== sanity test 255a: check 'lfs ladvise -a willread' ===== 21:18:07 (1708827487)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 2.18532 s, 48.0 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=8
fail_loc=0x237
Asynchronous ladvise shouldn't wait
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.87612
Iter 1/10: OSS cache speed: 2.36278
Iter 1/10: ladvise speed: 2.5301
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.34599
Iter 2/10: OSS cache speed: 2.4498
Iter 2/10: ladvise speed: 2.4663
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.49458
Iter 3/10: OSS cache speed: 2.48793
Iter 3/10: ladvise speed: 2.61134
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.31906
Iter 4/10: OSS cache speed: 2.60514
Iter 4/10: ladvise speed: 2.63665
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.63144
Iter 5/10: OSS cache speed: 2.69625
Iter 5/10: ladvise speed: 2.46867
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.54927
Iter 6/10: OSS cache speed: 2.6447
Iter 6/10: ladvise speed: 2.51019
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.46349
Iter 7/10: OSS cache speed: 2.56668
Iter 7/10: ladvise speed: 2.41614
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.48491
Iter 8/10: OSS cache speed: 2.51431
Iter 8/10: ladvise speed: 2.79287
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.82239
Iter 9/10: OSS cache speed: 2.77407
Iter 9/10: ladvise speed: 2.88204
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.58672
Iter 10/10: OSS cache speed: 2.61048
Iter 10/10: ladvise speed: 2.40396
Average uncached read: 2.55
Average speedup with OSS cached read: 2.57 = +.78%
Average speedup with ladvise willread: 2.57 = +.78%
/home/green/git/lustre-release/lustre/tests/sanity.sh: line 24168:   < 20 : < 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
fail_loc=0