Fio clat axboe You signed in with another tab or window. 0 on Ubuntu 16. If set to true, fio generates bw/clat/iops logs with per job unique filenames. io volume fits the job file, bandwidth seems appropriate) [global] size=1g loops=3 unlink_each_loop=1 [worker0_1m_readwrite] rw=readwrite blocksize=1m However fio d Saved searches Use saved searches to filter your results more quickly Doing a sequential write of a single file with fsync_on_close, the bandwidth number reported at the bottom is way too high. Description of the bug: I'm looking into some issues when running fio and ha Please acknowledge the following before creating a ticket [√ ] I have read the GitHub issues section of REPORTING-BUGS. 15 max completion latency Saved searches Use saved searches to filter your results more quickly Contribute to axboe/fio development by creating an account on GitHub. fio version: $ fio --version fio-3. If set to false, jobs with identical names will share a log filename. Below fio2gnuplot is run on a small set of logfiles from fio. can we chat on on private channel like slack for more Hello I am new to fio, and I am trying to learn how to use the fio2gnuplot tool. But when we use blocksize_range=4K-1024K, rw=randread and blocksize_unaligned=1, we get CRC errors fo Signed-off-by: Karolina Rogowska <karolina. When bs is given by the user without other options, this works fine. Notifications Fork 1. Installation. Using fio_plot. And It can b In trying to work around issue #631 I discovered what seems like a ~4k character limit on the filename argument. To install fio-plot system-wide, run: pip3 install fio-plot. fio and fio raid. Followed by a Saved searches Use saved searches to filter your results more quickly Flexible I/O Tester. Now that it's up and running, I've started exploring the fio benchmarking tool. Because this is doing mixed reads and writes with verify on it will potentially try and verify data which hasn't been written by this fio run in a similar way to --rw=randread [] --verify=md5. Two instances of my recent test runs below. He got tired of writing specific test applications to simulate a given fio is a tool that will spawn a number of threads or processes doing a particular type of I/O action as specified by the user. Description of the bug: I encountered out of memory while running the fio command on 3. Guess where the fio verify run fails? fio: got pattern '61', wanted '65'. FIO man page used wrong acronyms for Units. At some point I need to verify that it's all good and dump the existing store-then-verify code, since the experimental verify doesn't rely on having to store meta data to verify what we wrote. 12. I am using a low runtime, this is just to test my parameters are correctly set. Tested with both async I/O engine and sync I/O engine, and it's only reproduced with sync I/O engine. unless just get null data. But when nrfiles=10, the read job unlinks one file. # ~/ Please acknowledge the following before creating a ticket [ X ] I have read the GitHub issues section of REPORTING-BUGS. 7 kernel. csv You will end up with the following 3 files: -rw-r--r-- 1 root root 77547 Mar 24 15:17 fio-jsonplus_job0. But there is one thing to note in the parameters --rw=randrw [] --verify=md5. To see this more clear About 6 months ago, fio added a feature known as histogram logging, and support was added in fio --client to retrieve histogram logs from the remote workload generators. because it chose a Description of the bug: Fio reports higher runtime than the configured one Environment: Ubuntu 20 fio version: fio-3. 129. Use the 'thread' option to get rid of this warning. If I want to do test (when fio is writing, do asyn power, then power on, read back written data before power cycle, expect can verify written data integrity), can fio do this kind of test? Looking forward for your reply. Here is an example o Please acknowledge the following before creating a ticket [YES ] I have read the GitHub issues section of REPORTING-BUGS. 1. Notifications You must be signed in to change notification settings; Fork 1. verify_only Do not perform My bad! while moving parameters from job file to command line in shell script, I didn't escape the substring in pattern. You switched accounts on another tab or window. Should FIO only print this "array format" when --status-interval is used? Or should it always use the array format so that a single json output becomes an array of one status? In option 1 above the json output is consistent, it's always an array at the top-level this is a positive because an application can use the same parsing logic whether it Hi, I am running fio with 4 jobs per job section with write_lat_log, write_iops_log, write_bw_log. 5Gbps by FIO @axboe Is it possible to keep the fix for io_bytes?I think the logic was sound for that change and that bw is a different beast. log fio version = 3 bucket groups = 29 bucket bits = 6 time quantum = 1 sec percentiles = 0. Fio was written by Jens Axboe <axboe@kernel. The first row is I am intentionally executing 8 separate fio processes with verify_backlog enabled with the expectation of hitting a data verification failure in fio. fio was written by Jens Axboe <jens. Not terribly out of date, but not up to date. 22, stdev=73773012. axboe#39 an axboe#40, try to read the first zone of the drive. 2k. tobbe@desk This is the time it took to submit the I/O. 0 Overview and history-----fio was originally written to save me the hassle of writing special test case programs when I wanted to test a specific workload, either for performance reasons or to find/reproduce a bug. Please acknowledge the following before creating a ticket I have read the GitHub issues section of REPORTING-BUGS. 36 Using the latest FIO (fio-3. is a utility for converting *_clat_hist* files. That is, when I blktrace fio writes with an op rate of 250 IOps for 1 minute, the replay only produces ab As you can see, we have 3 identical offsets logged, one for each file. group_reporting The values for these two options don't quite work together although fio tries to carry on. I have read the GitHub issues section of REPORTING-BUGS. clat Completion latency minimum, maximum, average and standard deviation. 5 and 3. log, log_clat. plot "I/O Bandwidth" bw "Throughput (KB/s)" 1. run fio with the below input parameters. fio [read-test] filename=/dev Fio version is 3. 8 Starting 1 process (groupid=0, jobs=1): err= 0: pid=7098: Fri Jul 17 13:19:56 2015 write: io=6706. 2k; Star 5. Code; clat (nsec): min=12033P, max=12033P, avg Running fio with histogram output # numpy and pandas required for fiologparser_hist. However, I do see that it is actually writing the data (as shown below). node=1 will be acting as a server & node=1,2,3,4 will be acting as a client. 13 OS: Cent OS Linux 7. fio_plot is a python based tool to help run various fio benchmarks and then visualizing the results in various graphs. g. ; If 1. 1. The problem is that when it's not specified (like when using bssplit on its own), it defaults to 4096, which causes all the IOPS targets to be calculated assuming it's doing 4K blocks. 08, stdev=127816. The code points at o. Footer Fio version: fio-2. Saved searches Use saved searches to filter your results more quickly Flexible I/O Tester. nrfiles=200. iodepth=8 tells fio to put 8 IOs in flight before reaping completions, but verify_backlog=2 instructs fio to issue reads after two write operations have completed. 04. unsw. 0. I am having this issue with FIO compiled from the latest branch because we need the fix for first allocations. bs. cpus_allowed_policy=split # For the dev-dax engine: # # IOs always complete immediately # IOs are always direct # iodepth=1 Turns out that “rate_process=poisson” is the culprit in the following example that when read:write mix is not 50:50, the each I/O direction do not look like poisson applied independently causing read:write ratio and #IOPS are not taken i Flexible I/O Tester. My job file is from doc： # The most basic form of data verification. /fio-histo-log-pctiles. As I know, my hard drive has 7200rpm, it should have the maximum IOPS around 190 but Fio reported 20k. For latency percentiles While running a given workload, this is just an e. This command used to work used fine and FIO is being run as Admin and permissions are everyone full --directory=d\:\ PS D:> FI You signed in with another tab or window. 3 With regard to structuring the verification part: If you're happy verifying everything and time is not a problem use the "verify phase" that you get with do_verify=1 on write jobs that have verify set. In sync I/O case, latency data from fio statistics and blktrace is: It seems i have issues running fio on our shiny new aarch64 with 32 cores. Code; Issues 194; Pull requests 19; Discussions; Actions; Projects 0; Security; Insights New issue Have a question about this project? clat (usec): min=17, max=18276, avg=993. dk> to enable flexible testing of the Linux I/O subsystem and schedulers. Flexible I/O Tester. Observation: By looking at both Info 1 and Info 2, I think FIO man page got it wrong. 0,100. FIO stalls with out doing any IO operations if we set the io_submit_mode to offload. Apology for the false alarm. I have built fio from master and ran for 4k sequential write and its aggrb output is not the sum of all threads bw. unlink=0 [t0] [t1] [t2 Hi all, I have a question regarding to the meaning of the IOdepth, I am trying to understanding the output the FIO with the help of the link . 97, stdev=896. 3k; Star 5. fio jobby. 6k. 2 and on fio 3. He got tired of writing specific test applications to Fio spawns a number of threads or processes doing a particular type of I/O action as specified by the user. However, fio doesn't seem to keep up with the timestamps and runs very slowly. 12-24-ga031 The FIO job is shown below, it does a random read/write, with a fixed block size, it verifies as it writes, but the verification was successful. ; Description of the bug: The loops parameter may do not take effect in fio 3. ; Description of the bug: When running fio on an NVMe using jobs broken into random read and random write, specifying the --rwmixwrite and --rwmixread doesn't appear to actually change the read/write IOPS or bandwidth. 7 Starting 1 process fio: got pattern 'e0', wanted '20'. The fio load on that is a tim I use io_uring engine to test a sata ssd, and I find the clot latency is weird when I set sqthread_poll. 3. Notice there are multiple waits in the trace file, but fio waits for only the first wait entry $ cat test_v2. Perhaps there's a fio file lookup function which does use the --directory prefix, to perhaps check existence, permissions etc, but then the open part of the iolog replay doesn't? Attempting to run this simple test w/ --client sh-4. 47 --rw=write --ioengine=sync --fdatasync=1 --directory=test-data --size=22m --bs=2300 My fio jobs as following: [global] ioengine=libaio invalidate=1 ramp_time=5 size=128G iodepth=32 runtime=30 time_based [write-fio-4k-para] bs=4k stonewall Some tests, e. log Same workload with fio 3. Normal output 7. iolog fio version 2 iolog /dev/nvme0n1 add /dev/nvme0n1 open /dev/nvme0n1 write 75689525248 16384 /dev/nvme0n1 sync 0 0 /dev/nvme0n1 trim 75689525248 16384 /dev/nvme0n1 close Contribute to axboe/fio development by creating an account on GitHub. The system , drive, OS all remains same there is no change, the only delta is the fio When i run Fio while having disabled clat, slat and bandwidth tracking it "corrupts" the latency mentioned in standard Fio output and the corresponding . Using the write_hist_log parameter on fio versions 3. CentOS 7 18. @dustinblack thanks for looking into this, it's very strange that if you don't set the parameter, you get a problem but if you set it to any of the 3 possible parameter values, you don't get the problem. So with the example above, fio --invalidate=1 raid. 24, stdev= 2. 9GB, bw=1909. axboe / fio Public. Default: true. Sign in Product axboe / fio Public. The commit enabled clear_io_state() call in the loop of thread_main() after completion of IOs, regardless of verify option. fio version: 3. 04 Saved searches Use saved searches to filter your results more quickly You signed in with another tab or window. Write the device randomly # in 4K @sitsofe, I believe I have done enough research into the subject and believe that permanently changing the multipath. generated by fio into a CSV of latency statistics including minimum, average, maximum latency, and selectable While older fio versions started the fio parent PID and one fio child PID per each directory to run fio on several mountpoints in parallel, this is now broken. 8 and running the next command: fio --ioengine=libaio --ramp_time=5 --iodepth=2 --runtime=200 --time_based --direct=1 --name=randfile --bssplit=4k,128k --rw=randrw --filenam When I use fio to do the random write verify case, sometimes,there was a strange result,it makes me confused. 14 on FreeBSD 11. # of the original fio_generate_plots script provided as part of the FIO storage plot "I/O Completion Latency" clat "Time (msec)" 1000000. 16 Re Please acknowledge the following before creating a ticket I have read the GitHub issues section of REPORTING-BUGS. I found that fio memory consumption increased from ~425M to ~1. Try running with --debug=parse,file to see some more details about what's going on behind the scenes. I am trying to run the simple commands of: write_bw_log=first-fio write_iops_log=first-fio But I cannot seem to get any file to appear. Recommendation: Setting write_hist_log=foo without log_hist_msec=x (and/or with log_hist_msec=0) should result in a single histogram line entry Why didn't fio record 0 IOPS log entries, so we could find the IO outage only by finding gaps between consequent log entries in the log? How can we configure fio to avoid sending out "delayed" IO operations and make it always keep the IOPS level according to the configuration? fo configuration file: [global] iodepth=128 direct=1 ioengine=windowsaio Please acknowledge the following before creating a ticket I have read the GitHub issues section of REPORTING-BUGS. fio - the Flexible IO Tester is an application written by Jens Axboe, who may be better known as the maintainer of the Linux kernel's block IO subsystem. The reason is my jobs'are very heavy with high num_jobs from multi remote hosts, high runtime, high iodepth we must increase the interval time sothe the fio processes have enough time to collect data from all jobs. fio; sequence read of 4gb of data Please acknowledge the following before creating a ticket. x. io_bytes claimed to report a number of bytes, which was clearly not the case. This is the time between submission and completion. py x_clat_hist. This used to work in the past. Hi, Failed to create a directory when using fio-3. Like I said, opendir works in my simple tests. the minimal trace file: test. 4 LTS. 29. 12 on Ubuntu 19. 34. 23 built from source on Ubuntu 18. Code; create_only=0 disable_lat=1 disable_clat=1 disable_slat=1 startdelay=5 time_based=0 group_reporting=1 [write] new_group stonewall So, fio queries/stats the correct file, but doesn't actually open it. 0-53-g956e), combining --ramp_time and --io_submit_mode=offload will result in all completion latency stats to be set to 0 Example job file: sudo fio --name=test --filename=/dev/sdb --rw=randread --runtime=5s Description of the bug: I am trying to replay a trace file with fio. Hardware: CPU: Intel(R) Xeon(R) CPU E5-2620 v3 @ 2. 81 @axboe I updated the bug detail. com>. Description of the bug: Fio iolog replay does not report disk stats corrrectly, and the utils always be zero. Reproduction steps FIO does not honor the wait when trying to read_iolog on version 2 Steps: compile the latest FIO v3. However, if I use a blocksize of 4kb then all data verify checks pass. output fio-jsonplus. 21 clat (usec): min=6, max=42097k, avg=787. But for the last entry, there's just one, since only one file got written at that offset before fio was told to quit. 0GiB Also interesting to note that the experimental verification (experimental_verify=1) actually worked fine with this case. 1 + 13961 + 13953 + 13548 = 50366. so I reference fio doc for help but meet a problem. Please include a full list of the parameters passed to fio and the job file used (if any). fio takes a number of global parameters, each inherited by the thread unless otherwise parameters given to them fio - the Flexible IO Tester is an application written by Jens Axboe, who may be better known as the maintainer of the Linux kernel's block IO subsystem. log file when having Fio was written by Jens Axboe <axboe @ kernel. So I have set filename_format to match and this works with fewer than 10 files per job. 0-6. Here we discuss the latency problem from a user perspective. I'm running a 4KB random IO pattern against an Intel P3700 400GB NVMe SSD. filesize=4k. 5MB/s, iops=15275, runt=3596754msec Yes I know it's the default, I explicitly set --invalidate=1 in the example above to show that it's the problem and in case fio changes/changed the default behavior across releases. If the data from the previous run doesn't match up (e. They produced files as log_bw. SPDK) restart. Actual Behavior: Observed range o [root@jz-cae6d9ea42ed8df0fa7f10be3fbb-server-0-dzevespbolun ~]# fio --name=test --rw=randwrite --bs=4k --runtime=60 --ioengine=libaio --iodepth=1 --numjobs=1 fio-3. 0,95. Note that when this option is set to false log files will be opened in append mode and if log files already exist the previous contents will not be overwritten. 1511 Processor: x86_64 No of CPU cores: 8 Off late i have been noticing a lot of errors during fio cleanup. 5 does Contribute to axboe/fio development by creating an account on GitHub. 32. Toggle navigation. py: dnf update && dnf install -y git python numpy python2-pandas gcc librbd1-devel Flexible I/O Tester. 2. Is this a bug from Fio? Here is the config file: ubuntu@vm1:~$ cat sequential-read. I am running a FIO client server model on 4 nodes. . 2k; Star 4. Being a human, the auto scaling of values into the easiest to read unit is nice; however, trying to script and parse the results is a nightmare. ; Please acknowledge the following before creating a ticket. Description of the bug: fio hangs for long time, I'm not sure if it has anything to do with OOM. Hi, Description: Set the option bssplit=4k/10:64k/50:32k/40 and size=10M in a job file. 1G. Description of the bug: Section and write there that with nr_files=1 this issue doesnt occur Environment: Red Hat Enterpri I was trying to run fio on a nvme device. f Saved searches Use saved searches to filter your results more quickly I know the FIO summary tells you the QoS percen Skip to content. 04 (updated), enabled EPEL repo, installed FIO 3. You signed out in another tab or window. --nrfiles is actually associated with a different job from the one using --opendir. command : fio filecreate-ioengine. The bw property does not claim a unit, either in its name nor in the documentation. I believe the problem is that your workload produces latencies exceeding the upper bound of values that fio records accurately for the latency percentiles. Terse output. If I do the same test with end_fsync instead, the number is accurate 731MiB/s. ; Description of the bug: When verify_backlog is used on a write-only workload with a runtime= value and the runtime expires before the workload has written its full dataset, the read stats for the backlog verifies are not reported, resulting in a stat result Please acknowledge the following before creating a ticket I have read the GitHub issues section of REPORTING-BUGS. 0 buckets per group = 64 buckets per interval = 1856 output unit = usec ERROR: 116 buckets per interval but 1856 expected in in histogram record 2 file x Flexible I/O Tester. 0,99. e. IOPS and bandwidth are (total number of bytes or operataions) / (total time for the job). I am seeing way higher clat_ns values. When I do a replay of operations produced from constant rate load, the replay rate of operations is slower than the original (~2%). Reload to refresh your session. 1 - details of setup and FIO output given below in details. Read the rules Description of the bug: We have a write job that gets IO errors (as a part of our test). Hi, I got the same issue with latest fio version Environment : Centos 7, FIO version 3. Description of the bug: <Log shows "Operation not supported" when issuing fio trim test, we confirmed trim is supported on Flexible I/O Tester. 000 IOPS (incorrect). However, if the first zone is offline, the read fails along with the entire test. Expect to see only reads when this option is used. If o. ; Description of the bug: if we use iops_rate, test fio on OptaneSSD P5800 that is latency very stable SSD, avg latency report data not correctly. received This reverts commit 499cded. It resembles the older ffsb tool in a Flexible I/O Tester. Issue: iostat reports ~ 38MB/s (say 9200 x 4K IOps), while FIO reports 82. Detailed list of parameters 6. 13 on windows. 22. Without enough details to reproduce your issue it will I have used fio for benchmarking my SSD. As a result of that conversation, I redid the run with a different fio: norandommap given for variable block sizes, verify limited This is the error: Assertion failed: fio_file_open(f), file filesetup. 0,50. Would it be possible to add a switch to define which unit or force to the minimal unit? This Most of those options came before the first --name so the second job contains 95% of the same options as the first (only do_verify=1 would have been missing (which defaults to 1 anyway) and --verify_only=1 was added). bs differs from the minimum block size given in the bssplit parameter, the divisor is I am trying to write 10 files in a job, and then read them in another job. g: fio-2. This man page was written by Aaron Carroll <aaronc@cse. Every time I run a sequential write test on a ZFS pool, the final bandwidth result is always significantly higher than the bandwidth displayed during the test. It is assumed that the first zone is readable. How to reproduce. 36, but it was normal in versi Flexible I/O Tester. log where is x is jobs index 1,2,3,4. fio runs only on the first directory specified: slat (nsec): min=0, max=42050M, avg=257430. 10 with 4. (this is random read You signed in with another tab or window. 32 Not set sqthr Recently, I am experimenting on fio with all of its parameters and am trying to figure out what it means by specifying those options. Because of this, we see incorrect Units in FIO results. Here it shows 2576MiB/s. 2. 6. axboe@oracle. Also which generates the QoS @sitsofe After preconditioning the read iops and write performance of FIO dropped a bit, but both non-preconditioned and preconditioned tests are still no where near diskspd's result. I have some other aarch64 Cortex-A53 based boxes at home, on which fio runs just fine. However, I'm confused about the reported latency when fsync=1 (sync the dirty buffer to disk after every write()) parameter is specified. even TLC NVMe has this issue too. According to the documentation, "no_path_retry_count" implies "queue_if_no_path" but sets a limit on how many times to retry IO's in the queue before failing Flexible I/O Tester. svg Hi, I'm using FIO 3. Size of generated svg file is zero. I realize this may not be trivial to fix, but creating an issue as I look into it more. So there must be something special about your setup. Bad bits 1/0KB /s] [41. clat_percentiles=0. I see this on fio 3. from the description, the IOdepth means:. 04 kernel: 6. edu. Any ideas on how to achieve this? I am attaching job file and trace file below Environmen Hi, I was tracking an OOM issue in Ubuntu autopkgtest testing. 3k. dk> to enable flexible testing of the Linux I/O subsystem and schedulers. log_clat_hist. 4. disable_clat=1. Below is the FIO command & configuration file that i used, #fio --cli Please acknowledge the following before creating a ticket [X ] I have read the GitHub issues section of REPORTING-BUGS. As per documentation, verify_only option is supposed to read back and verify the data. This job file produces the expected output. 92896370688. fio io_uring single CPU core performance is only half of SPDK with the same core with intel P5800 Optane drive #1206. 40GHz RAM: 128G Dell 730xd Here, I made up a ram loo Flexible I/O Tester. Saved searches Use saved searches to filter your results more quickly I'm fairly new to fio so I don't know enough to call this a bug, maybe it's a lack of understanding on my part. I want to know is fio supposed to work with "-bsrange=512-2M -rw=randwrite -verify_backlog=1" very well? The fio version used w [bengland@bene-laptop repro]$ python . REPORTING Saved searches Use saved searches to filter your results more quickly @axboe @sitsofe While running some quick workloads its been seen that the "max " value for the cLAT in the Json output is not getting updated for per second data. When Description: clat plots are not rendered when running fio2gnuplot with latest version of fio. [root@bd-hdd03-node02 ~]# You signed in with another tab or window. c, line 1887. akoundal changed the title FIO max completion latency (cLat) value per second in json output not getting updated and reporting wrong data FIO 2. Job file format 5. Used comman In general latency is the difference between the start time for an io_u and its completion time. [global] ioengine=dirdelete. Expected Behavior: The range of bs should be between 4k and 32k and block size should split based on the weightage. com> fix test_data_integrity_5d_dss - changing duration to 2 days for both test cases - workaround for issue 'size not honored if filesize and nrfiles is set' - axboe/fio#1218 - open problem with 'fio reports verify: bad header rand_seed when using zoned random distribution' - axboe/fio Contribute to axboe/fio development by creating an account on GitHub. One other clue - the fio histogram results displayed in the main fio output do not show corruption, so it appears to be a problem with extracting the histogram Please acknowledge the following before creating a ticket I have read the GitHub issues section of REPORTING-BUGS. Notifications You must be signed in to change BW=2980KiB/s (3051kB/s)(20. $ fio --name=test_seq_write --filename=test_seq --size=2G --readwrite=write --fsync=1 test_seq_write: (g=0): rw=write, bs=4K-4K/4K-4K/4K-4K, ioengine=sync, iodepth=1 fio-2. Otherwise it does 2x. fio behave the same when the fio files are resident in the page cache. Reproduction steps The bandwidth is normal, because max bandwidth of my hard drive is around 115MB/s (from some benchmark website). Subsequently, when running large tests with 512 VMs generating work Saved searches Use saved searches to filter your results more quickly The interleaving blocks issue appears again on a newer version of FIO: fio-3. Environment: Ubuntu 20. If you only want to install it By commenting out the "rate_process=poisson" option in the following example, rate_iops are inline with the specified. I have disabled all the latency mesurements. fio: axboe / fio Public. Running fio 4. rd_qd_256_128k_1w_clat_hist. 2$ fio --client=10. Skip to content. When tried with blocksize=4K, rw=randread and blocksize_unaligned=1, we don't see any errors. In the interest of not breaking current users and enabling fio use in a Hello, I have discovered that --bandwidth-log command line option produces incomplete logs on longer test run times. Fio has an iodepth setting that controls how many IOs it The output from fio --version. If you are the user boiling mad from waiting 20 seconds for your directory to browse, you do not care what the average latency is - you only care what YOUR latency is RIGHT This is pretty showstopper for using consecutive jobs in a fio script with the default logging, because the active vs idle time varies based on how the device performs in each job. Contribute to axboe/fio development by creating an account on GitHub. The example is given below: Somehow I found Q2D(should be the stat from when IO submitted to block layer and completed) from blktrace is kindly different from clat from fio. 8K/0/0 iops] [eta 01m:28s] fio: bad pattern block offset 9 How to write a single shared file with multiple nodes and multiple jobs per node with FIO ? axboe / fio Public. Previously, I blogged about setting up my benchmarking machine. I'm trying to view the IOPS/BW over time using the write_bw_log and This is similar to issue #739 which was closed because of lack of response, so I started there, but it is different enough for @sitsofe to suggest that I open a new one. 1-liquorix-amd64 fio version: 3. It resembles the older ffsb tool in a few ways, but doesn't seem to have any relation I misread your fio invocation. basically with some reason io_uring cannot scale well on P5800 optane SSD drive. The typical use of fio is to write a job file matching the I/O load one FIO是Jens开发的一个开源测试工具，功能非常强大，本文就只介绍其中一些基本功能。 使用FIO之前，首先要有一些SSD性能测试的基础知识。 线程指的是同时有多少个读 fio was originally written to save me the hassle of writing special test case programs when I wanted to test a specific workload, either for performance reasons or to find/reproduce a bug. 1k. How fio works 3. Bad bits 2 fio: bad pattern block offset 417793 pattern: verify failed at file /dev/sdc offset 92896370688, length 21 received data dumped as sdc. enviroment os: ubuntu 22. aggrb should be => 8904. Hi, Is it possible to have results by second i am using FIO 2. ls -l *. The process Hi all, I fixed workaround this problem by increase log_avg_msec from 1000 to10000. That is what I just tried. 9 OS: Cent 7 Setup tgtd by iscsi target service in Linux through 100Gbps break out 4* 25Gbps with 100Gbps Switch, client storage performance will be limited almost 1. au> based on documentation by Jens Axboe. exe" --rw=randrw --bs=4k --iodepth=4 Further, the last logged histogram will always miss some of the final IOs and will never fully match the final output results (clat percentiles, disk ios, etc) which are totals from the whole job. fio; filecreate-ioengine. The load isn't that huge, a 100M image file with 93M Filesystem and 91M file. Fio version: 2. e. Fio ends up issuing 8 writes and afterwards issues the read commands to verify those 8 writes. 15 produce 0's at random time intervals when IO's are actually seen happening to the nvme SSD. g: C:\Windows\System32>"C:\Program Files (x86)\fio\fio\fio. Results look plausible (i. Since I am writing a single file, I thing these numbers should be the same. csv Flexible I/O Tester. clat (usec): min=5, max=175, avg=12. 1 KB/s v/s aggrb=35619KB/s [root@fractal-c92e fio-zfs]# cat FS_ __thread yes RUSAGE_THREAD yes SCHED_IDLE yes TCP_NODELAY yes Net engine window_size yes TCP_MAXSEG yes RLIMIT_MEMLOCK yes pwritev/preadv yes pwritev2/preadv2 yes IPv6 helpers yes Rados engine no Rados Block Device engine no rbd blkin tracing no setvbuf yes Gluster API engine no s390_z196_facilities no HDFS engine no MTD $ fio_jsonplus_clat2csv fio-jsonplus. can't be done (e. Code; Issues 177; Pull requests 9; Discussions; Actions; Projects 0; cLAT -> this is the main one which all customer report or look for the data. # the options disabled completion latency output such as 'disable_clat' and 'gtod_reduce' must not set. fio max value out of range: 4294967296 (4294967295 max) fio: failed parsing rate_min=4G fio: job global dropped Job file [global] # read-only bandwith test # run Hi, I want to verify the write operation during my VM backend (eg. rogowska@intel. conf file to include a "no_path_retry_count" variable is correct the path to follow. Here is the output file: fio: this platform does not support process shared mutexes, forcing use of threads. This was discovered on fio-3. 71 lat (usec Please acknowledge the following before creating a ticket. lnskp wcdws cjt mje pkmuvuzp jojnnf frb uvxx vijbgs aovjje