== sanity test 834: mmap readahead for madvise with MADV_HUGEPAGE ========================================================== 21:02:32 (1763344952)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 9.87002 s, 10.6 MB/s
llite.lustre-ffff960a07c35000.read_ahead_stats=clear
llite.lustre-ffff960a07c35000.read_ahead_stats=
snapshot_time             1763344983.949778333 secs.nsecs
start_time                1763344967.477577318 secs.nsecs
elapsed_time              16.472201015 secs.nsecs
hits                      25370 samples [pages]
misses                    230 samples [pages]
zero_size_window          96 samples [pages]
failed_to_reach_end       2 samples [pages]
failed_to_fast_read       230 samples [pages]
mmap_range_read           225 samples [pages]
readahead_pages           225 samples [pages] 8 128 25370
/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=226423: Sun Nov 16 21:15:08 2025
  read: IOPS=7, BW=7304KiB/s (7479kB/s)(5120MiB/717827msec)
    clat (msec): min=15, max=374, avg=139.61, stdev=46.44
     lat (msec): min=15, max=374, avg=139.61, stdev=46.44
    clat percentiles (msec):
     |  1.00th=[   75],  5.00th=[   84], 10.00th=[   90], 20.00th=[  100],
     | 30.00th=[  109], 40.00th=[  120], 50.00th=[  131], 60.00th=[  144],
     | 70.00th=[  157], 80.00th=[  176], 90.00th=[  205], 95.00th=[  232],
     | 99.00th=[  279], 99.50th=[  300], 99.90th=[  342], 99.95th=[  355],
     | 99.99th=[  376]
   bw (  KiB/s): min= 1924, max=12288, per=100.00%, avg=7340.83, stdev=2092.38, samples=1416
   iops        : min=    1, max=   12, avg= 6.48, stdev= 2.12, samples=1416
  lat (msec)   : 20=0.06%, 50=0.06%, 100=20.61%, 250=76.46%, 500=2.81%
  cpu          : usr=0.39%, sys=31.02%, ctx=27231, majf=7839, minf=1303150
  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=7304KiB/s (7479kB/s), 7304KiB/s-7304KiB/s (7479kB/s-7479kB/s), io=5120MiB (5369MB), run=717827-717827msec