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drm/i915/execlists: Pack the count into the low bits of the port.request

Browse Source 
add/remove: 1/1 grow/shrink: 5/4 up/down: 391/-578 (-187)
function                                     old     new   delta
execlists_submit_ports                       262     471    +209
port_assign.isra                               -     136    +136
capture                                     6344    6359     +15
reset_common_ring                            438     452     +14
execlists_submit_request                     228     238     +10
gen8_init_common_ring                        334     341      +7
intel_engine_is_idle                         106     105      -1
i915_engine_info                            2314    2290     -24
__i915_gem_set_wedged_BKL                    485     411     -74
intel_lrc_irq_handler                       1789    1604    -185
execlists_update_context                     294       -    -294

The most important change there is the improve to the
intel_lrc_irq_handler and excclist_submit_ports (net improvement since
execlists_update_context is now inlined).

v2: Use the port_api() for guc as well (even though currently we do not
pack any counters in there, yet) and hide all port->request_count inside
the helpers.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuoppala@intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170517121007.27224-5-chris@chris-wilson.co.uk
This commit is contained in:
Chris Wilson
2017-05-17 13:10:00 +01:00
parent 0ce8178808
commit 77f0d0e925
7 changed files with 125 additions and 92 deletions
Download Patch File Download Diff File Expand all files Collapse all files

32
drivers/gpu/drm/i915/i915_debugfs.c
View File

@@ -3353,6 +3353,7 @@ static int i915_engine_info(struct seq_file *m, void *unused)
if (i915.enable_execlists) {
u32 ptr, read, write;
struct rb_node *rb;
unsigned int idx;
seq_printf(m, "\tExeclist status: 0x%08x %08x\n",
I915_READ(RING_EXECLIST_STATUS_LO(engine)),
@@ -3370,8 +3371,7 @@ static int i915_engine_info(struct seq_file *m, void *unused)
if (read > write)
write += GEN8_CSB_ENTRIES;
while (read < write) {
unsigned int idx = ++read % GEN8_CSB_ENTRIES;
idx = ++read % GEN8_CSB_ENTRIES;
seq_printf(m, "\tExeclist CSB[%d]: 0x%08x, context: %d\n",
idx,
I915_READ(RING_CONTEXT_STATUS_BUF_LO(engine, idx)),
@@ -3379,21 +3379,19 @@ static int i915_engine_info(struct seq_file *m, void *unused)
}
rcu_read_lock();
rq = READ_ONCE(engine->execlist_port[0].request);
if (rq) {
seq_printf(m, "\t\tELSP[0] count=%d, ",
engine->execlist_port[0].count);
print_request(m, rq, "rq: ");
} else {
seq_printf(m, "\t\tELSP[0] idle\n");
}
rq = READ_ONCE(engine->execlist_port[1].request);
if (rq) {
seq_printf(m, "\t\tELSP[1] count=%d, ",
engine->execlist_port[1].count);
print_request(m, rq, "rq: ");
} else {
seq_printf(m, "\t\tELSP[1] idle\n");
for (idx = 0; idx < ARRAY_SIZE(engine->execlist_port); idx++) {
unsigned int count;
rq = port_unpack(&engine->execlist_port[idx],
&count);
if (rq) {
seq_printf(m, "\t\tELSP[%d] count=%d, ",
idx, count);
print_request(m, rq, "rq: ");
} else {
seq_printf(m, "\t\tELSP[%d] idle\n",
idx);
}
}
rcu_read_unlock();