* Re: Tuning XFS for real time audio on a laptop with encrypted LVM
2010-05-21 13:45 ` Stan Hoeppner
@ 2010-05-22 12:21 ` Pedro Ribeiro
2010-05-22 22:13 ` Stan Hoeppner
0 siblings, 1 reply; 9+ messages in thread
From: Pedro Ribeiro @ 2010-05-22 12:21 UTC (permalink / raw)
To: Stan Hoeppner; +Cc: xfs
[-- Attachment #1: Type: text/plain, Size: 8448 bytes --]
On 21 May 2010 14:45, Stan Hoeppner <stan@hardwarefreak.com> wrote:
> Pedro Ribeiro put forth on 5/21/2010 6:29 AM:
>
>> So it is agreed that CFQ sucks right now. I'll continue my testing but
>> now with proper daily use to see which is better, deadline or noop.
>
> I'd be curious to see what your seek performance is with each elevator on that laptop drive. Give this basic parallel seek tester a spin.
>
> Make runs with 1, 8, 16, 32, and 64 threads to find peak seek throughput and number of threads required to reach it. Each run takes about 30 seconds. For 7.2k rpm and up mechanical drives and SSDs you'd want to test 128 and 256 threads also. Due to the threaded nature good command queuing will have a substantial effect on results, as will elevator choice on some systems. For background info and evolution of this code, see this thread: http://www.linuxinsight.com/how_fast_is_your_disk.html
>
> compile with:
> gcc -o seeker_baryluk -O2 -march=native seeker_baryluk.c -pthread
>
> run command:
> ./seeker_baryluk device number_of_threads
>
> A nice feature is that you can test an entire drive or individual partitions (or an entire SAN LUN or just partitions on said LUN). This can tell you how much slower inner cylinders are compared to outer cylinders, and even works for local RAID and SAN LUNs.
>
> ./seeker_baryluk /dev/sda 64
> ./seeker_baryluk /dev/sda2 64
> ...
> ./seeker_baryluk /dev/sda9 64
>
> I find this a much more informative simple test of storage subsystem performance than something like hdparm which is very small sequential I/O.
>
> --- seeker_baryluk.c ---
>
> #define _LARGEFILE64_SOURCE
>
> #ifndef _REENTRANT
> #define _REENTRANT
> #endif
> #include <pthread.h>
>
> #include <stdio.h>
> #include <stdlib.h>
> #include <sys/types.h>
> #include <unistd.h>
> #include <errno.h>
> #include <time.h>
> #include <signal.h>
> #include <sys/fcntl.h>
> #include <sys/ioctl.h>
> #include <linux/fs.h>
>
> #define BLOCKSIZE 512
> #define TIMEOUT 30
>
> pthread_mutex_t muteks = PTHREAD_MUTEX_INITIALIZER;
>
> int count;
> time_t start;
> off64_t maxoffset = 0;
> off64_t minoffset = 249994674176000uLL;
>
>
> int threads;
>
> typedef struct {
> int id;
> int fd;
> int run;
> char* filename;
> unsigned int seed;
> unsigned long long numbytes;
> char* buffer;
> int count;
> off64_t maxoffset;
> off64_t minoffset;
> } parm;
>
> parm *p;
>
> void done() {
> int i;
> time_t end;
>
> time(&end);
>
> if (end < start + TIMEOUT) {
> printf(".");
> alarm(1);
> return;
> }
>
> for (i = 0; i < threads; i++) {
> p[i].run = 0;
> }
> }
>
> void report() {
> if (count) {
> printf(".\nResults: %d seeks/second, %.3f ms random access time (%llu < offsets < %llu)\n",
> count / TIMEOUT, 1000.0 * TIMEOUT / count, (unsigned long long)minoffset, (unsigned long long)maxoffset);
> }
> exit(EXIT_SUCCESS);
> }
>
> void handle(const char *string, int error) {
> if (error) {
> perror(string);
> exit(EXIT_FAILURE);
> }
> }
>
> void* f(void *arg) {
> int retval;
> off64_t offset;
>
> parm *p = (parm*)arg;
>
> srand(p->seed);
>
> /* wait for all processes */
> pthread_mutex_lock(&muteks);
> pthread_mutex_unlock(&muteks);
>
> while (p->run) {
> offset = (off64_t) ( (unsigned long long) (p->numbytes * (rand_r(&(p->seed)) / (RAND_MAX + 1.0) )));
> //printf("%d %llu\n", p->id, (unsigned long long )offset);
> retval = lseek64(p->fd, offset, SEEK_SET);
> handle("lseek64", retval == (off64_t) -1);
> retval = read(p->fd, p->buffer, BLOCKSIZE);
> handle("read", retval < 0);
>
> p->count++;
> if (offset > p->maxoffset) {
> p->maxoffset = offset;
> } else if (offset < p->minoffset) {
> p->minoffset = offset;
> }
> }
>
> //pthread_exit(NULL);
> return NULL;
> }
>
> int main(int argc, char **argv) {
> int fd, retval;
> int physical_sector_size = 0;
> size_t logical_sector_size = 0ULL;
> unsigned long long numblocks, numbytes;
> unsigned long long ull;
> unsigned long ul;
> pthread_t *t_id;
> pthread_attr_t pthread_custom_attr;
> int i;
>
> setvbuf(stdout, NULL, _IONBF, 0);
>
> printf("Seeker v3.0, 2009-06-17, "
> "http://www.linuxinsight.com/how_fast_is_your_disk.html\n");
>
> if (!(argc == 2 || argc == 3)) {
> printf("Usage: %s device [threads]\n", argv[0]);
> exit(1);
> }
>
> threads = 1;
> if (argc == 3) {
> threads = atoi(argv[2]);
> }
>
> //pthread_mutex_init(&muteks, NULL);
>
> fd = open(argv[1], O_RDONLY | O_LARGEFILE);
> handle("open", fd < 0);
>
> #ifdef BLKGETSIZE64
> retval = ioctl(fd, BLKGETSIZE64, &ull);
> numbytes = (unsigned long long)ull;
> #else
> retval = ioctl(fd, BLKGETSIZE, &ul);
> numbytes = (unsigned long long)ul;
> #endif
> handle("ioctl", retval == -1);
> retval = ioctl(fd, BLKBSZGET, &logical_sector_size);
> handle("ioctl", retval == -1 && logical_sector_size > 0);
> retval = ioctl(fd, BLKSSZGET, &physical_sector_size);
> handle("ioctl", retval == -1 && physical_sector_size > 0);
> numblocks = ((unsigned long long)numbytes)/(unsigned long long)BLOCKSIZE;
> printf("Benchmarking %s [%llu blocks, %llu bytes, %llu GB, %llu MB, %llu GiB, %llu MiB]\n",
> argv[1], numblocks, numbytes, numbytes/(1024uLL*1024uLL*1024uLL), numbytes / (1024uLL*1024uLL), numbytes/(1000uLL*1000uLL*1000uLL), numbytes / (1000uLL*1000uLL));
> printf("[%d logical sector size, %d physical sector size]\n", physical_sector_size, physical_sector_size);
> printf("[%d threads]\n", threads);
> printf("Wait %d seconds", TIMEOUT);
>
> t_id = (pthread_t *)malloc(threads*sizeof(pthread_t));
> handle("malloc", t_id == NULL);
> pthread_attr_init(&pthread_custom_attr);
> p = (parm *)malloc(sizeof(parm)*threads);
> handle("malloc", p == NULL);
>
> time(&start);
>
> pthread_mutex_lock(&muteks);
>
>
> srand((unsigned int)start*(unsigned int)getpid());
>
> for (i = 0; i < threads; i++) {
> p[i].id = i;
> p[i].filename = argv[1];
> p[i].seed = rand()+i;
> p[i].fd = dup(fd);
> handle("dup", p[i].fd < 0);
> p[i].buffer = malloc(sizeof(char)*BLOCKSIZE);
> p[i].numbytes = numbytes;
> handle("malloc", p[i].buffer == NULL);
> p[i].run = 1;
> p[i].count = 0;
> p[i].minoffset = minoffset;
> p[i].maxoffset = maxoffset;
>
> retval = pthread_create(&(t_id[i]), NULL, f, (void*)(p+i));
> handle("pthread_create", retval != 0);
> }
>
> sleep(1);
>
> time(&start);
> signal(SIGALRM, &done);
> alarm(1);
>
> pthread_mutex_unlock(&muteks);
>
> for (i = 0; i < threads; i++) {
> pthread_join(t_id[i], NULL);
> }
>
> for (i = 0; i < threads; i++) {
> count += p[i].count;
> if (p[i].maxoffset > maxoffset) {
> maxoffset = p[i].maxoffset;
> }
> if (p[i].minoffset < minoffset) {
> minoffset = p[i].minoffset;
> }
> }
>
> report();
>
> /* notreached */
> return 0;
> }
>
> _______________________________________________
> xfs mailing list
> xfs@oss.sgi.com
> http://oss.sgi.com/mailman/listinfo/xfs
>
Hi,
results are attached. There appears to be no difference between any of
the schedulers.
Regards,
Pedro
[-- Attachment #2: seeker.results --]
[-- Type: application/octet-stream, Size: 32927 bytes --]
/dev/sda:
ATA device, with non-removable media
Model Number: WDC WD3200BEVS-08VAT2
Serial Number: WD-WXK0E59AWY28
Firmware Revision: 14.01A14
Transport: Serial, SATA 1.0a, SATA II Extensions, SATA Rev 2.5
Standards:
Supported: 8 7 6 5
Likely used: 8
Configuration:
Logical max current
cylinders 16383 16383
heads 16 16
sectors/track 63 63
--
CHS current addressable sectors: 16514064
LBA user addressable sectors: 268435455
LBA48 user addressable sectors: 625142448
Logical/Physical Sector size: 512 bytes
device size with M = 1024*1024: 305245 MBytes
device size with M = 1000*1000: 320072 MBytes (320 GB)
cache/buffer size = 8192 KBytes
Nominal Media Rotation Rate: 5400
Capabilities:
LBA, IORDY(can be disabled)
Queue depth: 32
Standby timer values: spec'd by Standard, no device specific minimum
R/W multiple sector transfer: Max = 16 Current = 16
Advanced power management level: 192
Recommended acoustic management value: 128, current value: 254
DMA: mdma0 mdma1 mdma2 udma0 udma1 udma2 udma3 udma4 udma5 *udma6
Cycle time: min=120ns recommended=120ns
PIO: pio0 pio1 pio2 pio3 pio4
Cycle time: no flow control=120ns IORDY flow control=120ns
Commands/features:
Enabled Supported:
* SMART feature set
Security Mode feature set
* Power Management feature set
* Write cache
* Look-ahead
* Host Protected Area feature set
* WRITE_BUFFER command
* READ_BUFFER command
* DOWNLOAD_MICROCODE
* Advanced Power Management feature set
SET_MAX security extension
* Automatic Acoustic Management feature set
* 48-bit Address feature set
* Device Configuration Overlay feature set
* Mandatory FLUSH_CACHE
* FLUSH_CACHE_EXT
* SMART error logging
* SMART self-test
* General Purpose Logging feature set
* WRITE_{DMA|MULTIPLE}_FUA_EXT
* 64-bit World wide name
* IDLE_IMMEDIATE with UNLOAD
* Disable Data Transfer After Error Detection
* WRITE_UNCORRECTABLE_EXT command
* Segmented DOWNLOAD_MICROCODE
* Gen1 signaling speed (1.5Gb/s)
* Native Command Queueing (NCQ)
* Host-initiated interface power management
* Phy event counters
* DMA Setup Auto-Activate optimization
Device-initiated interface power management
* Software settings preservation
* SMART Command Transport (SCT) feature set
* SCT Long Sector Access (AC1)
* SCT LBA Segment Access (AC2)
* SCT Error Recovery Control (AC3)
* SCT Features Control (AC4)
* SCT Data Tables (AC5)
unknown 206[12] (vendor specific)
unknown 206[13] (vendor specific)
Security:
Master password revision code = 65534
supported
not enabled
not locked
frozen
not expired: security count
supported: enhanced erase
102min for SECURITY ERASE UNIT. 102min for ENHANCED SECURITY ERASE UNIT.
Logical Unit WWN Device Identifier: 50014ee203093006
NAA : 5
IEEE OUI : 0014ee
Unique ID : 203093006
Checksum: correct
Testing with noop
-----------------------------------------
1 threads noop
Seeker v3.0, 2009-06-17, http://www.linuxinsight.com/how_fast_is_your_disk.html
Benchmarking /dev/sda1 [690732 blocks, 353654784 bytes, 0 GB, 337 MB, 0 GiB, 353 MiB]
[512 logical sector size, 512 physical sector size]
[1 threads]
Wait 30 seconds..............................
Results: 127 seeks/second, 7.855 ms random access time (3517 < offsets < 353538659)
Seeker v3.0, 2009-06-17, http://www.linuxinsight.com/how_fast_is_your_disk.html
Benchmarking /dev/sda2 [624446550 blocks, 319716633600 bytes, 297 GB, 304905 MB, 319 GiB, 319716 MiB]
[512 logical sector size, 512 physical sector size]
[1 threads]
Wait 30 seconds..............................
Results: 57 seeks/second, 17.271 ms random access time (277887010 < offsets < 319671385051)
Seeker v3.0, 2009-06-17, http://www.linuxinsight.com/how_fast_is_your_disk.html
Benchmarking /dev/mapper/vgroup-ROOT [52428800 blocks, 26843545600 bytes, 25 GB, 25600 MB, 26 GiB, 26843 MiB]
[512 logical sector size, 512 physical sector size]
[1 threads]
Wait 30 seconds..............................
Results: 79 seeks/second, 12.584 ms random access time (4804250 < offsets < 26842257000)
Seeker v3.0, 2009-06-17, http://www.linuxinsight.com/how_fast_is_your_disk.html
Benchmarking /dev/mapper/vgroup-SWAP [20971520 blocks, 10737418240 bytes, 10 GB, 10240 MB, 10 GiB, 10737 MiB]
[512 logical sector size, 512 physical sector size]
[1 threads]
Wait 30 seconds..............................
Results: 78 seeks/second, 12.728 ms random access time (3436255 < offsets < 10737263755)
Seeker v3.0, 2009-06-17, http://www.linuxinsight.com/how_fast_is_your_disk.html
Benchmarking /dev/mapper/vgroup-HOME [551043072 blocks, 282134052864 bytes, 262 GB, 269064 MB, 282 GiB, 282134 MiB]
[512 logical sector size, 512 physical sector size]
[1 threads]
Wait 30 seconds..............................
Results: 53 seeks/second, 18.622 ms random access time (126911629 < offsets < 282060673146)
-----------------------------------------
8 threads noop
Seeker v3.0, 2009-06-17, http://www.linuxinsight.com/how_fast_is_your_disk.html
Benchmarking /dev/sda1 [690732 blocks, 353654784 bytes, 0 GB, 337 MB, 0 GiB, 353 MiB]
[512 logical sector size, 512 physical sector size]
[8 threads]
Wait 30 seconds..............................
Results: 316 seeks/second, 3.159 ms random access time (10600 < offsets < 353615977)
Seeker v3.0, 2009-06-17, http://www.linuxinsight.com/how_fast_is_your_disk.html
Benchmarking /dev/sda2 [624446550 blocks, 319716633600 bytes, 297 GB, 304905 MB, 319 GiB, 319716 MiB]
[512 logical sector size, 512 physical sector size]
[1 threads]
Wait 30 seconds..............................
Results: 58 seeks/second, 17.075 ms random access time (531143072 < offsets < 319611992787)
Seeker v3.0, 2009-06-17, http://www.linuxinsight.com/how_fast_is_your_disk.html
Benchmarking /dev/mapper/vgroup-ROOT [52428800 blocks, 26843545600 bytes, 25 GB, 25600 MB, 26 GiB, 26843 MiB]
[512 logical sector size, 512 physical sector size]
[8 threads]
Wait 30 seconds..............................
Results: 124 seeks/second, 8.013 ms random access time (10228387 < offsets < 26829552837)
Seeker v3.0, 2009-06-17, http://www.linuxinsight.com/how_fast_is_your_disk.html
Benchmarking /dev/mapper/vgroup-SWAP [20971520 blocks, 10737418240 bytes, 10 GB, 10240 MB, 10 GiB, 10737 MiB]
[512 logical sector size, 512 physical sector size]
[8 threads]
Wait 30 seconds..............................
Results: 159 seeks/second, 6.272 ms random access time (880360 < offsets < 10734628965)
Seeker v3.0, 2009-06-17, http://www.linuxinsight.com/how_fast_is_your_disk.html
Benchmarking /dev/mapper/vgroup-HOME [551043072 blocks, 282134052864 bytes, 262 GB, 269064 MB, 282 GiB, 282134 MiB]
[512 logical sector size, 512 physical sector size]
[8 threads]
Wait 30 seconds..............................
Results: 89 seeks/second, 11.215 ms random access time (56727966 < offsets < 282087146258)
-----------------------------------------
16 threads noop
Seeker v3.0, 2009-06-17, http://www.linuxinsight.com/how_fast_is_your_disk.html
Benchmarking /dev/sda1 [690732 blocks, 353654784 bytes, 0 GB, 337 MB, 0 GiB, 353 MiB]
[512 logical sector size, 512 physical sector size]
[16 threads]
Wait 30 seconds..............................
Results: 601 seeks/second, 1.662 ms random access time (24444 < offsets < 353644033)
Seeker v3.0, 2009-06-17, http://www.linuxinsight.com/how_fast_is_your_disk.html
Benchmarking /dev/sda2 [624446550 blocks, 319716633600 bytes, 297 GB, 304905 MB, 319 GiB, 319716 MiB]
[512 logical sector size, 512 physical sector size]
[16 threads]
Wait 30 seconds..............................
Results: 101 seeks/second, 9.859 ms random access time (198693453 < offsets < 319710370083)
Seeker v3.0, 2009-06-17, http://www.linuxinsight.com/how_fast_is_your_disk.html
Benchmarking /dev/mapper/vgroup-ROOT [52428800 blocks, 26843545600 bytes, 25 GB, 25600 MB, 26 GiB, 26843 MiB]
[512 logical sector size, 512 physical sector size]
[16 threads]
Wait 30 seconds..............................
Results: 150 seeks/second, 6.655 ms random access time (4958687 < offsets < 26841589012)
Seeker v3.0, 2009-06-17, http://www.linuxinsight.com/how_fast_is_your_disk.html
Benchmarking /dev/mapper/vgroup-SWAP [20971520 blocks, 10737418240 bytes, 10 GB, 10240 MB, 10 GiB, 10737 MiB]
[512 logical sector size, 512 physical sector size]
[16 threads]
Wait 30 seconds..............................
Results: 187 seeks/second, 5.347 ms random access time (830085 < offsets < 10737258260)
Seeker v3.0, 2009-06-17, http://www.linuxinsight.com/how_fast_is_your_disk.html
Benchmarking /dev/mapper/vgroup-HOME [551043072 blocks, 282134052864 bytes, 262 GB, 269064 MB, 282 GiB, 282134 MiB]
[512 logical sector size, 512 physical sector size]
[16 threads]
Wait 30 seconds..............................
Results: 99 seeks/second, 10.033 ms random access time (5762410 < offsets < 282062777311)
-----------------------------------------
32 threads noop
Seeker v3.0, 2009-06-17, http://www.linuxinsight.com/how_fast_is_your_disk.html
Benchmarking /dev/sda1 [690732 blocks, 353654784 bytes, 0 GB, 337 MB, 0 GiB, 353 MiB]
[512 logical sector size, 512 physical sector size]
[32 threads]
Wait 30 seconds..............................
Results: 493767 seeks/second, 0.002 ms random access time (64 < offsets < 353654779)
Seeker v3.0, 2009-06-17, http://www.linuxinsight.com/how_fast_is_your_disk.html
Benchmarking /dev/sda2 [624446550 blocks, 319716633600 bytes, 297 GB, 304905 MB, 319 GiB, 319716 MiB]
[512 logical sector size, 512 physical sector size]
[32 threads]
Wait 30 seconds..............................
Results: 112 seeks/second, 8.926 ms random access time (57579357 < offsets < 319452443816)
Seeker v3.0, 2009-06-17, http://www.linuxinsight.com/how_fast_is_your_disk.html
Benchmarking /dev/mapper/vgroup-ROOT [52428800 blocks, 26843545600 bytes, 25 GB, 25600 MB, 26 GiB, 26843 MiB]
[512 logical sector size, 512 physical sector size]
[32 threads]
Wait 30 seconds..............................
Results: 180 seeks/second, 5.541 ms random access time (7295087 < offsets < 26836715687)
Seeker v3.0, 2009-06-17, http://www.linuxinsight.com/how_fast_is_your_disk.html
Benchmarking /dev/mapper/vgroup-SWAP [20971520 blocks, 10737418240 bytes, 10 GB, 10240 MB, 10 GiB, 10737 MiB]
[512 logical sector size, 512 physical sector size]
[32 threads]
Wait 30 seconds..............................
Results: 212 seeks/second, 4.704 ms random access time (626875 < offsets < 10736009075)
Seeker v3.0, 2009-06-17, http://www.linuxinsight.com/how_fast_is_your_disk.html
Benchmarking /dev/mapper/vgroup-HOME [551043072 blocks, 282134052864 bytes, 262 GB, 269064 MB, 282 GiB, 282134 MiB]
[512 logical sector size, 512 physical sector size]
[32 threads]
Wait 30 seconds..............................
Results: 115 seeks/second, 8.633 ms random access time (84299537 < offsets < 282097554752)
-----------------------------------------
64 threads noop
Seeker v3.0, 2009-06-17, http://www.linuxinsight.com/how_fast_is_your_disk.html
Benchmarking /dev/sda1 [690732 blocks, 353654784 bytes, 0 GB, 337 MB, 0 GiB, 353 MiB]
[512 logical sector size, 512 physical sector size]
[64 threads]
Wait 30 seconds..............................
Results: 1136082 seeks/second, 0.001 ms random access time (0 < offsets < 353654783)
Seeker v3.0, 2009-06-17, http://www.linuxinsight.com/how_fast_is_your_disk.html
Benchmarking /dev/sda2 [624446550 blocks, 319716633600 bytes, 297 GB, 304905 MB, 319 GiB, 319716 MiB]
[512 logical sector size, 512 physical sector size]
[64 threads]
Wait 30 seconds..............................
Results: 113 seeks/second, 8.780 ms random access time (150422945 < offsets < 319508442517)
Seeker v3.0, 2009-06-17, http://www.linuxinsight.com/how_fast_is_your_disk.html
Benchmarking /dev/mapper/vgroup-ROOT [52428800 blocks, 26843545600 bytes, 25 GB, 25600 MB, 26 GiB, 26843 MiB]
[512 logical sector size, 512 physical sector size]
[64 threads]
Wait 30 seconds..............................
Results: 179 seeks/second, 5.571 ms random access time (2712462 < offsets < 26837002950)
Seeker v3.0, 2009-06-17, http://www.linuxinsight.com/how_fast_is_your_disk.html
Benchmarking /dev/mapper/vgroup-SWAP [20971520 blocks, 10737418240 bytes, 10 GB, 10240 MB, 10 GiB, 10737 MiB]
[512 logical sector size, 512 physical sector size]
[64 threads]
Wait 30 seconds..............................
Results: 211 seeks/second, 4.735 ms random access time (906575 < offsets < 10735000880)
Seeker v3.0, 2009-06-17, http://www.linuxinsight.com/how_fast_is_your_disk.html
Benchmarking /dev/mapper/vgroup-HOME [551043072 blocks, 282134052864 bytes, 262 GB, 269064 MB, 282 GiB, 282134 MiB]
[512 logical sector size, 512 physical sector size]
[64 threads]
Wait 30 seconds..............................
Results: 119 seeks/second, 8.403 ms random access time (41974115 < offsets < 282018133313)
-----------------------------------------
Testing with deadline
-----------------------------------------
1 threads deadline
Seeker v3.0, 2009-06-17, http://www.linuxinsight.com/how_fast_is_your_disk.html
Benchmarking /dev/sda1 [690732 blocks, 353654784 bytes, 0 GB, 337 MB, 0 GiB, 353 MiB]
[512 logical sector size, 512 physical sector size]
[1 threads]
Wait 30 seconds..............................
Results: 930603 seeks/second, 0.001 ms random access time (6 < offsets < 353654762)
Seeker v3.0, 2009-06-17, http://www.linuxinsight.com/how_fast_is_your_disk.html
Benchmarking /dev/sda2 [624446550 blocks, 319716633600 bytes, 297 GB, 304905 MB, 319 GiB, 319716 MiB]
[512 logical sector size, 512 physical sector size]
[1 threads]
Wait 30 seconds..............................
Results: 58 seeks/second, 17.065 ms random access time (380990045 < offsets < 319703224009)
Seeker v3.0, 2009-06-17, http://www.linuxinsight.com/how_fast_is_your_disk.html
Benchmarking /dev/mapper/vgroup-ROOT [52428800 blocks, 26843545600 bytes, 25 GB, 25600 MB, 26 GiB, 26843 MiB]
[512 logical sector size, 512 physical sector size]
[1 threads]
Wait 30 seconds..............................
Results: 73 seeks/second, 13.520 ms random access time (15440975 < offsets < 26799130725)
Seeker v3.0, 2009-06-17, http://www.linuxinsight.com/how_fast_is_your_disk.html
Benchmarking /dev/mapper/vgroup-SWAP [20971520 blocks, 10737418240 bytes, 10 GB, 10240 MB, 10 GiB, 10737 MiB]
[512 logical sector size, 512 physical sector size]
[1 threads]
Wait 30 seconds..............................
Results: 94 seeks/second, 10.631 ms random access time (2153720 < offsets < 10731855380)
Seeker v3.0, 2009-06-17, http://www.linuxinsight.com/how_fast_is_your_disk.html
Benchmarking /dev/mapper/vgroup-HOME [551043072 blocks, 282134052864 bytes, 262 GB, 269064 MB, 282 GiB, 282134 MiB]
[512 logical sector size, 512 physical sector size]
[1 threads]
Wait 30 seconds..............................
Results: 53 seeks/second, 18.773 ms random access time (371135819 < offsets < 282075543662)
-----------------------------------------
8 threads deadline
Seeker v3.0, 2009-06-17, http://www.linuxinsight.com/how_fast_is_your_disk.html
Benchmarking /dev/sda1 [690732 blocks, 353654784 bytes, 0 GB, 337 MB, 0 GiB, 353 MiB]
[512 logical sector size, 512 physical sector size]
[8 threads]
Wait 30 seconds..............................
Results: 1276976 seeks/second, 0.001 ms random access time (2 < offsets < 353654765)
Seeker v3.0, 2009-06-17, http://www.linuxinsight.com/how_fast_is_your_disk.html
Benchmarking /dev/sda2 [624446550 blocks, 319716633600 bytes, 297 GB, 304905 MB, 319 GiB, 319716 MiB]
[512 logical sector size, 512 physical sector size]
[1 threads]
Wait 30 seconds..............................
Results: 57 seeks/second, 17.361 ms random access time (300690163 < offsets < 319073861154)
Seeker v3.0, 2009-06-17, http://www.linuxinsight.com/how_fast_is_your_disk.html
Benchmarking /dev/mapper/vgroup-ROOT [52428800 blocks, 26843545600 bytes, 25 GB, 25600 MB, 26 GiB, 26843 MiB]
[512 logical sector size, 512 physical sector size]
[8 threads]
Wait 30 seconds..............................
Results: 126 seeks/second, 7.930 ms random access time (10326525 < offsets < 26839243512)
Seeker v3.0, 2009-06-17, http://www.linuxinsight.com/how_fast_is_your_disk.html
Benchmarking /dev/mapper/vgroup-SWAP [20971520 blocks, 10737418240 bytes, 10 GB, 10240 MB, 10 GiB, 10737 MiB]
[512 logical sector size, 512 physical sector size]
[8 threads]
Wait 30 seconds..............................
Results: 159 seeks/second, 6.284 ms random access time (544295 < offsets < 10737117575)
Seeker v3.0, 2009-06-17, http://www.linuxinsight.com/how_fast_is_your_disk.html
Benchmarking /dev/mapper/vgroup-HOME [551043072 blocks, 282134052864 bytes, 262 GB, 269064 MB, 282 GiB, 282134 MiB]
[512 logical sector size, 512 physical sector size]
[8 threads]
Wait 30 seconds..............................
Results: 88 seeks/second, 11.364 ms random access time (46681290 < offsets < 282069914470)
-----------------------------------------
16 threads deadline
Seeker v3.0, 2009-06-17, http://www.linuxinsight.com/how_fast_is_your_disk.html
Benchmarking /dev/sda1 [690732 blocks, 353654784 bytes, 0 GB, 337 MB, 0 GiB, 353 MiB]
[512 logical sector size, 512 physical sector size]
[16 threads]
Wait 30 seconds..............................
Results: 1199231 seeks/second, 0.001 ms random access time (6 < offsets < 353654783)
Seeker v3.0, 2009-06-17, http://www.linuxinsight.com/how_fast_is_your_disk.html
Benchmarking /dev/sda2 [624446550 blocks, 319716633600 bytes, 297 GB, 304905 MB, 319 GiB, 319716 MiB]
[512 logical sector size, 512 physical sector size]
[16 threads]
Wait 30 seconds..............................
Results: 101 seeks/second, 9.843 ms random access time (20694570 < offsets < 319463957722)
Seeker v3.0, 2009-06-17, http://www.linuxinsight.com/how_fast_is_your_disk.html
Benchmarking /dev/mapper/vgroup-ROOT [52428800 blocks, 26843545600 bytes, 25 GB, 25600 MB, 26 GiB, 26843 MiB]
[512 logical sector size, 512 physical sector size]
[16 threads]
Wait 30 seconds..............................
Results: 139 seeks/second, 7.160 ms random access time (7902462 < offsets < 26819434300)
Seeker v3.0, 2009-06-17, http://www.linuxinsight.com/how_fast_is_your_disk.html
Benchmarking /dev/mapper/vgroup-SWAP [20971520 blocks, 10737418240 bytes, 10 GB, 10240 MB, 10 GiB, 10737 MiB]
[512 logical sector size, 512 physical sector size]
[16 threads]
Wait 30 seconds..............................
Results: 184 seeks/second, 5.411 ms random access time (4445670 < offsets < 10734983830)
Seeker v3.0, 2009-06-17, http://www.linuxinsight.com/how_fast_is_your_disk.html
Benchmarking /dev/mapper/vgroup-HOME [551043072 blocks, 282134052864 bytes, 262 GB, 269064 MB, 282 GiB, 282134 MiB]
[512 logical sector size, 512 physical sector size]
[16 threads]
Wait 30 seconds..............................
Results: 99 seeks/second, 10.077 ms random access time (49159096 < offsets < 282048947579)
-----------------------------------------
32 threads deadline
Seeker v3.0, 2009-06-17, http://www.linuxinsight.com/how_fast_is_your_disk.html
Benchmarking /dev/sda1 [690732 blocks, 353654784 bytes, 0 GB, 337 MB, 0 GiB, 353 MiB]
[512 logical sector size, 512 physical sector size]
[32 threads]
Wait 30 seconds..............................
Results: 1162557 seeks/second, 0.001 ms random access time (0 < offsets < 353654763)
Seeker v3.0, 2009-06-17, http://www.linuxinsight.com/how_fast_is_your_disk.html
Benchmarking /dev/sda2 [624446550 blocks, 319716633600 bytes, 297 GB, 304905 MB, 319 GiB, 319716 MiB]
[512 logical sector size, 512 physical sector size]
[32 threads]
Wait 30 seconds..............................
Results: 112 seeks/second, 8.899 ms random access time (16924341 < offsets < 319632055363)
Seeker v3.0, 2009-06-17, http://www.linuxinsight.com/how_fast_is_your_disk.html
Benchmarking /dev/mapper/vgroup-ROOT [52428800 blocks, 26843545600 bytes, 25 GB, 25600 MB, 26 GiB, 26843 MiB]
[512 logical sector size, 512 physical sector size]
[32 threads]
Wait 30 seconds..............................
Results: 177 seeks/second, 5.642 ms random access time (4036050 < offsets < 26842655212)
Seeker v3.0, 2009-06-17, http://www.linuxinsight.com/how_fast_is_your_disk.html
Benchmarking /dev/mapper/vgroup-SWAP [20971520 blocks, 10737418240 bytes, 10 GB, 10240 MB, 10 GiB, 10737 MiB]
[512 logical sector size, 512 physical sector size]
[32 threads]
Wait 30 seconds..............................
Results: 210 seeks/second, 4.760 ms random access time (1410085 < offsets < 10735402820)
Seeker v3.0, 2009-06-17, http://www.linuxinsight.com/how_fast_is_your_disk.html
Benchmarking /dev/mapper/vgroup-HOME [551043072 blocks, 282134052864 bytes, 262 GB, 269064 MB, 282 GiB, 282134 MiB]
[512 logical sector size, 512 physical sector size]
[32 threads]
Wait 30 seconds..............................
Results: 115 seeks/second, 8.646 ms random access time (74318551 < offsets < 282066556688)
-----------------------------------------
64 threads deadline
Seeker v3.0, 2009-06-17, http://www.linuxinsight.com/how_fast_is_your_disk.html
Benchmarking /dev/sda1 [690732 blocks, 353654784 bytes, 0 GB, 337 MB, 0 GiB, 353 MiB]
[512 logical sector size, 512 physical sector size]
[64 threads]
Wait 30 seconds..............................
Results: 1121451 seeks/second, 0.001 ms random access time (8 < offsets < 353654775)
Seeker v3.0, 2009-06-17, http://www.linuxinsight.com/how_fast_is_your_disk.html
Benchmarking /dev/sda2 [624446550 blocks, 319716633600 bytes, 297 GB, 304905 MB, 319 GiB, 319716 MiB]
[512 logical sector size, 512 physical sector size]
[64 threads]
Wait 30 seconds..............................
Results: 116 seeks/second, 8.571 ms random access time (377091035 < offsets < 319547630026)
Seeker v3.0, 2009-06-17, http://www.linuxinsight.com/how_fast_is_your_disk.html
Benchmarking /dev/mapper/vgroup-ROOT [52428800 blocks, 26843545600 bytes, 25 GB, 25600 MB, 26 GiB, 26843 MiB]
[512 logical sector size, 512 physical sector size]
[64 threads]
Wait 30 seconds..............................
Results: 180 seeks/second, 5.539 ms random access time (3366562 < offsets < 26843413575)
Seeker v3.0, 2009-06-17, http://www.linuxinsight.com/how_fast_is_your_disk.html
Benchmarking /dev/mapper/vgroup-SWAP [20971520 blocks, 10737418240 bytes, 10 GB, 10240 MB, 10 GiB, 10737 MiB]
[512 logical sector size, 512 physical sector size]
[64 threads]
Wait 30 seconds..............................
Results: 212 seeks/second, 4.698 ms random access time (9077250 < offsets < 10736255180)
Seeker v3.0, 2009-06-17, http://www.linuxinsight.com/how_fast_is_your_disk.html
Benchmarking /dev/mapper/vgroup-HOME [551043072 blocks, 282134052864 bytes, 262 GB, 269064 MB, 282 GiB, 282134 MiB]
[512 logical sector size, 512 physical sector size]
[64 threads]
Wait 30 seconds..............................
Results: 117 seeks/second, 8.547 ms random access time (14177360 < offsets < 282035478745)
-----------------------------------------
Testing with cfq
-----------------------------------------
1 threads cfq
Seeker v3.0, 2009-06-17, http://www.linuxinsight.com/how_fast_is_your_disk.html
Benchmarking /dev/sda1 [690732 blocks, 353654784 bytes, 0 GB, 337 MB, 0 GiB, 353 MiB]
[512 logical sector size, 512 physical sector size]
[1 threads]
Wait 30 seconds..............................
Results: 921678 seeks/second, 0.001 ms random access time (8 < offsets < 353654778)
Seeker v3.0, 2009-06-17, http://www.linuxinsight.com/how_fast_is_your_disk.html
Benchmarking /dev/sda2 [624446550 blocks, 319716633600 bytes, 297 GB, 304905 MB, 319 GiB, 319716 MiB]
[512 logical sector size, 512 physical sector size]
[1 threads]
Wait 30 seconds..............................
Results: 58 seeks/second, 17.172 ms random access time (16239197 < offsets < 319490125406)
Seeker v3.0, 2009-06-17, http://www.linuxinsight.com/how_fast_is_your_disk.html
Benchmarking /dev/mapper/vgroup-ROOT [52428800 blocks, 26843545600 bytes, 25 GB, 25600 MB, 26 GiB, 26843 MiB]
[512 logical sector size, 512 physical sector size]
[1 threads]
Wait 30 seconds..............................
Results: 85 seeks/second, 11.710 ms random access time (693575 < offsets < 26802205325)
Seeker v3.0, 2009-06-17, http://www.linuxinsight.com/how_fast_is_your_disk.html
Benchmarking /dev/mapper/vgroup-SWAP [20971520 blocks, 10737418240 bytes, 10 GB, 10240 MB, 10 GiB, 10737 MiB]
[512 logical sector size, 512 physical sector size]
[1 threads]
Wait 30 seconds..............................
Results: 99 seeks/second, 10.098 ms random access time (7985740 < offsets < 10734206135)
Seeker v3.0, 2009-06-17, http://www.linuxinsight.com/how_fast_is_your_disk.html
Benchmarking /dev/mapper/vgroup-HOME [551043072 blocks, 282134052864 bytes, 262 GB, 269064 MB, 282 GiB, 282134 MiB]
[512 logical sector size, 512 physical sector size]
[1 threads]
Wait 30 seconds..............................
Results: 59 seeks/second, 16.685 ms random access time (11497099 < offsets < 281771279049)
-----------------------------------------
8 threads cfq
Seeker v3.0, 2009-06-17, http://www.linuxinsight.com/how_fast_is_your_disk.html
Benchmarking /dev/sda1 [690732 blocks, 353654784 bytes, 0 GB, 337 MB, 0 GiB, 353 MiB]
[512 logical sector size, 512 physical sector size]
[8 threads]
Wait 30 seconds..............................
Results: 1279125 seeks/second, 0.001 ms random access time (0 < offsets < 353654783)
Seeker v3.0, 2009-06-17, http://www.linuxinsight.com/how_fast_is_your_disk.html
Benchmarking /dev/sda2 [624446550 blocks, 319716633600 bytes, 297 GB, 304905 MB, 319 GiB, 319716 MiB]
[512 logical sector size, 512 physical sector size]
[1 threads]
Wait 30 seconds..............................
Results: 58 seeks/second, 17.202 ms random access time (69772601 < offsets < 319674536685)
Seeker v3.0, 2009-06-17, http://www.linuxinsight.com/how_fast_is_your_disk.html
Benchmarking /dev/mapper/vgroup-ROOT [52428800 blocks, 26843545600 bytes, 25 GB, 25600 MB, 26 GiB, 26843 MiB]
[512 logical sector size, 512 physical sector size]
[8 threads]
Wait 30 seconds..............................
Results: 128 seeks/second, 7.792 ms random access time (4080662 < offsets < 26842256512)
Seeker v3.0, 2009-06-17, http://www.linuxinsight.com/how_fast_is_your_disk.html
Benchmarking /dev/mapper/vgroup-SWAP [20971520 blocks, 10737418240 bytes, 10 GB, 10240 MB, 10 GiB, 10737 MiB]
[512 logical sector size, 512 physical sector size]
[8 threads]
Wait 30 seconds..............................
Results: 161 seeks/second, 6.186 ms random access time (930135 < offsets < 10734888740)
Seeker v3.0, 2009-06-17, http://www.linuxinsight.com/how_fast_is_your_disk.html
Benchmarking /dev/mapper/vgroup-HOME [551043072 blocks, 282134052864 bytes, 262 GB, 269064 MB, 282 GiB, 282134 MiB]
[512 logical sector size, 512 physical sector size]
[8 threads]
Wait 30 seconds..............................
Results: 87 seeks/second, 11.368 ms random access time (211150864 < offsets < 282023071978)
-----------------------------------------
16 threads cfq
Seeker v3.0, 2009-06-17, http://www.linuxinsight.com/how_fast_is_your_disk.html
Benchmarking /dev/sda1 [690732 blocks, 353654784 bytes, 0 GB, 337 MB, 0 GiB, 353 MiB]
[512 logical sector size, 512 physical sector size]
[16 threads]
Wait 30 seconds..............................
Results: 1231879 seeks/second, 0.001 ms random access time (6 < offsets < 353654775)
Seeker v3.0, 2009-06-17, http://www.linuxinsight.com/how_fast_is_your_disk.html
Benchmarking /dev/sda2 [624446550 blocks, 319716633600 bytes, 297 GB, 304905 MB, 319 GiB, 319716 MiB]
[512 logical sector size, 512 physical sector size]
[16 threads]
Wait 30 seconds..............................
Results: 101 seeks/second, 9.849 ms random access time (35304726 < offsets < 319472946331)
Seeker v3.0, 2009-06-17, http://www.linuxinsight.com/how_fast_is_your_disk.html
Benchmarking /dev/mapper/vgroup-ROOT [52428800 blocks, 26843545600 bytes, 25 GB, 25600 MB, 26 GiB, 26843 MiB]
[512 logical sector size, 512 physical sector size]
[16 threads]
Wait 30 seconds..............................
Results: 143 seeks/second, 6.993 ms random access time (14745912 < offsets < 26838972875)
Seeker v3.0, 2009-06-17, http://www.linuxinsight.com/how_fast_is_your_disk.html
Benchmarking /dev/mapper/vgroup-SWAP [20971520 blocks, 10737418240 bytes, 10 GB, 10240 MB, 10 GiB, 10737 MiB]
[512 logical sector size, 512 physical sector size]
[16 threads]
Wait 30 seconds..............................
Results: 188 seeks/second, 5.317 ms random access time (1529170 < offsets < 10737281760)
Seeker v3.0, 2009-06-17, http://www.linuxinsight.com/how_fast_is_your_disk.html
Benchmarking /dev/mapper/vgroup-HOME [551043072 blocks, 282134052864 bytes, 262 GB, 269064 MB, 282 GiB, 282134 MiB]
[512 logical sector size, 512 physical sector size]
[16 threads]
Wait 30 seconds..............................
Results: 99 seeks/second, 10.091 ms random access time (1060227 < offsets < 282086038472)
-----------------------------------------
32 threads cfq
Seeker v3.0, 2009-06-17, http://www.linuxinsight.com/how_fast_is_your_disk.html
Benchmarking /dev/sda1 [690732 blocks, 353654784 bytes, 0 GB, 337 MB, 0 GiB, 353 MiB]
[512 logical sector size, 512 physical sector size]
[32 threads]
Wait 30 seconds..............................
Results: 1140315 seeks/second, 0.001 ms random access time (6 < offsets < 353654765)
Seeker v3.0, 2009-06-17, http://www.linuxinsight.com/how_fast_is_your_disk.html
Benchmarking /dev/sda2 [624446550 blocks, 319716633600 bytes, 297 GB, 304905 MB, 319 GiB, 319716 MiB]
[512 logical sector size, 512 physical sector size]
[32 threads]
Wait 30 seconds..............................
Results: 114 seeks/second, 8.744 ms random access time (123137621 < offsets < 319708915380)
Seeker v3.0, 2009-06-17, http://www.linuxinsight.com/how_fast_is_your_disk.html
Benchmarking /dev/mapper/vgroup-ROOT [52428800 blocks, 26843545600 bytes, 25 GB, 25600 MB, 26 GiB, 26843 MiB]
[512 logical sector size, 512 physical sector size]
[32 threads]
Wait 30 seconds..............................
Results: 176 seeks/second, 5.658 ms random access time (5448162 < offsets < 26840018400)
Seeker v3.0, 2009-06-17, http://www.linuxinsight.com/how_fast_is_your_disk.html
Benchmarking /dev/mapper/vgroup-SWAP [20971520 blocks, 10737418240 bytes, 10 GB, 10240 MB, 10 GiB, 10737 MiB]
[512 logical sector size, 512 physical sector size]
[32 threads]
Wait 30 seconds..............................
Results: 212 seeks/second, 4.701 ms random access time (2520880 < offsets < 10737041030)
Seeker v3.0, 2009-06-17, http://www.linuxinsight.com/how_fast_is_your_disk.html
Benchmarking /dev/mapper/vgroup-HOME [551043072 blocks, 282134052864 bytes, 262 GB, 269064 MB, 282 GiB, 282134 MiB]
[512 logical sector size, 512 physical sector size]
[32 threads]
Wait 30 seconds..............................
Results: 115 seeks/second, 8.661 ms random access time (20597584 < offsets < 282024661662)
-----------------------------------------
64 threads cfq
Seeker v3.0, 2009-06-17, http://www.linuxinsight.com/how_fast_is_your_disk.html
Benchmarking /dev/sda1 [690732 blocks, 353654784 bytes, 0 GB, 337 MB, 0 GiB, 353 MiB]
[512 logical sector size, 512 physical sector size]
[64 threads]
Wait 30 seconds..............................
Results: 1139340 seeks/second, 0.001 ms random access time (0 < offsets < 353654781)
Seeker v3.0, 2009-06-17, http://www.linuxinsight.com/how_fast_is_your_disk.html
Benchmarking /dev/sda2 [624446550 blocks, 319716633600 bytes, 297 GB, 304905 MB, 319 GiB, 319716 MiB]
[512 logical sector size, 512 physical sector size]
[64 threads]
Wait 30 seconds..............................
Results: 115 seeks/second, 8.651 ms random access time (3035060 < offsets < 319449639221)
Seeker v3.0, 2009-06-17, http://www.linuxinsight.com/how_fast_is_your_disk.html
Benchmarking /dev/mapper/vgroup-ROOT [52428800 blocks, 26843545600 bytes, 25 GB, 25600 MB, 26 GiB, 26843 MiB]
[512 logical sector size, 512 physical sector size]
[64 threads]
Wait 30 seconds..............................
Results: 178 seeks/second, 5.589 ms random access time (18073825 < offsets < 26839189662)
Seeker v3.0, 2009-06-17, http://www.linuxinsight.com/how_fast_is_your_disk.html
Benchmarking /dev/mapper/vgroup-SWAP [20971520 blocks, 10737418240 bytes, 10 GB, 10240 MB, 10 GiB, 10737 MiB]
[512 logical sector size, 512 physical sector size]
[64 threads]
Wait 30 seconds..............................
Results: 217 seeks/second, 4.607 ms random access time (260265 < offsets < 10736663900)
Seeker v3.0, 2009-06-17, http://www.linuxinsight.com/how_fast_is_your_disk.html
Benchmarking /dev/mapper/vgroup-HOME [551043072 blocks, 282134052864 bytes, 262 GB, 269064 MB, 282 GiB, 282134 MiB]
[512 logical sector size, 512 physical sector size]
[64 threads]
Wait 30 seconds..............................
Results: 118 seeks/second, 8.470 ms random access time (23813215 < offsets < 282129908516)
-----------------------------------------
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