bpt=32" then a maximum of 32 blocks (16KB |
| in this case) is read from the sg device in a single SCSI command. |
| |
| This version should compile with Linux sg drivers with version numbers |
| >= 30000 . For mmap-ed IO the sg version number >= 30122 . |
| |
| */ |
| |
| static const char * version_str = "0.95 20021207"; |
| |
| #define DEF_BLOCK_SIZE 512 |
| #define DEF_BLOCKS_PER_TRANSFER 128 |
| #define DEF_SCSI_CDBSZ 10 |
| #define MAX_SCSI_CDBSZ 16 |
| |
| #define ME "sg_read: " |
| |
| #ifndef SG_FLAG_MMAP_IO |
| #define SG_FLAG_MMAP_IO 4 |
| #endif |
| |
| /* #define SG_DEBUG */ |
| |
| #define SENSE_BUFF_LEN 32 /* Arbitrary, could be larger */ |
| #define DEF_TIMEOUT 40000 /* 40,000 millisecs == 40 seconds */ |
| |
| #ifndef RAW_MAJOR |
| #define RAW_MAJOR 255 /*unlikey value */ |
| #endif |
| |
| #define FT_OTHER 0 /* filetype other than sg or raw device */ |
| #define FT_SG 1 /* filetype is sg char device */ |
| #define FT_RAW 2 /* filetype is raw char device */ |
| |
| static int sum_of_resids = 0; |
| |
| static int dd_count = -1; |
| static int in_full = 0; |
| static int in_partial = 0; |
| |
| static int pack_id_count = 0; |
| |
| static const char * proc_allow_dio = "/proc/scsi/sg/allow_dio"; |
| |
| static void install_handler (int sig_num, void (*sig_handler) (int sig)) |
| { |
| struct sigaction sigact; |
| sigaction (sig_num, NULL, &sigact); |
| if (sigact.sa_handler != SIG_IGN) |
| { |
| sigact.sa_handler = sig_handler; |
| sigemptyset (&sigact.sa_mask); |
| sigact.sa_flags = 0; |
| sigaction (sig_num, &sigact, NULL); |
| } |
| } |
| |
| void print_stats(int iters) |
| { |
| if (0 != dd_count) |
| fprintf(stderr, " remaining block count=%d\n", dd_count); |
| fprintf(stderr, "%d+%d records in", in_full - in_partial, in_partial); |
| if (iters > 0) |
| fprintf(stderr, ", SCSI commands issued: %d\n", iters); |
| else |
| fprintf(stderr, "\n"); |
| } |
| |
| static void interrupt_handler(int sig) |
| { |
| struct sigaction sigact; |
| |
| sigact.sa_handler = SIG_DFL; |
| sigemptyset (&sigact.sa_mask); |
| sigact.sa_flags = 0; |
| sigaction (sig, &sigact, NULL); |
| fprintf(stderr, "Interrupted by signal,"); |
| print_stats(0); |
| kill (getpid (), sig); |
| } |
| |
| static void siginfo_handler(int sig) |
| { |
| fprintf(stderr, "Progress report, continuing ...\n"); |
| print_stats(0); |
| } |
| |
| int dd_filetype(const char * filename) |
| { |
| struct stat st; |
| |
| if (stat(filename, &st) < 0) |
| return FT_OTHER; |
| if (S_ISCHR(st.st_mode)) { |
| if (RAW_MAJOR == major(st.st_rdev)) |
| return FT_RAW; |
| else if (SCSI_GENERIC_MAJOR == major(st.st_rdev)) |
| return FT_SG; |
| } |
| return FT_OTHER; |
| } |
| |
| void usage() |
| { |
| fprintf(stderr, "Usage: " |
| "sg_read if=<infile> [skip=<num>] [bs=<num>] [bpt=<num>] " |
| "count=<num>\n" |
| " [dio=<num>] [mmap=<num>] [time=<num>]" |
| " [cdbsz=<6|10|12|16>]\n" |
| " 'if' is an sg or raw device, or a seekable file (not stdin)\n" |
| " 'bs' must match sector size (when 'if' is sg device) " |
| "(def=512)\n" |
| " 'skip' each transfer starts at this logical address (def=0)\n" |
| " 'count' total bytes read will be 'bs'*'count' (if no error)\n" |
| " 'bpt' is blocks_per_transfer (default is 128, or 64KB for " |
| "def 'bs')\n" |
| " 'dio' is direct IO, 1->attempt, 0->indirect IO (def)\n" |
| " 'mmap' is mmap-ed IO, 1->perform, 0->indirect IO (def)\n" |
| " 'time' 0->do nothing(def), 1->time from 1st cmd, 2->time " |
| "from 2nd cmd\n" |
| " 'cdbsz' size of SCSI READ command (default is 10)\n"); |
| fprintf(stderr, "\nVersion: %s\n", version_str); |
| } |
| |
| int sg_build_scsi_cdb(unsigned char * cdbp, int cdb_sz, unsigned int blocks, |
| unsigned int start_block) |
| { |
| int rd_opcode[] = {0x8, 0x28, 0xa8, 0x88}; |
| int sz_ind; |
| |
| memset(cdbp, 0, cdb_sz); |
| switch (cdb_sz) { |
| case 6: |
| sz_ind = 0; |
| cdbp[0] = (unsigned char)rd_opcode[sz_ind]; |
| cdbp[1] |= (unsigned char)((start_block >> 16) & 0x1f); |
| cdbp[2] = (unsigned char)((start_block >> 8) & 0xff); |
| cdbp[3] = (unsigned char)(start_block & 0xff); |
| cdbp[4] = (256 == blocks) ? 0 : (unsigned char)blocks; |
| if (blocks > 256) { |
| fprintf(stderr, ME "for 6 byte commands, maximum number of " |
| "blocks is 256\n"); |
| return 1; |
| } |
| if ((start_block + blocks - 1) & (~0x1fffff)) { |
| fprintf(stderr, ME "for 6 byte commands, can't address blocks" |
| " beyond %d\n", 0x1fffff); |
| return 1; |
| } |
| break; |
| case 10: |
| sz_ind = 1; |
| cdbp[0] = (unsigned char)rd_opcode[sz_ind]; |
| cdbp[2] = (unsigned char)((start_block >> 24) & 0xff); |
| cdbp[3] = (unsigned char)((start_block >> 16) & 0xff); |
| cdbp[4] = (unsigned char)((start_block >> 8) & 0xff); |
| cdbp[5] = (unsigned char)(start_block & 0xff); |
| cdbp[7] = (unsigned char)((blocks >> 8) & 0xff); |
| cdbp[8] = (unsigned char)(blocks & 0xff); |
| if (blocks & (~0xffff)) { |
| fprintf(stderr, ME "for 10 byte commands, maximum number of " |
| "blocks is %d\n", 0xffff); |
| return 1; |
| } |
| break; |
| case 12: |
| sz_ind = 2; |
| cdbp[0] = (unsigned char)rd_opcode[sz_ind]; |
| cdbp[2] = (unsigned char)((start_block >> 24) & 0xff); |
| cdbp[3] = (unsigned char)((start_block >> 16) & 0xff); |
| cdbp[4] = (unsigned char)((start_block >> 8) & 0xff); |
| cdbp[5] = (unsigned char)(start_block & 0xff); |
| cdbp[6] = (unsigned char)((blocks >> 24) & 0xff); |
| cdbp[7] = (unsigned char)((blocks >> 16) & 0xff); |
| cdbp[8] = (unsigned char)((blocks >> 8) & 0xff); |
| cdbp[9] = (unsigned char)(blocks & 0xff); |
| break; |
| case 16: |
| sz_ind = 3; |
| cdbp[0] = (unsigned char)rd_opcode[sz_ind]; |
| /* can't cope with block number > 32 bits (yet) */ |
| cdbp[6] = (unsigned char)((start_block >> 24) & 0xff); |
| cdbp[7] = (unsigned char)((start_block >> 16) & 0xff); |
| cdbp[8] = (unsigned char)((start_block >> 8) & 0xff); |
| cdbp[9] = (unsigned char)(start_block & 0xff); |
| cdbp[10] = (unsigned char)((blocks >> 24) & 0xff); |
| cdbp[11] = (unsigned char)((blocks >> 16) & 0xff); |
| cdbp[12] = (unsigned char)((blocks >> 8) & 0xff); |
| cdbp[13] = (unsigned char)(blocks & 0xff); |
| break; |
| default: |
| fprintf(stderr, ME "expected cdb size of 6, 10, 12, or 16 but got" |
| "=%d\n", cdb_sz); |
| return 1; |
| } |
| return 0; |
| } |
| |
| /* -1 -> unrecoverable error, 0 -> successful, 1 -> recoverable (ENOMEM), |
| 2 -> try again */ |
| int sg_bread(int sg_fd, unsigned char * buff, int blocks, int from_block, |
| int bs, int cdbsz, int * diop, int do_mmap) |
| { |
| unsigned char rdCmd[MAX_SCSI_CDBSZ]; |
| unsigned char senseBuff[SENSE_BUFF_LEN]; |
| sg_io_hdr_t io_hdr; |
| |
| if (sg_build_scsi_cdb(rdCmd, cdbsz, blocks, from_block)) { |
| fprintf(stderr, ME "bad cdb build, from_block=%d, blocks=%d\n", |
| from_block, blocks); |
| return -1; |
| } |
| memset(&io_hdr, 0, sizeof(sg_io_hdr_t)); |
| io_hdr.interface_id = 'S'; |
| io_hdr.cmd_len = cdbsz; |
| io_hdr.cmdp = rdCmd; |
| io_hdr.dxfer_direction = SG_DXFER_FROM_DEV; |
| io_hdr.dxfer_len = bs * blocks; |
| if (! do_mmap) /* not required: shows dxferp unused during mmap-ed IO */ |
| io_hdr.dxferp = buff; |
| io_hdr.mx_sb_len = SENSE_BUFF_LEN; |
| io_hdr.sbp = senseBuff; |
| io_hdr.timeout = DEF_TIMEOUT; |
| io_hdr.pack_id = pack_id_count++; |
| if (diop && *diop) |
| io_hdr.flags |= SG_FLAG_DIRECT_IO; |
| else if (do_mmap) |
| io_hdr.flags |= SG_FLAG_MMAP_IO; |
| |
| if (ioctl(sg_fd, SG_IO, &io_hdr) < 0) { |
| if (ENOMEM == errno) |
| return 1; |
| perror("reading (SG_IO) on sg device, error"); |
| return -1; |
| } |
| |
| switch (sg_err_category3(&io_hdr)) { |
| case SG_ERR_CAT_CLEAN: |
| break; |
| case SG_ERR_CAT_RECOVERED: |
| fprintf(stderr, "Recovered error while reading block=%d, num=%d\n", |
| from_block, blocks); |
| break; |
| case SG_ERR_CAT_MEDIA_CHANGED: |
| return 2; |
| default: |
| sg_chk_n_print3("reading", &io_hdr); |
| return -1; |
| } |
| if (diop && *diop && |
| ((io_hdr.info & SG_INFO_DIRECT_IO_MASK) != SG_INFO_DIRECT_IO)) |
| *diop = 0; /* flag that dio not done (completely) */ |
| sum_of_resids += io_hdr.resid; |
| #if SG_DEBUG |
| fprintf(stderr, "duration=%u ms\n", io_hdr.duration); |
| #endif |
| return 0; |
| } |
| |
| int get_num(char * buf) |
| { |
| int res, num; |
| char c; |
| |
| res = sscanf(buf, "%d%c", &num, &c); |
| if (0 == res) |
| return -1; |
| else if (1 == res) |
| return num; |
| else { |
| switch (c) { |
| case 'c': |
| case 'C': |
| return num; |
| case 'b': |
| case 'B': |
| return num * 512; |
| case 'k': |
| return num * 1024; |
| case 'K': |
| return num * 1000; |
| case 'm': |
| return num * 1024 * 1024; |
| case 'M': |
| return num * 1000000; |
| case 'g': |
| return num * 1024 * 1024 * 1024; |
| case 'G': |
| return num * 1000000000; |
| default: |
| fprintf(stderr, "unrecognized multiplier\n"); |
| return -1; |
| } |
| } |
| } |
| |
| #define STR_SZ 1024 |
| #define INF_SZ 512 |
| #define EBUFF_SZ 512 |
| |
| |
| int main(int argc, char * argv[]) |
| { |
| int skip = 0; |
| int bs = 0; |
| int bpt = DEF_BLOCKS_PER_TRANSFER; |
| char str[STR_SZ]; |
| char * key; |
| char * buf; |
| char inf[INF_SZ]; |
| int in_type = FT_OTHER; |
| int do_dio = 0; |
| int do_mmap = 0; |
| int do_time = 0; |
| int scsi_cdbsz = DEF_SCSI_CDBSZ; |
| int dio_incomplete = 0; |
| int res, k, t, buf_sz, dio_tmp, iters, orig_count; |
| int infd, blocks; |
| unsigned char * wrkBuff = NULL; |
| unsigned char * wrkPos; |
| char ebuff[EBUFF_SZ]; |
| int blocks_per; |
| struct timeval start_tm, end_tm; |
| size_t psz = getpagesize(); |
| |
| inf[0] = '\0'; |
| if (argc < 3) { |
| fprintf(stderr, "'if' and 'count' arguments must be given\n"); |
| usage(); |
| return 1; |
| } |
| |
| for(k = 1; k < argc; k++) { |
| if (argv[k]) { |
| strncpy(str, argv[k], STR_SZ); |
| str[STR_SZ - 1] = '\0'; |
| } |
| else |
| continue; |
| for(key = str, buf = key; *buf && *buf != '=';) |
| buf++; |
| if (*buf) |
| *buf++ = '\0'; |
| if (strcmp(key,"if") == 0) |
| strncpy(inf, buf, INF_SZ); |
| else if (0 == strcmp(key,"bs")) |
| bs = get_num(buf); |
| else if (0 == strcmp(key,"bpt")) |
| bpt = get_num(buf); |
| else if (0 == strcmp(key,"skip")) |
| skip = get_num(buf); |
| else if (0 == strcmp(key,"count")) |
| dd_count = get_num(buf); |
| else if (0 == strcmp(key,"dio")) |
| do_dio = get_num(buf); |
| else if (0 == strcmp(key,"mmap")) |
| do_mmap = get_num(buf); |
| else if (0 == strcmp(key,"time")) |
| do_time = get_num(buf); |
| else if (0 == strcmp(key,"cdbsz")) |
| scsi_cdbsz = get_num(buf); |
| else { |
| fprintf(stderr, "Unrecognized argument '%s'\n", key); |
| usage(); |
| return 1; |
| } |
| } |
| if (bs <= 0) { |
| bs = DEF_BLOCK_SIZE; |
| fprintf(stderr, "Assume default 'bs' (block size) of %d bytes\n", bs); |
| } |
| if (dd_count < 0) { |
| fprintf(stderr, "'count' must be given\n"); |
| usage(); |
| return 1; |
| } |
| if (skip < 0) { |
| fprintf(stderr, "skip cannot be negative\n"); |
| return 1; |
| } |
| if (do_dio && do_mmap) { |
| fprintf(stderr, "cannot select both dio and mmap\n"); |
| return 1; |
| } |
| |
| #ifdef SG_DEBUG |
| fprintf(stderr, ME "if=%s skip=%d count=%d\n", inf, skip, dd_count); |
| #endif |
| install_handler (SIGINT, interrupt_handler); |
| install_handler (SIGQUIT, interrupt_handler); |
| install_handler (SIGPIPE, interrupt_handler); |
| install_handler (SIGUSR1, siginfo_handler); |
| |
| if (! inf[0]) { |
| fprintf(stderr, "must provide 'if=<filename>'\n"); |
| usage(); |
| return 1; |
| } |
| in_type = dd_filetype(inf); |
| |
| if (FT_SG == in_type) { |
| if ((infd = open(inf, O_RDWR)) < 0) { |
| snprintf(ebuff, EBUFF_SZ, |
| ME "could not open %s for sg reading", inf); |
| perror(ebuff); |
| return 1; |
| } |
| t = bs * bpt; |
| if ((do_mmap) && (0 != (t % psz))) |
| t = ((t / psz) + 1) * psz; /* round up to next pagesize */ |
| res = ioctl(infd, SG_SET_RESERVED_SIZE, &t); |
| if (res < 0) |
| perror(ME "SG_SET_RESERVED_SIZE error"); |
| res = ioctl(infd, SG_GET_VERSION_NUM, &t); |
| if ((res < 0) || (t < 30000)) { |
| fprintf(stderr, ME "sg driver prior to 3.x.y\n"); |
| return 1; |
| } |
| if (do_mmap && (t < 30122)) { |
| fprintf(stderr, ME "mmap-ed IO needs a sg driver version " |
| ">= 3.1.22\n"); |
| return 1; |
| } |
| } |
| else { |
| if (do_mmap) { |
| fprintf(stderr, ME "mmap-ed IO only support on sg " |
| "devices\n"); |
| return 1; |
| } |
| if ((infd = open(inf, O_RDONLY)) < 0) { |
| snprintf(ebuff, EBUFF_SZ, |
| ME "could not open %s for reading", inf); |
| perror(ebuff); |
| return 1; |
| } |
| else if (skip > 0) { |
| llse_loff_t offset = skip; |
| |
| offset *= bs; /* could exceed 32 bits here! */ |
| if (llse_llseek(infd, offset, SEEK_SET) < 0) { |
| snprintf(ebuff, EBUFF_SZ, |
| ME "couldn't skip to required position on %s", inf); |
| perror(ebuff); |
| return 1; |
| } |
| } |
| } |
| |
| if (0 == dd_count) |
| return 0; |
| orig_count = dd_count; |
| |
| if (do_dio || (FT_RAW == in_type)) { |
| wrkBuff = malloc(bs * bpt + psz); |
| if (0 == wrkBuff) { |
| fprintf(stderr, "Not enough user memory for raw\n"); |
| return 1; |
| } |
| wrkPos = (unsigned char *)(((unsigned long)wrkBuff + psz - 1) & |
| (~(psz - 1))); |
| } |
| else if (do_mmap) { |
| wrkPos = mmap(NULL, bs * bpt, PROT_READ | PROT_WRITE, |
| MAP_SHARED, infd, 0); |
| if (MAP_FAILED == wrkPos) { |
| perror(ME "error from mmap()"); |
| return 1; |
| } |
| } |
| else { |
| wrkBuff = malloc(bs * bpt); |
| if (0 == wrkBuff) { |
| fprintf(stderr, "Not enough user memory\n"); |
| return 1; |
| } |
| wrkPos = wrkBuff; |
| } |
| |
| blocks_per = bpt; |
| #ifdef SG_DEBUG |
| fprintf(stderr, "Start of loop, count=%d, blocks_per=%d\n", |
| dd_count, blocks_per); |
| #endif |
| start_tm.tv_sec = 0; /* just in case start set condition not met */ |
| start_tm.tv_usec = 0; |
| |
| /* main loop */ |
| for (iters = 0; dd_count > 0; ++iters) { |
| if ((do_time > 0) && (iters == (do_time - 1))) |
| gettimeofday(&start_tm, NULL); |
| blocks = (dd_count > blocks_per) ? blocks_per : dd_count; |
| if (FT_SG == in_type) { |
| dio_tmp = do_dio; |
| res = sg_bread(infd, wrkPos, blocks, skip, bs, scsi_cdbsz, |
| &dio_tmp, do_mmap); |
| if (1 == res) { /* ENOMEM, find what's available+try that */ |
| if (ioctl(infd, SG_GET_RESERVED_SIZE, &buf_sz) < 0) { |
| perror("RESERVED_SIZE ioctls failed"); |
| break; |
| } |
| blocks_per = (buf_sz + bs - 1) / bs; |
| blocks = blocks_per; |
| fprintf(stderr, |
| "Reducing read to %d blocks per loop\n", blocks_per); |
| res = sg_bread(infd, wrkPos, blocks, skip, bs, scsi_cdbsz, |
| &dio_tmp, do_mmap); |
| } |
| else if (2 == res) { |
| fprintf(stderr, |
| "Unit attention, media changed, continuing (r)\n"); |
| res = sg_bread(infd, wrkPos, blocks, skip, bs, scsi_cdbsz, |
| &dio_tmp, do_mmap); |
| } |
| if (0 != res) { |
| fprintf(stderr, ME "failed, skip=%d\n", skip); |
| break; |
| } |
| else { |
| in_full += blocks; |
| if (do_dio && (0 == dio_tmp)) |
| dio_incomplete++; |
| } |
| } |
| else { |
| if (iters > 0) { /* subsequent iteration reset skip position */ |
| llse_loff_t offset = skip; |
| |
| offset *= bs; /* could exceed 32 bits here! */ |
| if (llse_llseek(infd, offset, SEEK_SET) < 0) { |
| perror(ME "could not reset skip position"); |
| break; |
| } |
| } |
| while (((res = read(infd, wrkPos, blocks * bs)) < 0) && |
| (EINTR == errno)) |
| ; |
| if (res < 0) { |
| snprintf(ebuff, EBUFF_SZ, ME "reading, skip=%d ", skip); |
| perror(ebuff); |
| break; |
| } |
| else if (res < blocks * bs) { |
| fprintf(stderr, ME "short read: wanted/got=%d/%d bytes" |
| ", stop\n", blocks * bs, res); |
| blocks = res / bs; |
| if ((res % bs) > 0) { |
| blocks++; |
| in_partial++; |
| } |
| dd_count -= blocks; |
| in_full += blocks; |
| break; |
| } |
| in_full += blocks; |
| } |
| if (dd_count > 0) |
| dd_count -= blocks; |
| } |
| if (do_time > 0) { |
| gettimeofday(&end_tm, NULL); |
| if (start_tm.tv_sec || start_tm.tv_usec) { |
| struct timeval res_tm; |
| double a, b, c; |
| |
| res_tm.tv_sec = end_tm.tv_sec - start_tm.tv_sec; |
| res_tm.tv_usec = end_tm.tv_usec - start_tm.tv_usec; |
| if (res_tm.tv_usec < 0) { |
| --res_tm.tv_sec; |
| res_tm.tv_usec += 1000000; |
| } |
| a = res_tm.tv_sec; |
| a += (0.000001 * res_tm.tv_usec); |
| b = (double)bs * (orig_count - dd_count); |
| if (do_time > 1) |
| c = b - ((double)bs * ((do_time - 1.0) * bpt)); |
| else |
| c = 0.0; |
| |
| if (1 == do_time) { |
| fprintf(stderr, "time for all (SCSI) commands was " |
| "%d.%06d secs", (int)res_tm.tv_sec, (int)res_tm.tv_usec); |
| if ((a > 0.00001) && (b > 511)) |
| fprintf(stderr, ", %.2f MB/sec\n", b / (a * 1000000.0)); |
| else |
| fprintf(stderr, "\n"); |
| } |
| else if (2 == do_time) { |
| fprintf(stderr, "time from second (SCSI) command to end " |
| "was %d.%06d secs", (int)res_tm.tv_sec, |
| (int)res_tm.tv_usec); |
| if ((a > 0.00001) && (c > 511)) |
| fprintf(stderr, ", %.2f MB/sec\n", c / (a * 1000000.0)); |
| else |
| fprintf(stderr, "\n"); |
| } |
| else { |
| fprintf(stderr, "time from start of (SCSI) command " |
| "#%d to end was %d.%06d secs", do_time, |
| (int)res_tm.tv_sec, (int)res_tm.tv_usec); |
| if ((a > 0.00001) && (c > 511)) |
| fprintf(stderr, ", %.2f MB/sec\n", c / (a * 1000000.0)); |
| else |
| fprintf(stderr, "\n"); |
| } |
| } |
| } |
| |
| if (wrkBuff) |
| free(wrkBuff); |
| |
| close(infd); |
| res = 0; |
| if (0 != dd_count) { |
| fprintf(stderr, "Some error occurred,"); |
| res = 2; |
| } |
| if (FT_SG == in_type) |
| print_stats(iters); |
| else |
| print_stats(0); |
| if (dio_incomplete) { |
| int fd; |
| char c; |
| |
| fprintf(stderr, ">> Direct IO requested but incomplete %d times\n", |
| dio_incomplete); |
| if ((fd = open(proc_allow_dio, O_RDONLY)) >= 0) { |
| if (1 == read(fd, &c, 1)) { |
| if ('0' == c) |
| fprintf(stderr, ">>> %s set to '0' but should be set " |
| "to '1' for direct IO\n", proc_allow_dio); |
| } |
| close(fd); |
| } |
| } |
| if (sum_of_resids) |
| fprintf(stderr, ">> Non-zero sum of residual counts=%d\n", |
| sum_of_resids); |
| return res; |
| } |
