== sanity test 255a: check 'lfs ladvise -a willread' ===== 17:09:02 (1781212142)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 15.3626 s, 6.8 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-ffff90ab106b2800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.274976
Iter 1/10: OSS cache speed: 0.287202
Iter 1/10: ladvise speed: 0.255923
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.303334
Iter 2/10: OSS cache speed: 0.317219
Iter 2/10: ladvise speed: 0.286536
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.328716
Iter 3/10: OSS cache speed: 0.347478
Iter 3/10: ladvise speed: 0.30457
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.264823
Iter 4/10: OSS cache speed: 0.325198
Iter 4/10: ladvise speed: 0.303818
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.295981
Iter 5/10: OSS cache speed: 0.327519
Iter 5/10: ladvise speed: 0.300181
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.295966
Iter 6/10: OSS cache speed: 0.330253
Iter 6/10: ladvise speed: 0.320322
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.346481
Iter 7/10: OSS cache speed: 0.363599
Iter 7/10: ladvise speed: 0.339522
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.326575
Iter 8/10: OSS cache speed: 0.333073
Iter 8/10: ladvise speed: 0.289826
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.381412
Iter 9/10: OSS cache speed: 0.391461
Iter 9/10: ladvise speed: 0.425721
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.265602
Iter 10/10: OSS cache speed: 0.311257
Iter 10/10: ladvise speed: 0.352794
Average uncached read: .30
Average speedup with OSS cached read:  .33 = +10%
Average speedup with ladvise willread:  .31 = +3%
Speedup with OSS cached read less than 20%,  got 10%. Skipping ladvise willread check.
fail_loc=0