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authorTobias Klauser <tklauser@distanz.ch>2016-04-22 16:38:51 +0200
committerTobias Klauser <tklauser@distanz.ch>2016-04-22 16:38:51 +0200
commit0cf15c320f9211d59b055157c895537e4b682a07 (patch)
treeb7ff6df8f735a110ec572c12e25ef0e3740ea26e /corking.c
parent5f06441c06d46499743689468971ecea9e14f984 (diff)
man: trafgen: Add example program, rewritten using the trafgen functions
Show how the trafgen header generation functions can make a trafgen script much more concise by rewritting Jesper's example using these functions. Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
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0 files changed, 0 insertions, 0 deletions
gle machine with 32 GB of RAM, write performance tests were ran with and without this change applied; the results are below: +---------+-----------+---------+--------+--------+ | fio v2.0.13 | Write Bandwidth (KB/s) | +---------+-----------+---------+--------+--------+ | # Tasks | GB / Task | Test 1 | Test 2 | Test 3 | +---------+-----------+---------+--------+--------+ | 1 | 64 | 452446 | 454623 | 457653 | | 2 | 32 | 850318 | 565373 | 602498 | | 4 | 16 | 1058900 | 463546 | 529107 | | 8 | 8 | 1026300 | 468190 | 576451 | | 16 | 4 | 1065500 | 503160 | 462902 | | 32 | 2 | 1068600 | 462228 | 466963 | | 64 | 1 | 991830 | 556618 | 557863 | +---------+-----------+---------+--------+--------+ * Test 1: Lustre client running 04ec54f. File per process write workload. This test was used as a baseline for what we _could_ achieve in the single shared file tests if the bottle necks were removed. * Test 2: Lustre client running 04ec54f. Single shared file workload, each task writing to a unique region. * Test 3: Lustre client running 04ec54f + this patch. Single shared file workload, each task writing to a unique region. In order to garner any real performance benefits out of a single shared file workload, the lli_write_mutex needs to be broken up into a range lock. That would allow write operations to unique regions of a file to be executed concurrently. This work is left to be done in a follow up patch. Signed-off-by: Prakash Surya <surya1@llnl.gov> Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-1669 Reviewed-on: http://review.whamcloud.com/6672 Reviewed-by: Lai Siyao <lai.siyao@intel.com> Reviewed-by: Andreas Dilger <andreas.dilger@intel.com> Reviewed-by: Jinshan Xiong <jinshan.xiong@intel.com> Reviewed-by: Oleg Drokin <oleg.drokin@intel.com> Signed-off-by: James Simmons <jsimmons@infradead.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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