== sanity test 255a: check 'lfs ladvise -a willread' ===== 01:41:22 (1761284482)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.11606 s, 17.1 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-ffff88d58e604800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.357633
Iter 1/10: OSS cache speed: 0.528267
Iter 1/10: ladvise speed: 0.479273
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.331038
Iter 2/10: OSS cache speed: 0.479478
Iter 2/10: ladvise speed: 0.450333
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.421839
Iter 3/10: OSS cache speed: 0.399741
Iter 3/10: ladvise speed: 0.417181
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.415193
Iter 4/10: OSS cache speed: 0.479711
Iter 4/10: ladvise speed: 0.493421
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.496474
Iter 5/10: OSS cache speed: 0.553341
Iter 5/10: ladvise speed: 0.564928
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.473274
Iter 6/10: OSS cache speed: 0.479828
Iter 6/10: ladvise speed: 0.478044
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.504142
Iter 7/10: OSS cache speed: 0.501517
Iter 7/10: ladvise speed: 0.471571
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.448043
Iter 8/10: OSS cache speed: 0.451737
Iter 8/10: ladvise speed: 0.476884
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.476134
Iter 9/10: OSS cache speed: 0.452404
Iter 9/10: ladvise speed: 0.442835
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.452685
Iter 10/10: OSS cache speed: 0.538315
Iter 10/10: ladvise speed: 0.513558
Average uncached read: .43
Average speedup with OSS cached read:  .48 = +11%
Average speedup with ladvise willread:  .47 = +9%
Speedup with OSS cached read less than 20%,  got 11%. Skipping ladvise willread check.
fail_loc=0