xiaomi-sm8450/android_kernel_xiaomi_sm8450
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Kods Problēmas Izmaiņu pieprasījumi Darbības Pakotnes Projekti Laidieni Vikivietne Aktivitāte

IB/hfi1: Optimize pio_buf and send_context structs

Pārlūkot izejas kodu 
Both pio_buf and send_context structs have oversized
fields and have cachelines that can be optimized.

Reduce oversized fields for both structs.
Make sure pio_buf struct fits within a cacheline.
Move read-only fields to their own cacheline in
send_context struct.

All of this will avoid cacheline trading as the ring
progresses and pio buffers/send contexts are used.

Reviewed-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Sebastian Sanchez <sebastian.sanchez@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Šī revīzija ir iekļauta:
Sebastian Sanchez
2016-10-25 13:12:34 -07:00
revīziju iesūtīja Doug Ledford
vecāks 2474d775d9
revīzija 8af8d2970e
3 mainīti faili ar 28 papildinājumiem un 28 dzēšanām
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22
drivers/infiniband/hw/hfi1/pio_copy.c
Parādīt failu

@@ -129,8 +129,8 @@ void pio_copy(struct hfi1_devdata *dd, struct pio_buf *pbuf, u64 pbc,
dest += sizeof(u64);
}
dest -= pbuf->size;
dend -= pbuf->size;
dest -= pbuf->sc->size;
dend -= pbuf->sc->size;
}
/* write 8-byte non-SOP, non-wrap chunk data */
@@ -361,8 +361,8 @@ void seg_pio_copy_start(struct pio_buf *pbuf, u64 pbc,
dest += sizeof(u64);
}
dest -= pbuf->size;
dend -= pbuf->size;
dest -= pbuf->sc->size;
dend -= pbuf->sc->size;
}
/* write 8-byte non-SOP, non-wrap chunk data */
@@ -458,8 +458,8 @@ static void mid_copy_mix(struct pio_buf *pbuf, const void *from, size_t nbytes)
dest += sizeof(u64);
}
dest -= pbuf->size;
dend -= pbuf->size;
dest -= pbuf->sc->size;
dend -= pbuf->sc->size;
}
/* write 8-byte non-SOP, non-wrap chunk data */
@@ -492,7 +492,7 @@ static void mid_copy_mix(struct pio_buf *pbuf, const void *from, size_t nbytes)
*/
/* adjust if we have wrapped */
if (dest >= pbuf->end)
dest -= pbuf->size;
dest -= pbuf->sc->size;
/* jump to the SOP range if within the first block */
else if (pbuf->qw_written < PIO_BLOCK_QWS)
dest += SOP_DISTANCE;
@@ -584,8 +584,8 @@ static void mid_copy_straight(struct pio_buf *pbuf,
dest += sizeof(u64);
}
dest -= pbuf->size;
dend -= pbuf->size;
dest -= pbuf->sc->size;
dend -= pbuf->sc->size;
}
/* write 8-byte non-SOP, non-wrap chunk data */
@@ -666,7 +666,7 @@ void seg_pio_copy_mid(struct pio_buf *pbuf, const void *from, size_t nbytes)
*/
/* adjust if we've wrapped */
if (dest >= pbuf->end)
dest -= pbuf->size;
dest -= pbuf->sc->size;
/* jump to SOP range if within the first block */
else if (pbuf->qw_written < PIO_BLOCK_QWS)
dest += SOP_DISTANCE;
@@ -719,7 +719,7 @@ void seg_pio_copy_end(struct pio_buf *pbuf)
*/
/* adjust if we have wrapped */
if (dest >= pbuf->end)
dest -= pbuf->size;
dest -= pbuf->sc->size;
/* jump to the SOP range if within the first block */
else if (pbuf->qw_written < PIO_BLOCK_QWS)
dest += SOP_DISTANCE;