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...These spin_on_onwer variant also cause rcu stall before we apply this patch set We also have observed some performace improvements. PPC test result: 1 copy - 0.94% 2 copy - 7.17% 4 copy - 11.9% 8 copy - 3.04% 16 copy - 15.11% details below: Without patch: 1 copy - File Write 4096 bufsize 8000 maxblocks 2188223.0 KBps (30.0 s, 1 samples) 2 copy - File Write 4096 bufsize 8000 maxblocks 1804433.0 KBps (30.0 s, 1 samples) 4 copy - File Write 4096 bufsize 8000 maxblocks 1237257.0 KBps (30.0 s, 1 samples) 8 copy - File Write 4096 bufsize 8000 maxblocks 1032658.0 KBps (30.0 s, 1...

...These spin_on_onwer variant also cause rcu stall before we apply this patch set We also have observed some performace improvements. PPC test result: 1 copy - 0.94% 2 copy - 7.17% 4 copy - 11.9% 8 copy - 3.04% 16 copy - 15.11% details below: Without patch: 1 copy - File Write 4096 bufsize 8000 maxblocks 2188223.0 KBps (30.0 s, 1 samples) 2 copy - File Write 4096 bufsize 8000 maxblocks 1804433.0 KBps (30.0 s, 1 samples) 4 copy - File Write 4096 bufsize 8000 maxblocks 1237257.0 KBps (30.0 s, 1 samples) 8 copy - File Write 4096 bufsize 8000 maxblocks 1032658.0 KBps (30.0 s, 1...

...set > > We also have observed some performace improvements. > > PPC test result: > > 1 copy - 0.94% > 2 copy - 7.17% > 4 copy - 11.9% > 8 copy - 3.04% > 16 copy - 15.11% > > details below: > Without patch: > > 1 copy - File Write 4096 bufsize 8000 maxblocks 2188223.0 KBps (30.0 s, 1 samples) > 2 copy - File Write 4096 bufsize 8000 maxblocks 1804433.0 KBps (30.0 s, 1 samples) > 4 copy - File Write 4096 bufsize 8000 maxblocks 1237257.0 KBps (30.0 s, 1 samples) > 8 copy - File Write 4096 bufsize 8000 maxblocks 1032658.0 K...

...set > > We also have observed some performace improvements. > > PPC test result: > > 1 copy - 0.94% > 2 copy - 7.17% > 4 copy - 11.9% > 8 copy - 3.04% > 16 copy - 15.11% > > details below: > Without patch: > > 1 copy - File Write 4096 bufsize 8000 maxblocks 2188223.0 KBps (30.0 s, 1 samples) > 2 copy - File Write 4096 bufsize 8000 maxblocks 1804433.0 KBps (30.0 s, 1 samples) > 4 copy - File Write 4096 bufsize 8000 maxblocks 1237257.0 KBps (30.0 s, 1 samples) > 8 copy - File Write 4096 bufsize 8000 maxblocks 1032658.0 K...

...also have observed some performace improvements in uninx benchmark tests. > > PPC test result: > 1 copy - 0.94% > 2 copy - 7.17% > 4 copy - 11.9% > 8 copy - 3.04% > 16 copy - 15.11% > > details below: > Without patch: > > 1 copy - File Write 4096 bufsize 8000 maxblocks 2188223.0 KBps (30.0 s, 1 samples) > 2 copy - File Write 4096 bufsize 8000 maxblocks 1804433.0 KBps (30.0 s, 1 samples) > 4 copy - File Write 4096 bufsize 8000 maxblocks 1237257.0 KBps (30.0 s, 1 samples) > 8 copy - File Write 4096 bufsize 8000 maxblocks 1032658.0 K...

...ant also cause rcu stall before we apply this patch set We also have observed some performace improvements in uninx benchmark tests. PPC test result: 1 copy - 0.94% 2 copy - 7.17% 4 copy - 11.9% 8 copy - 3.04% 16 copy - 15.11% details below: Without patch: 1 copy - File Write 4096 bufsize 8000 maxblocks 2188223.0 KBps (30.0 s, 1 samples) 2 copy - File Write 4096 bufsize 8000 maxblocks 1804433.0 KBps (30.0 s, 1 samples) 4 copy - File Write 4096 bufsize 8000 maxblocks 1237257.0 KBps (30.0 s, 1 samples) 8 copy - File Write 4096 bufsize 8000 maxblocks 1032658.0 KBps (30.0 s, 1...

...ant also cause rcu stall before we apply this patch set We also have observed some performace improvements in uninx benchmark tests. PPC test result: 1 copy - 0.94% 2 copy - 7.17% 4 copy - 11.9% 8 copy - 3.04% 16 copy - 15.11% details below: Without patch: 1 copy - File Write 4096 bufsize 8000 maxblocks 2188223.0 KBps (30.0 s, 1 samples) 2 copy - File Write 4096 bufsize 8000 maxblocks 1804433.0 KBps (30.0 s, 1 samples) 4 copy - File Write 4096 bufsize 8000 maxblocks 1237257.0 KBps (30.0 s, 1 samples) 8 copy - File Write 4096 bufsize 8000 maxblocks 1032658.0 KBps (30.0 s, 1...

Hi, When I upload files into the gluster volume, it replicates all the files to both gluster nodes. But the file size slightly varies by (4-10KB), which changes the md5sum of the file. Command to check file size : du -k *. I'm using glusterFS 3.3.1 with Centos 6.4 This is creating inconsistency between the files on both the bricks. ? What is the reason for this changed file size and how can

Based on some tests we ran, it seems the biggest performance hit you get from running within domU is from disk I/O. We did some mysql read and write tests, and for both, our performance is about half that compared to native. Has that been others'' experience? Is there any way to make this better? We are using physical partitions. In contrast, cpu/memory tests appear to be near

...ant also cause rcu stall before we apply this patch set We also have observed some performace improvements in uninx benchmark tests. PPC test result: 1 copy - 0.94% 2 copy - 7.17% 4 copy - 11.9% 8 copy - 3.04% 16 copy - 15.11% details below: Without patch: 1 copy - File Write 4096 bufsize 8000 maxblocks 2188223.0 KBps (30.0 s, 1 samples) 2 copy - File Write 4096 bufsize 8000 maxblocks 1804433.0 KBps (30.0 s, 1 samples) 4 copy - File Write 4096 bufsize 8000 maxblocks 1237257.0 KBps (30.0 s, 1 samples) 8 copy - File Write 4096 bufsize 8000 maxblocks 1032658.0 KBps (30.0 s, 1...

...ant also cause rcu stall before we apply this patch set We also have observed some performace improvements in uninx benchmark tests. PPC test result: 1 copy - 0.94% 2 copy - 7.17% 4 copy - 11.9% 8 copy - 3.04% 16 copy - 15.11% details below: Without patch: 1 copy - File Write 4096 bufsize 8000 maxblocks 2188223.0 KBps (30.0 s, 1 samples) 2 copy - File Write 4096 bufsize 8000 maxblocks 1804433.0 KBps (30.0 s, 1 samples) 4 copy - File Write 4096 bufsize 8000 maxblocks 1237257.0 KBps (30.0 s, 1 samples) 8 copy - File Write 4096 bufsize 8000 maxblocks 1032658.0 KBps (30.0 s, 1...

...u > is running or not. > > unix benchmark result: > host: kernel 4.8.1, i5-4570, 4 cpus > guest: kernel 4.8.1, 8 vcpus > > test-case after-patch before-patch > Execl Throughput | 18307.9 lps | 11701.6 lps > File Copy 1024 bufsize 2000 maxblocks | 1352407.3 KBps | 790418.9 KBps > File Copy 256 bufsize 500 maxblocks | 367555.6 KBps | 222867.7 KBps > File Copy 4096 bufsize 8000 maxblocks | 3675649.7 KBps | 1780614.4 KBps > Pipe Throughput | 11872208.7 lps | 11855628.9 lps > Pipe-based Conte...

...u > is running or not. > > unix benchmark result: > host: kernel 4.8.1, i5-4570, 4 cpus > guest: kernel 4.8.1, 8 vcpus > > test-case after-patch before-patch > Execl Throughput | 18307.9 lps | 11701.6 lps > File Copy 1024 bufsize 2000 maxblocks | 1352407.3 KBps | 790418.9 KBps > File Copy 256 bufsize 500 maxblocks | 367555.6 KBps | 222867.7 KBps > File Copy 4096 bufsize 8000 maxblocks | 3675649.7 KBps | 1780614.4 KBps > Pipe Throughput | 11872208.7 lps | 11855628.9 lps > Pipe-based Conte...

...ant also cause rcu stall before we apply this patch set We also have observed some performace improvements in uninx benchmark tests. PPC test result: 1 copy - 0.94% 2 copy - 7.17% 4 copy - 11.9% 8 copy - 3.04% 16 copy - 15.11% details below: Without patch: 1 copy - File Write 4096 bufsize 8000 maxblocks 2188223.0 KBps (30.0 s, 1 samples) 2 copy - File Write 4096 bufsize 8000 maxblocks 1804433.0 KBps (30.0 s, 1 samples) 4 copy - File Write 4096 bufsize 8000 maxblocks 1237257.0 KBps (30.0 s, 1 samples) 8 copy - File Write 4096 bufsize 8000 maxblocks 1032658.0 KBps (30.0 s, 1...

...ant also cause rcu stall before we apply this patch set We also have observed some performace improvements in uninx benchmark tests. PPC test result: 1 copy - 0.94% 2 copy - 7.17% 4 copy - 11.9% 8 copy - 3.04% 16 copy - 15.11% details below: Without patch: 1 copy - File Write 4096 bufsize 8000 maxblocks 2188223.0 KBps (30.0 s, 1 samples) 2 copy - File Write 4096 bufsize 8000 maxblocks 1804433.0 KBps (30.0 s, 1 samples) 4 copy - File Write 4096 bufsize 8000 maxblocks 1237257.0 KBps (30.0 s, 1 samples) 8 copy - File Write 4096 bufsize 8000 maxblocks 1032658.0 KBps (30.0 s, 1...

...lock-size parameter to limit the xz block size. Because of the increased size of the disk as a whole, this pushed the block size beyond the limit that the xz plugin can handle, and the test would fail with: nbdkit: error: /var/tmp/nbdkit-1.3.1/tests/disk.xz: xz file largest block is bigger than maxblock Either recompress the xz file with smaller blocks (see nbdkit-xz-plugin(1)) or make maxblock parameter bigger. maxblock = 536870912 (bytes) largest block in xz file = 1073741824 (bytes) Simple fix by adding the --block-size parameter. Note that to see the effect of this change you will ne...

FYI; I'm going to push this because it's such an obvious fix. Rich.

...that if one vcpu is running or not. unix benchmark result: host: kernel 4.8.1, i5-4570, 4 cpus guest: kernel 4.8.1, 8 vcpus test-case after-patch before-patch Execl Throughput | 18307.9 lps | 11701.6 lps File Copy 1024 bufsize 2000 maxblocks | 1352407.3 KBps | 790418.9 KBps File Copy 256 bufsize 500 maxblocks | 367555.6 KBps | 222867.7 KBps File Copy 4096 bufsize 8000 maxblocks | 3675649.7 KBps | 1780614.4 KBps Pipe Throughput | 11872208.7 lps | 11855628.9 lps Pipe-based Context Switching...

...------------------------------------------------------- test case | pv-qspinlock and qspinlock | current-spinlock ------------------------------------------------------------------------------------ Execl Throughput 761.1 761.4 File Copy 1024 bufsize 2000 maxblocks 1259.8 1286.6 File Copy 256 bufsize 500 maxblocks 782.2 790.3 File Copy 4096 bufsize 8000 maxblocks 2741.5 2817.4 Pipe Throughput 1063.2 1036.7 Pipe-based Context Switching 284.7...

...------------------------------------------------------- test case | pv-qspinlock and qspinlock | current-spinlock ------------------------------------------------------------------------------------ Execl Throughput 761.1 761.4 File Copy 1024 bufsize 2000 maxblocks 1259.8 1286.6 File Copy 256 bufsize 500 maxblocks 782.2 790.3 File Copy 4096 bufsize 8000 maxblocks 2741.5 2817.4 Pipe Throughput 1063.2 1036.7 Pipe-based Context Switching 284.7...