search for: swapin

...ite test ( dd if=/dev/zero of=./zero.img bs=4k count=100000 oflag=dsync ) I see in iotop that the actual disk write is 30 times the amount of data that I'm actually writing to disk). Total DISK READ: 0.00 B/s | Total DISK WRITE: 1001.23 M/s TIME TID PRIO USER DISK READ DISK WRITE SWAPIN IO COMMAND 10:59:53 34453 be/4 root 0.00 B/s 30.34 M/s 0.00 % 12.10 % dd if=/dev/zero of=./zero.img bs=4k count=100000 oflag=dsync Total DISK READ: 0.00 B/s | Total DISK WRITE: 991.92 M/s TIME TID PRIO USER DISK READ DISK WRITE SWAPIN IO COMMAND 10:59:54 34453 be/...

...wrote: > >>>>> On 22 Jun 2020, at 15:36, Ralph Campbell wrote: > >>>>>> On 6/21/20 4:20 PM, Zi Yan wrote: > >>>>>>> On 19 Jun 2020, at 17:56, Ralph Campbell wrote: > ... > >>> Ying(cc?d) developed the code to swapout and swapin THP in one piece: https://lore.kernel.org/linux-mm/20181207054122.27822-1-ying.huang at intel.com/. > >>> I am not sure whether the patchset makes into mainstream or not. It could be a good technical reference > >>> for swapping in device private pages, although swapping in...

...HO, the former might be preferred, > > >> since the latter might cost a lot of CPU cycles but still gives no THP after all. > > > > > > Sounds reasonable. I'll work on adding the fallback path for v2. > > > > Ying(cc?d) developed the code to swapout and swapin THP in one piece: https://lore.kernel.org/linux-mm/20181207054122.27822-1-ying.huang at intel.com/. > > I am not sure whether the patchset makes into mainstream or not. It could be a good technical reference > > for swapping in device private pages, although swapping in pages from disk...

...>>>>> On 22 Jun 2020, at 15:36, Ralph Campbell wrote: >>>>>>>> On 6/21/20 4:20 PM, Zi Yan wrote: >>>>>>>>> On 19 Jun 2020, at 17:56, Ralph Campbell wrote: >> ... >>>>> Ying(cc?d) developed the code to swapout and swapin THP in one piece: https://lore.kernel.org/linux-mm/20181207054122.27822-1-ying.huang at intel.com/. >>>>> I am not sure whether the patchset makes into mainstream or not. It could be a good technical reference >>>>> for swapping in device private pages, although swappi...

...or reclaiming CPU memory until you get a THP. IMHO, the former might be preferred, >> since the latter might cost a lot of CPU cycles but still gives no THP after all. > > Sounds reasonable. I'll work on adding the fallback path for v2. Ying(cc?d) developed the code to swapout and swapin THP in one piece: https://lore.kernel.org/linux-mm/20181207054122.27822-1-ying.huang at intel.com/. I am not sure whether the patchset makes into mainstream or not. It could be a good technical reference for swapping in device private pages, although swapping in pages from disk and from device priv...

...n 6/22/20 1:10 PM, Zi Yan wrote: >>>>> On 22 Jun 2020, at 15:36, Ralph Campbell wrote: >>>>>> On 6/21/20 4:20 PM, Zi Yan wrote: >>>>>>> On 19 Jun 2020, at 17:56, Ralph Campbell wrote: ... >>> Ying(cc?d) developed the code to swapout and swapin THP in one piece: https://lore.kernel.org/linux-mm/20181207054122.27822-1-ying.huang at intel.com/. >>> I am not sure whether the patchset makes into mainstream or not. It could be a good technical reference >>> for swapping in device private pages, although swapping in pages from...

...colClasses=mem.colclass,col.names=mem.colnames)); I am running R v2.10.0 on a 64-bit machine with Fedora 10 (Linux version 2.6.27.41-170.2.117.fc10.x86_64 ) with 6Gb of memory. There are no other significant programs running and `rm()` followed by ` gc()` successfully frees the memory (followed by swapins after other programs seek to used previously cached information swapped to disk). I've incorporated the memory-saving suggestions in the `read.csv()` manual page, excluding the limit on the lines read (which shouldn't really be necessary here since we're only talking about < 20 Mb o...

...y until you get a THP. IMHO, the former might be preferred, > >> since the latter might cost a lot of CPU cycles but still gives no THP after all. > > > > Sounds reasonable. I'll work on adding the fallback path for v2. > > Ying(cc?d) developed the code to swapout and swapin THP in one piece: https://lore.kernel.org/linux-mm/20181207054122.27822-1-ying.huang at intel.com/. > I am not sure whether the patchset makes into mainstream or not. It could be a good technical reference > for swapping in device private pages, although swapping in pages from disk and from d...

...e no_io_uuing share: https://paste.tnonline.net/files/G1impe8EHhUU_no_io_uring_copy.png ###### NO IO_URING ###### # iotop -o Total DISK READ :????? 86.32 M/s | Total DISK WRITE : 29.76 K/s Actual DISK READ:????? 88.13 M/s | Actual DISK WRITE: 22.32 K/s ? TID? PRIO? USER???? DISK READ? DISK WRITE? SWAPIN IO>??? COMMAND 29898 be/4 nasuser??? 10.06 M/s??? 0.00 B/s? 0.00 % 25.41 % smbd -D 29894 be/4 nasuser???? 9.53 M/s??? 0.00 B/s? 0.00 % 25.12 % smbd -D 29893 be/4 nasuser??? 10.58 M/s??? 0.00 B/s? 0.00 % 22.86 % smbd -D 29892 be/4 nasuser??? 13.40 M/s??? 0.00 B/s? 0.00 % 19.01 % smbd -D 29891 be/...

On Thu, Apr 30, 2020 at 10:25:49AM +0200, A L wrote: > So I did some more tests. smbclient mget does not copy in the same way > Windows Explorer does. When copying in Windows Explorer, there are many > multiple concurrent threads used to transfer the files. With smbclient mget > there are no corruptions, both locally and over the network from another > Linux machine. > > I

...ng handled between 3.1.1 and 3.1.2 on the remote side ? is this the reason for the slowness ? regards roland Total DISK READ :???? 278.72 M/s | Total DISK WRITE :?????? 0.00 B/s Actual DISK READ:????? 97.09 M/s | Actual DISK WRITE:?????? 0.00 B/s ? TID? PRIO? USER??? DISK READ>? DISK WRITE? SWAPIN????? IO COMMAND 32497 be/4 root??????? 261.41 G????? 0.00 B? 0.00 % 12.87 % rsync -av --inplace fnask::backupall_S2V2_xen-sr-rpkn01-nfs/ . 32498 be/4 root??????? 200.56 G???? 12.88 G? 0.00 % 21.41 % rsync -av --inplace fnask::backupall_S2V2_xen-sr-rpkn01-nfs/ . 24005 be/4 root???????? 81.52 G???? 1...

I use sernet-samba package (version 4.0.9-6) on Debian 7. Samba configured as additional AD controller. Samba process infinitely writes something to disk and makes high I/O load: Total DISK READ: 0.00 B/s | Total DISK WRITE: 204.37 K/s TID PRIO USER DISK READ DISK WRITE SWAPIN IO> COMMAND 140 be/3 root 0.00 B/s 0.00 B/s 0.00 % 58.45 % [jbd2/vda1-8] 4081 be/4 root 0.00 B/s 110.05 K/s 0.00 % 3.49 % samba -D It is not logs, I think, because they relatively small. /etc/samba/smb.conf # Global parameters [global] workgroup = DALSTRAZH...

On 22 Jun 2020, at 15:36, Ralph Campbell wrote: > On 6/21/20 4:20 PM, Zi Yan wrote: >> On 19 Jun 2020, at 17:56, Ralph Campbell wrote: >> >>> Support transparent huge page migration to ZONE_DEVICE private memory. >>> A new flag (MIGRATE_PFN_COMPOUND) is added to the input PFN array to >>> indicate the huge page was fully mapped by the CPU. >>>

...cgexec -g blkio:libvirt/qemu/background time dd if=/dev/zero of=trash2.img oflag=direct bs=1M count=4096 & Snap from iotop, showing an 8:1 ratio (should be 10:1, but 8:1 is acceptable): Total DISK READ: 0.00 B/s | Total DISK WRITE: 91.52 M/s TID PRIO USER DISK READ DISK WRITE SWAPIN IO> COMMAND 9602 be/4 root 0.00 B/s 10.71 M/s 0.00 % 98.54 % dd if=/dev/zero of=trash2.img oflag=direct bs=1M count=4096 9601 be/4 root 0.00 B/s 80.81 M/s 0.00 % 97.76 % dd if=/dev/zero of=trash1.img oflag=direct bs=1M count=4096 Further, checking the task list i...

...inutes! File browsing is not affected; but it takes forever to read contents of the files! When I use `iotop -o -d 30` (which measures I/O activity for 30-second interval) I can see: Total DISK READ: 98.66 K/s | Total DISK WRITE: 826.55 K/s TID PRIO USER DISK READ DISK WRITE SWAPIN IO> COMMAND 4296 be/4 root 3.99 K/s 408.59 K/s 0.00 % 98.64 % [btrfs-transacti] 6407 be/4 adam 94.14 K/s 0.00 B/s 0.00 % 85.24 % unison -server 311 be/4 root 0.00 B/s 0.00 B/s 0.00 % 58.20 % [md1_raid6] 354 be/3 root 0.00 B/s 2.26 K/s 0.00...