== sanity test 834: mmap readahead for madvise with MADV_HUGEPAGE ========================================================== 06:58:51 (1773745131)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 6.52286 s, 16.1 MB/s
llite.lustre-ffff8fb3ab704000.read_ahead_stats=clear
llite.lustre-ffff8fb3ab704000.read_ahead_stats=
snapshot_time             1773745147.252161595 secs.nsecs
start_time                1773745140.381792977 secs.nsecs
elapsed_time              6.870368618 secs.nsecs
hits                      25567 samples [pages]
misses                    33 samples [pages]
zero_size_window          3 samples [pages]
async_readahead           2 samples [pages]
failed_to_fast_read       36 samples [pages]
mmap_range_read           28 samples [pages]
readahead_pages           35 samples [pages] 8 4096 25567
/usr/bin/fio
thp                     : Memory Advise Huge Page
read_test: (g=0): rw=read, bs=(R) 1024KiB-1024KiB, (W) 1024KiB-1024KiB, (T) 1024KiB-1024KiB, ioengine=mmap, iodepth=1
fio-3.19
Starting 1 process

read_test: (groupid=0, jobs=1): err= 0: pid=294567: Tue Mar 17 07:06:51 2026
  read: IOPS=11, BW=11.1MiB/s (11.6MB/s)(5120MiB/461246msec)
    clat (msec): min=34, max=267, avg=89.88, stdev=36.39
     lat (msec): min=34, max=267, avg=89.88, stdev=36.39
    clat percentiles (msec):
     |  1.00th=[   63],  5.00th=[   67], 10.00th=[   69], 20.00th=[   71],
     | 30.00th=[   72], 40.00th=[   74], 50.00th=[   75], 60.00th=[   77],
     | 70.00th=[   80], 80.00th=[   87], 90.00th=[  155], 95.00th=[  169],
     | 99.00th=[  218], 99.50th=[  224], 99.90th=[  230], 99.95th=[  239],
     | 99.99th=[  268]
   bw (  KiB/s): min= 2043, max=16384, per=100.00%, avg=11398.58, stdev=3688.45, samples=919
   iops        : min=    1, max=   16, avg=10.99, stdev= 3.61, samples=919
  lat (msec)   : 50=0.08%, 100=82.34%, 250=17.54%, 500=0.04%
  cpu          : usr=0.61%, sys=83.53%, ctx=12125, majf=5160, minf=1305828
  IO depths    : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0%
     submit    : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
     complete  : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
     issued rwts: total=5120,0,0,0 short=0,0,0,0 dropped=0,0,0,0
     latency   : target=0, window=0, percentile=100.00%, depth=1

Run status group 0 (all jobs):
   READ: bw=11.1MiB/s (11.6MB/s), 11.1MiB/s-11.1MiB/s (11.6MB/s-11.6MB/s), io=5120MiB (5369MB), run=461246-461246msec