== sanity test 255a: check 'lfs ladvise -a willread' ===== 10:54:51 (1780325691)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 5.91473 s, 17.7 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-ffff9ae8c9e4e000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.880788
Iter 1/10: OSS cache speed: 0.962
Iter 1/10: ladvise speed: 0.94636
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.766309
Iter 2/10: OSS cache speed: 0.884858
Iter 2/10: ladvise speed: 0.870221
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.658056
Iter 3/10: OSS cache speed: 0.768994
Iter 3/10: ladvise speed: 0.856254
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.696595
Iter 4/10: OSS cache speed: 0.840564
Iter 4/10: ladvise speed: 1.00185
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.897532
Iter 5/10: OSS cache speed: 0.977381
Iter 5/10: ladvise speed: 1.02921
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.469031
Iter 6/10: OSS cache speed: 0.409238
Iter 6/10: ladvise speed: 0.620547
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.536559
Iter 7/10: OSS cache speed: 0.574289
Iter 7/10: ladvise speed: 0.602308
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.549098
Iter 8/10: OSS cache speed: 0.549868
Iter 8/10: ladvise speed: 0.643573
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.560586
Iter 9/10: OSS cache speed: 0.652691
Iter 9/10: ladvise speed: 0.724297
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.629318
Iter 10/10: OSS cache speed: 0.734287
Iter 10/10: ladvise speed: 0.784068
Average uncached read: .66
Average speedup with OSS cached read:  .73 = +10%
Average speedup with ladvise willread:  .80 = +21%
Speedup with OSS cached read less than 20%,  got 10%. Skipping ladvise willread check.
fail_loc=0