== sanity test 255a: check 'lfs ladvise -a willread' ===== 11:56:05 (1776182165)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 2.05542 s, 51.0 MB/s
ladvise: range [2, 1] is invalid
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

ladvise: range [2, 2] is invalid
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

ladvise: conflicting arguments of -l and -e
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

Synchronous ladvise should wait
fail_val=4
fail_loc=0x237
Asynchronous ladvise shouldn't wait
fail_loc=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.596944
Iter 1/10: OSS cache speed: 0.528005
Iter 1/10: ladvise speed: 0.593868
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.590288
Iter 2/10: OSS cache speed: 0.578544
Iter 2/10: ladvise speed: 0.520058
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.561506
Iter 3/10: OSS cache speed: 0.540773
Iter 3/10: ladvise speed: 0.544597
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.524497
Iter 4/10: OSS cache speed: 0.519698
Iter 4/10: ladvise speed: 0.611083
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.602125
Iter 5/10: OSS cache speed: 0.630612
Iter 5/10: ladvise speed: 0.650461
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.682393
Iter 6/10: OSS cache speed: 0.687504
Iter 6/10: ladvise speed: 0.607875
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.551114
Iter 7/10: OSS cache speed: 0.696722
Iter 7/10: ladvise speed: 0.654138
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.652982
Iter 8/10: OSS cache speed: 0.648669
Iter 8/10: ladvise speed: 0.621932
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.712234
Iter 9/10: OSS cache speed: 0.633102
Iter 9/10: ladvise speed: 0.665561
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.67695
Iter 10/10: OSS cache speed: 0.708555
Iter 10/10: ladvise speed: 0.610019
Average uncached read: .61
Average speedup with OSS cached read:  .61 = +0%
Average speedup with ladvise willread:  .60 = +-1.63%
/home/green/git/lustre-release/lustre/tests/sanity.sh: line 21950: ÐËðyÇU: < 20 : syntax error: operand expected (error token is "< 20 ")
lfs ladvise: cannot give advice: Unknown error 524 (524)
ladvise: cannot give advice 'dontneed' to file '/mnt/lustre/f255a.sanity': Unknown error 524
osd-zfs does not support dontneed or drop_caches