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block/nvme: Avoid further processing if trace event not enabled
Avoid further processing if TRACE_NVME_SUBMIT_COMMAND_RAW is not enabled. This is an untested intend of performance optimization. Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-Id: <20200821195359.1285345-3-philmd@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
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@ -441,6 +441,9 @@ static void nvme_trace_command(const NvmeCmd *cmd)
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{
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{
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int i;
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int i;
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if (!trace_event_get_state_backends(TRACE_NVME_SUBMIT_COMMAND_RAW)) {
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return;
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}
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for (i = 0; i < 8; ++i) {
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for (i = 0; i < 8; ++i) {
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uint8_t *cmdp = (uint8_t *)cmd + i * 8;
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uint8_t *cmdp = (uint8_t *)cmd + i * 8;
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trace_nvme_submit_command_raw(cmdp[0], cmdp[1], cmdp[2], cmdp[3],
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trace_nvme_submit_command_raw(cmdp[0], cmdp[1], cmdp[2], cmdp[3],
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