== sanity test 255a: check 'lfs ladvise -a willread' ===== 10:08:28 (1782482908)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 8.24762 s, 12.7 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-ffff9fdcca554000.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.468868
Iter 1/10: OSS cache speed: 0.46893
Iter 1/10: ladvise speed: 0.529263
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.564984
Iter 2/10: OSS cache speed: 0.559827
Iter 2/10: ladvise speed: 0.577094
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.647736
Iter 3/10: OSS cache speed: 0.780402
Iter 3/10: ladvise speed: 0.680736
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.724026
Iter 4/10: OSS cache speed: 0.812375
Iter 4/10: ladvise speed: 0.899558
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.821979
Iter 5/10: OSS cache speed: 0.846137
Iter 5/10: ladvise speed: 0.778406
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.829801
Iter 6/10: OSS cache speed: 1.38319
Iter 6/10: ladvise speed: 0.852121
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.566336
Iter 7/10: OSS cache speed: 0.660121
Iter 7/10: ladvise speed: 0.388942
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.342153
Iter 8/10: OSS cache speed: 0.407882
Iter 8/10: ladvise speed: 0.428763
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.423008
Iter 9/10: OSS cache speed: 0.508242
Iter 9/10: ladvise speed: 0.579318
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.709663
Iter 10/10: OSS cache speed: 0.303335
Iter 10/10: ladvise speed: 0.470344
Average uncached read: .60
Average speedup with OSS cached read:  .67 = +11%
Average speedup with ladvise willread:  .61 = +1%
Speedup with OSS cached read less than 20%,  got 11%. Skipping ladvise willread check.
fail_loc=0