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Commit 32e8f76

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Ex 14-1 completed.
1 parent 8fcb598 commit 32e8f76

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2 files changed

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2 files changed

+99
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‎14_File_Systems/README.md‎

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Original file line numberDiff line numberDiff line change
@@ -7,6 +7,32 @@ To build the solution, run `make ex14_1`.
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The command options are:
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1. __-n__ number of files to create
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1. __-r__ delete files in descending order of creation
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1. __-s__ create files in sequential order
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1. __-v__ - shows more detailed output
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1. mount point of target file system
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1. target directory
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Statistics collected:
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1. File system type
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1. Create files in random (r) or sequential (s) order
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1. Number of files created
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1. Wall clock time in seconds
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1. User time in seconds
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1. System time in seconds
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Sample run with random order of creation:
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```bash
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time ./ex14_1 -n 1000 test
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0x03E706FF r 1000 2.859000 0.109000 2.750000
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real 0m 5.12s
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user 0m 0.25s
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sys 0m 4.45s
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```
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Sample run with sequential order of creation:
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```bash
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time ./ex14_1 -sn 1000 test
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0x03E706FF s 1000 2.547000 0.078000 2.469000
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real 0m 4.35s
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user 0m 0.21s
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sys 0m 3.96s
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```

‎14_File_Systems/ex14_1.c‎

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Original file line numberDiff line numberDiff line change
@@ -11,10 +11,12 @@
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#include <error.h>
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#include <fcntl.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/statfs.h>
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#include <sys/times.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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/* --------------------------------------------------------------------------
@@ -149,11 +151,79 @@ int main(int argc, char *argv[])
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fprintf(stderr, "FS free i-nodes : %ld\n", (long)fs_info.f_ffree);
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}
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/* ----------------------------------------------------------------------
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| Start collecting timing information
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* ---------------------------------------------------------------------- */
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long clockTicks = sysconf(_SC_CLK_TCK); /* Clocks per tick for conversion */
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struct tms start_t;
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clock_t start_clockTime = clock();
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if (clockTicks == -1)
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{
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fprintf(stderr, "sysconf(_SC_CLK_TCK) failed: %m\n");
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exit(EXIT_FAILURE);
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}
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if (start_clockTime == -1)
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{
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fprintf(stderr, "clock() failed: %m\n");
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exit(EXIT_FAILURE);
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}
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if (times(&start_t) == -1)
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{
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fprintf(stderr, "times() failed: %m\n");
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exit(EXIT_FAILURE);
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}
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/* ----------------------------------------------------------------------
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| Create the requested number of files
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* ---------------------------------------------------------------------- */
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if (random_creation) {
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srandom(start_clockTime);
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}
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for (int i = 0; i < num_files_required; i++)
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{
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long file_num = random_creation ? random() % 1000000 : i;
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create_file(output_dir_name, file_num, verbosity);
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}
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/*------------------------------------------------------------------------*\
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| Print statistics for later analysis |
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| 1. File system type |
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| 2. Create files in random order? |
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| 3. Number of files created |
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| 4. Wall clock time in seconds |
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| 5. User time in seconds |
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| 6. System time in seconds |
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\*------------------------------------------------------------------------*/
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struct tms end_t;
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clock_t end_clockTime = clock();
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if (end_clockTime == -1)
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{
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fprintf(stderr, "clock() failed: %m\n");
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exit(EXIT_FAILURE);
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}
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if (times(&end_t) == -1)
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{
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fprintf(stderr, "times() failed: %m\n");
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exit(EXIT_FAILURE);
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}
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printf("0x%08lX\t%c\t%ld\t%.6f\t%.6f\t%.6f\n",
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(long)fs_info.f_type,
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(random_creation) ? 'r' : 's',
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num_files_required,
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(double) (end_clockTime - start_clockTime) / CLOCKS_PER_SEC,
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(double) (end_t.tms_utime - start_t.tms_utime) / clockTicks,
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(double) (end_t.tms_stime - start_t.tms_stime) / clockTicks
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);
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/* ----------------------------------------------------------------------
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| Delete all files in the directory
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* ---------------------------------------------------------------------- */
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char cmd[1024];
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sprintf(cmd, "find %s -type f -delete", output_dir_name);

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