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gpu: nvgpu: Add a generic profiler

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Add a generic profiler based on the channel kickoff profiler. This
aims to provide a mechanism to allow engineers to (more) easily profile
arbitrary software paths within nvgpu.

Usage of this profiler is still primarily through debugfs. Next up is
a generic debugfs interface for this profiler in the Linux code.

The end goal for this is to profile the recovery code and generate
interesting statistics.

JIRA NVGPU-5606

Signed-off-by: Alex Waterman <alexw@nvidia.com>
Change-Id: I99783ec7e5143855845bde4e98760ff43350456d
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2355319
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
This commit is contained in:
Alex Waterman
2020-06-01 19:56:37 -05:00
parent 59eb714c48
commit 70ce67df2d
18 changed files with 579 additions and 292 deletions
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17
drivers/gpu/nvgpu/os/linux/ioctl_channel.c
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@@ -46,9 +46,11 @@
#include <nvgpu/gr/obj_ctx.h>
#include <nvgpu/fence.h>
#include <nvgpu/preempt.h>
#include <nvgpu/profile.h>
#include <nvgpu/swprofile.h>
#include <nvgpu/nvgpu_init.h>
#include <nvgpu/fifo/swprofile.h>
#include "platform_gk20a.h"
#include "ioctl_channel.h"
#include "channel.h"
@@ -792,10 +794,11 @@ static int gk20a_ioctl_channel_submit_gpfifo(
{
struct nvgpu_channel_fence fence;
struct nvgpu_fence_type *fence_out;
struct nvgpu_profile *profile = NULL;
u32 submit_flags = 0;
int fd = -1;
struct gk20a *g = ch->g;
struct nvgpu_fifo *f = &g->fifo;
struct nvgpu_swprofiler *kickoff_profiler = &f->kickoff_profiler;
struct nvgpu_gpfifo_userdata userdata;
bool flag_fence_wait = (args->flags &
NVGPU_SUBMIT_GPFIFO_FLAGS_FENCE_WAIT) != 0U;
@@ -807,8 +810,8 @@ static int gk20a_ioctl_channel_submit_gpfifo(
int ret = 0;
nvgpu_log_fn(g, " ");
profile = nvgpu_profile_acquire(ch->g);
nvgpu_profile_snapshot(profile, PROFILE_IOCTL_ENTRY);
nvgpu_swprofile_begin_sample(kickoff_profiler);
nvgpu_swprofile_snapshot(kickoff_profiler, PROF_KICKOFF_IOCTL_ENTRY);
if (nvgpu_channel_check_unserviceable(ch)) {
return -ETIMEDOUT;
@@ -846,7 +849,7 @@ static int gk20a_ioctl_channel_submit_gpfifo(
ret = nvgpu_submit_channel_gpfifo_user(ch,
userdata, args->num_entries,
submit_flags, &fence, &fence_out, profile);
submit_flags, &fence, &fence_out, kickoff_profiler);
if (ret) {
if (fd != -1)
@@ -869,9 +872,7 @@ static int gk20a_ioctl_channel_submit_gpfifo(
}
nvgpu_fence_put(fence_out);
nvgpu_profile_snapshot(profile, PROFILE_IOCTL_EXIT);
if (profile)
nvgpu_profile_release(ch->g, profile);
nvgpu_swprofile_snapshot(kickoff_profiler, PROF_KICKOFF_IOCTL_EXIT);
clean_up:
return ret;