== sanity test 255a: check 'lfs ladvise -a willread' ===== 00:14:01 (1721880841)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 2.76764 s, 37.9 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
llite.lustre-ffff8800b5c58000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 2.6984
Iter 1/10: OSS cache speed: 2.74241
Iter 1/10: ladvise speed: 2.69841
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 2.72415
Iter 2/10: OSS cache speed: 2.68651
Iter 2/10: ladvise speed: 2.47366
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 2.64015
Iter 3/10: OSS cache speed: 2.6823
Iter 3/10: ladvise speed: 2.43104
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 2.62993
Iter 4/10: OSS cache speed: 2.60829
Iter 4/10: ladvise speed: 2.6375
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 2.70367
Iter 5/10: OSS cache speed: 2.62133
Iter 5/10: ladvise speed: 2.62389
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 2.64679
Iter 6/10: OSS cache speed: 2.71683
Iter 6/10: ladvise speed: 2.72854
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 2.69718
Iter 7/10: OSS cache speed: 2.78857
Iter 7/10: ladvise speed: 2.74657
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 2.77217
Iter 8/10: OSS cache speed: 2.813
Iter 8/10: ladvise speed: 2.47746
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 2.7165
Iter 9/10: OSS cache speed: 2.75552
Iter 9/10: ladvise speed: 2.69727
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 2.80133
Iter 10/10: OSS cache speed: 2.74062
Iter 10/10: ladvise speed: 2.75667
Average uncached read: 2.70
Average speedup with OSS cached read: 2.71 = +.37%
Average speedup with ladvise willread: 2.62 = +-2.96%
/home/green/git/lustre-release/lustre/tests/sanity.sh: line 25083:   < 20 : < 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
fail_loc=0