== sanity test 255a: check 'lfs ladvise -a willread' ===== 13:23:45 (1763403825)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 10.9767 s, 9.6 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-ffff894ac9b4e800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.442877
Iter 1/10: OSS cache speed: 0.505662
Iter 1/10: ladvise speed: 0.544952
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.470731
Iter 2/10: OSS cache speed: 0.483764
Iter 2/10: ladvise speed: 0.497332
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.439037
Iter 3/10: OSS cache speed: 0.513764
Iter 3/10: ladvise speed: 0.530207
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.398984
Iter 4/10: OSS cache speed: 0.538605
Iter 4/10: ladvise speed: 0.513703
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.385068
Iter 5/10: OSS cache speed: 0.489749
Iter 5/10: ladvise speed: 0.580429
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.466023
Iter 6/10: OSS cache speed: 0.533917
Iter 6/10: ladvise speed: 0.58212
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.47755
Iter 7/10: OSS cache speed: 0.585694
Iter 7/10: ladvise speed: 0.621845
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.507178
Iter 8/10: OSS cache speed: 0.454273
Iter 8/10: ladvise speed: 0.569001
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.470021
Iter 9/10: OSS cache speed: 0.568817
Iter 9/10: ladvise speed: 0.567691
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.510192
Iter 10/10: OSS cache speed: 0.56928
Iter 10/10: ladvise speed: 0.612756
Average uncached read: .45
Average speedup with OSS cached read:  .52 = +15%
Average speedup with ladvise willread:  .56 = +24%
Speedup with OSS cached read less than 20%,  got 15%. Skipping ladvise willread check.
fail_loc=0