== sanity test 255a: check 'lfs ladvise -a willread' ===== 10:52:36 (1761317556)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 1.57841 s, 66.4 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: 0.655527
Iter 1/10: OSS cache speed: 0.725056
Iter 1/10: ladvise speed: 0.786221
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.661448
Iter 2/10: OSS cache speed: 0.707392
Iter 2/10: ladvise speed: 0.776185
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.795426
Iter 3/10: OSS cache speed: 0.730882
Iter 3/10: ladvise speed: 0.80874
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.727839
Iter 4/10: OSS cache speed: 0.827352
Iter 4/10: ladvise speed: 0.620565
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.720039
Iter 5/10: OSS cache speed: 0.637232
Iter 5/10: ladvise speed: 0.576487
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.538588
Iter 6/10: OSS cache speed: 0.595055
Iter 6/10: ladvise speed: 0.678537
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.651301
Iter 7/10: OSS cache speed: 0.74047
Iter 7/10: ladvise speed: 0.767341
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.787819
Iter 8/10: OSS cache speed: 0.942908
Iter 8/10: ladvise speed: 0.791338
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.926177
Iter 9/10: OSS cache speed: 1.0143
Iter 9/10: ladvise speed: 0.899496
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.906449
Iter 10/10: OSS cache speed: 1.26188
Iter 10/10: ladvise speed: 1.70602
Average uncached read: .73
Average speedup with OSS cached read:  .81 = +10.95%
Average speedup with ladvise willread:  .84 = +15.06%
/home/green/git/lustre-release/lustre/tests/sanity.sh: line 21871: ¬3ÖU: < 20 : syntax error: operand expected (error token is "< 20 ")
lfs ladvise: cannot give advice: Operation not supported (95)
ladvise: cannot give advice 'dontneed' to file '/mnt/lustre/f255a.sanity': Operation not supported
osd-zfs does not support dontneed or drop_caches