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authorGravatar Denis Vlasenko <vda.linux@googlemail.com>2007-05-22 21:46:11 +0000
committerGravatar Denis Vlasenko <vda.linux@googlemail.com>2007-05-22 21:46:11 +0000
commit6963eb53a1cee489418935b7f019f52474fde0f4 (patch)
tree361baf533faf6e73043d1b5b639d215a2060af8a /miscutils/hdparm.c
parent06810339189c1372d3defb8e3dcdb58a07ade7a7 (diff)
downloadbusybox-6963eb53a1cee489418935b7f019f52474fde0f4.tar.gz
busybox-6963eb53a1cee489418935b7f019f52474fde0f4.tar.bz2
hdparm: make -T -t code smaller (-194 bytes), and output prettier
Diffstat (limited to 'miscutils/hdparm.c')
-rw-r--r--miscutils/hdparm.c172
1 files changed, 75 insertions, 97 deletions
diff --git a/miscutils/hdparm.c b/miscutils/hdparm.c
index c540ff93c..0a689d87e 100644
--- a/miscutils/hdparm.c
+++ b/miscutils/hdparm.c
@@ -393,26 +393,26 @@ void identify_from_stdin(void);
*/
/* words 89, 90, SECU ERASE TIME */
-#define ERASE_BITS 0x00ff
+#define ERASE_BITS 0x00ff
/* word 92: master password revision */
/* NOVAL_0 or NOVAL_1 means no support for master password revision */
/* word 93: hw reset result */
-#define CBLID 0x2000 /* CBLID status */
-#define RST0 0x0001 /* 1=reset to device #0 */
-#define DEV_DET 0x0006 /* how device num determined */
-#define JUMPER_VAL 0x0002 /* device num determined by jumper */
-#define CSEL_VAL 0x0004 /* device num determined by CSEL_VAL */
+#define CBLID 0x2000 /* CBLID status */
+#define RST0 0x0001 /* 1=reset to device #0 */
+#define DEV_DET 0x0006 /* how device num determined */
+#define JUMPER_VAL 0x0002 /* device num determined by jumper */
+#define CSEL_VAL 0x0004 /* device num determined by CSEL_VAL */
/* word 127: removable media status notification feature set support */
-#define RM_STAT_BITS 0x0003
-#define RM_STAT_SUP 0x0001
+#define RM_STAT_BITS 0x0003
+#define RM_STAT_SUP 0x0001
/* word 128: security */
-#define SECU_ENABLED 0x0002
-#define SECU_LEVEL 0x0010
-#define NUM_SECU_STR 6
+#define SECU_ENABLED 0x0002
+#define SECU_LEVEL 0x0010
+#define NUM_SECU_STR 6
#if ENABLE_FEATURE_HDPARM_GET_IDENTITY
static const char * const secu_str[] = {
"supported", /* word 128, bit 0 */
@@ -425,22 +425,21 @@ static const char * const secu_str[] = {
#endif
/* word 160: CFA power mode */
-#define VALID_W160 0x8000 /* 1=word valid */
-#define PWR_MODE_REQ 0x2000 /* 1=CFA power mode req'd by some cmds*/
-#define PWR_MODE_OFF 0x1000 /* 1=CFA power moded disabled */
-#define MAX_AMPS 0x0fff /* value = max current in ma */
+#define VALID_W160 0x8000 /* 1=word valid */
+#define PWR_MODE_REQ 0x2000 /* 1=CFA power mode req'd by some cmds*/
+#define PWR_MODE_OFF 0x1000 /* 1=CFA power moded disabled */
+#define MAX_AMPS 0x0fff /* value = max current in ma */
/* word 255: integrity */
-#define SIG 0x00ff /* signature location */
-#define SIG_VAL 0x00A5 /* signature value */
+#define SIG 0x00ff /* signature location */
+#define SIG_VAL 0x00a5 /* signature value */
-#define TIMING_MB 64
-#define TIMING_BUF_MB 1
-#define TIMING_BUF_BYTES (TIMING_BUF_MB * 1024 * 1024)
-#define TIMING_BUF_COUNT (timing_MB / TIMING_BUF_MB)
-#define BUFCACHE_FACTOR 2
+#define TIMING_MB 64
+#define TIMING_BUF_MB 1
+#define TIMING_BUF_BYTES (TIMING_BUF_MB * 1024 * 1024)
+#define BUFCACHE_FACTOR 2
-#undef DO_FLUSHCACHE /* under construction: force cache flush on -W0 */
+#undef DO_FLUSHCACHE /* under construction: force cache flush on -W0 */
/* Busybox messages and functions */
static int bb_ioctl(int fd, int request, void *argp, const char *string)
@@ -775,7 +774,7 @@ static void identify(uint16_t *id_supplied)
bbbig = (uint64_t)val[LBA_64_MSB] << 48 |
(uint64_t)val[LBA_48_MSB] << 32 |
(uint64_t)val[LBA_MID] << 16 |
- val[LBA_LSB] ;
+ val[LBA_LSB];
printf("\tLBA48 user addressable sectors:%11"PRIu64"\n", bbbig);
}
@@ -916,7 +915,7 @@ static void identify(uint16_t *id_supplied)
* than n (e.g. 3, 2, 1 and 0). Print all the modes. */
if ((val[WHATS_VALID] & OK_W64_70) && (val[ADV_PIO_MODES] & PIO_SUP)) {
jj = ((val[ADV_PIO_MODES] & PIO_SUP) << 3) | 0x0007;
- for (ii = 0; ii <= PIO_MODE_MAX ; ii++) {
+ for (ii = 0; ii <= PIO_MODE_MAX; ii++) {
if (jj & 0x0001) printf("pio%d ", ii);
jj >>=1;
}
@@ -1246,7 +1245,7 @@ static void dump_identity(const struct hd_driveid *id)
static void flush_buffer_cache(int fd)
{
fsync(fd); /* flush buffers */
- bb_ioctl(fd, BLKFLSBUF, NULL, "BLKFLSBUF") ;/* do it again, big time */
+ bb_ioctl(fd, BLKFLSBUF, NULL, "BLKFLSBUF"); /* do it again, big time */
#ifdef HDIO_DRIVE_CMD
sleep(1);
if (ioctl(fd, HDIO_DRIVE_CMD, NULL) && errno != EINVAL) /* await completion */
@@ -1276,14 +1275,6 @@ static int read_big_block(int fd, char *buf)
return 0;
}
-static void print_timing(int t, double e)
-{
- if (t >= e) /* more than 1MB/s */
- printf("%2d MB in %5.2f seconds =%6.2f %cB/sec\n", t, e, t / e, 'M');
- else
- printf("%2d MB in %5.2f seconds =%6.2f %cB/sec\n", t, e, t / e * 1024, 'k');
-}
-
static int do_blkgetsize(int fd, unsigned long long *blksize64)
{
int rc;
@@ -1300,17 +1291,22 @@ static int do_blkgetsize(int fd, unsigned long long *blksize64)
return rc;
}
+static void print_timing(unsigned t, double e)
+{
+ if (t >= e) /* more than 1MB/s */
+ printf("%4d MB in %.2f seconds = %.2f %cB/sec\n", t, e, t / e, 'M');
+ else
+ printf("%4d MB in %.2f seconds = %.2f %cB/sec\n", t, e, t / e * 1024, 'k');
+}
+
static void do_time(int flag, int fd)
-/*
- flag = 0 time_cache
- flag = 1 time_device
-*/
+/* flag = 0 time_cache, 1 time_device */
{
static const struct itimerval thousand = {{1000, 0}, {1000, 0}};
- struct itimerval e1, e2;
- double elapsed, elapsed2;
- unsigned max_iterations = 1024, total_MB, iterations;
+ struct itimerval itv;
+ unsigned elapsed, elapsed2;
+ unsigned max_iterations, total_MB, iterations;
unsigned long long blksize;
RESERVE_CONFIG_BUFFER(buf, TIMING_BUF_BYTES);
@@ -1319,78 +1315,60 @@ static void do_time(int flag, int fd)
goto quit2;
}
+ max_iterations = 1024;
if (0 == do_blkgetsize(fd, &blksize)) {
max_iterations = blksize / (2 * 1024) / TIMING_BUF_MB;
}
/* Clear out the device request queues & give them time to complete */
sync();
- sleep(3);
-
+ sleep(2);
+ if (flag == 0) { /* Time cache */
+ if (seek_to_zero(fd))
+ goto quit;
+ if (read_big_block(fd, buf))
+ goto quit;
+ printf(" Timing buffer-cache reads: ");
+ } else { /* Time device */
+ printf(" Timing buffered disk reads: ");
+ }
+ fflush(stdout);
+ iterations = 0;
+ /*
+ * getitimer() is used rather than gettimeofday() because
+ * it is much more consistent (on my machine, at least).
+ */
setitimer(ITIMER_REAL, &thousand, NULL);
-
- if (flag == 0) {
- /* Time cache */
-
- if (seek_to_zero(fd)) return;
- if (read_big_block(fd, buf)) return;
- printf(" Timing cached reads: ");
- fflush(stdout);
-
- /* Now do the timing */
- iterations = 0;
- getitimer(ITIMER_REAL, &e1);
- do {
- ++iterations;
- if (seek_to_zero(fd) || read_big_block(fd, buf))
- goto quit;
- getitimer(ITIMER_REAL, &e2);
- elapsed = (e1.it_value.tv_sec - e2.it_value.tv_sec)
- + ((e1.it_value.tv_usec - e2.it_value.tv_usec) / 1000000.0);
- } while (elapsed < 2.0);
- total_MB = iterations * TIMING_BUF_MB;
-
+ /* Now do the timing */
+ do {
+ ++iterations;
+ if ((flag == 0) && seek_to_zero(fd))
+ goto quit;
+ if (read_big_block(fd, buf))
+ goto quit;
+ getitimer(ITIMER_REAL, &itv);
+ elapsed = (1000 - itv.it_value.tv_sec) * 1000000
+ - itv.it_value.tv_usec;
+ } while (elapsed < 3000000 && iterations < max_iterations);
+ total_MB = iterations * TIMING_BUF_MB;
+ if (flag == 0) {
/* Now remove the lseek() and getitimer() overheads from the elapsed time */
- getitimer(ITIMER_REAL, &e1);
+ setitimer(ITIMER_REAL, &thousand, NULL);
do {
if (seek_to_zero(fd))
goto quit;
- getitimer(ITIMER_REAL, &e2);
- elapsed2 = (e1.it_value.tv_sec - e2.it_value.tv_sec)
- + ((e1.it_value.tv_usec - e2.it_value.tv_usec) / 1000000.0);
+ getitimer(ITIMER_REAL, &itv);
+ elapsed2 = (1000 - itv.it_value.tv_sec) * 1000000
+ - itv.it_value.tv_usec;
} while (--iterations);
-
elapsed -= elapsed2;
- print_timing(BUFCACHE_FACTOR * total_MB, elapsed);
+ total_MB *= BUFCACHE_FACTOR;
flush_buffer_cache(fd);
- sleep(1);
- } else {
- /* Time device */
-
- printf(" Timing buffered disk reads: ");
- fflush(stdout);
- /*
- * getitimer() is used rather than gettimeofday() because
- * it is much more consistent (on my machine, at least).
- */
- /* Now do the timings for real */
- iterations = 0;
- getitimer(ITIMER_REAL, &e1);
- do {
- ++iterations;
- if (read_big_block(fd, buf))
- goto quit;
- getitimer(ITIMER_REAL, &e2);
- elapsed = (e1.it_value.tv_sec - e2.it_value.tv_sec)
- + ((e1.it_value.tv_usec - e2.it_value.tv_usec) / 1000000.0);
- } while (elapsed < 3.0 && iterations < max_iterations);
-
- total_MB = iterations * TIMING_BUF_MB;
- print_timing(total_MB, elapsed);
}
-quit:
+ print_timing(total_MB, elapsed / 1000000.0);
+ quit:
munlock(buf, TIMING_BUF_BYTES);
-quit2:
+ quit2:
RELEASE_CONFIG_BUFFER(buf);
}